CN113989667B - Near-ground formaldehyde concentration acquisition method based on satellite remote sensing technology - Google Patents

Near-ground formaldehyde concentration acquisition method based on satellite remote sensing technology Download PDF

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CN113989667B
CN113989667B CN202111251623.2A CN202111251623A CN113989667B CN 113989667 B CN113989667 B CN 113989667B CN 202111251623 A CN202111251623 A CN 202111251623A CN 113989667 B CN113989667 B CN 113989667B
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formaldehyde
total amount
satellite
cell
simulated
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CN113989667A (en
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刘诚
苏文静
张成歆
胡启后
陈羽佳
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Institute of Advanced Technology University of Science and Technology of China
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Institute of Advanced Technology University of Science and Technology of China
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

The invention discloses a near-ground formaldehyde concentration acquisition method based on a satellite remote sensing technology, a near-ground formaldehyde concentration acquisition system based on the satellite remote sensing technology and a computer readable storage medium, wherein the method comprises the following steps: dividing satellite cells; obtaining the total amount of formaldehyde columns of an observation troposphere of a satellite cell; screening target model cells corresponding to the satellite cells, and obtaining the total amount of simulated troposphere formaldehyde columns and the total amount of simulated boundary layer formaldehyde columns of the target model cells; calculating the total amount of the theoretical boundary layer formaldehyde columns of the satellite unit cells according to a preset calculation rule; and acquiring the pressure difference between the boundary layer and the near-ground, and calculating the first theoretical near-ground formaldehyde concentration of the satellite cells according to a first preset algorithm based on the total amount of the theoretical boundary layer formaldehyde columns of the satellite cells. The near-ground formaldehyde concentration acquisition method based on the satellite remote sensing technology disclosed by the invention can solve the technical problem that an accurate and effective near-ground formaldehyde concentration acquisition method is lacking at present.

Description

Near-ground formaldehyde concentration acquisition method based on satellite remote sensing technology
Technical Field
The invention belongs to the technical field of satellite remote sensing, and particularly relates to a near-ground formaldehyde concentration acquisition method based on a satellite remote sensing technology, a near-ground formaldehyde concentration acquisition system based on the satellite remote sensing technology and a computer readable storage medium.
Background
The formaldehyde in the air can cause great harm to human health, and in recent years, with the gradual maturation of satellite remote sensing technology, long-time and large-scale global observation of atmospheric formaldehyde can be realized, and the defect that a ground monitoring station lacks formaldehyde observation means is overcome.
The total amount of tropospheric formaldehyde columns currently observed by satellite remote sensing technology reflects the total formaldehyde concentration from near ground to the tropospheric. However, in practice, in areas of high formaldehyde emission, most of the formaldehyde is concentrated near the ground, while in boundary layers, the formaldehyde is generally uniformly distributed. Therefore, the total amount of the troposphere formaldehyde column based on satellite inversion cannot accurately represent the near-ground formaldehyde concentration due to the difference of the atmospheric formaldehyde in the vertical distribution state. However, near-surface formaldehyde is a key active component for near-surface ozone formation and has the greatest harm to human health, so that an accurate and effective near-surface formaldehyde concentration acquisition method is needed.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a near-ground formaldehyde concentration acquisition method based on a satellite remote sensing technology, and aims to solve the technical problem that an accurate and effective near-ground formaldehyde concentration acquisition method is lacking at present.
The invention adopts the following technical scheme to achieve the aim of the invention:
a near-ground formaldehyde concentration acquisition method based on satellite remote sensing technology comprises the following steps:
dividing a plurality of satellite cells by using a satellite remote sensing platform;
obtaining the total amount of formaldehyde columns of an observation troposphere in each satellite cell by using a satellite remote sensing platform;
screening a plurality of target model cells corresponding to a plurality of satellite cells by using an atmospheric gas transmission model, and obtaining the total amount of simulated troposphere formaldehyde columns in each target model cell and the total amount of simulated boundary layer formaldehyde columns in each target model cell;
based on the total amount of the observed tropospheric formaldehyde columns in each satellite cell, the total amount of the simulated tropospheric formaldehyde columns in each target model cell and the total amount of the simulated boundary layer formaldehyde columns in each target model cell, respectively calculating the total amount of the theoretical boundary layer formaldehyde columns in each satellite cell according to a preset calculation rule;
and acquiring the pressure difference between the boundary layer and the near-ground, and respectively calculating the first theoretical near-ground formaldehyde concentration in each satellite cell according to a first preset algorithm based on the total amount of the theoretical boundary layer formaldehyde columns in each satellite cell.
Further, the step of obtaining the total amount of the formaldehyde column of the observation troposphere in each satellite cell by using the satellite remote sensing platform specifically comprises the following steps:
acquiring the total amount of formaldehyde columns of an observation troposphere in a target area by using a satellite remote sensing platform;
and converting the total amount of the observed tropospheric formaldehyde columns in the target area into the total amount of the observed tropospheric formaldehyde columns in each satellite cell by an area weighting method.
Further, the step of screening out a plurality of target model cells corresponding to a plurality of satellite cells by using an atmospheric gas transmission model, and obtaining the total amount of the simulated tropospheric formaldehyde column in each target model cell and the total amount of the simulated boundary layer formaldehyde column in each target model cell specifically comprises the following steps:
judging whether the area of the target model cell is larger than the area of the satellite cell or not;
if the area of the target model cell is smaller than that of the satellite cell, screening out a first model cell contained in each satellite cell;
obtaining the total amount of the simulated tropospheric formaldehyde column in each first model cell and the total amount of the simulated boundary layer formaldehyde column in each first model cell by using an atmospheric gas transmission model;
The step of calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a preset calculation rule based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each target model cell and the simulated boundary layer formaldehyde column total amount in each target model cell, specifically comprises the following steps:
and respectively calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell by a second preset algorithm based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each first model cell contained in each satellite cell and the simulated boundary layer formaldehyde column total amount in each first model cell contained in each satellite cell.
Further, the step of screening out a plurality of target model cells corresponding to a plurality of satellite cells by using an atmospheric gas transmission model, and obtaining the total amount of the simulated tropospheric formaldehyde column in each target model cell and the total amount of the simulated boundary layer formaldehyde column in each target model cell specifically comprises the following steps:
Judging whether the area of the target model cell is larger than the area of the satellite cell or not;
if the area of the target model cell is equal to the area of the satellite cell, screening out second model cells corresponding to each satellite cell one by one;
obtaining the total amount of the simulated tropospheric formaldehyde column in each second model cell and the total amount of the simulated boundary layer formaldehyde column in each second model cell by using an atmospheric gas transmission model;
the step of calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a preset calculation rule based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each target model cell and the simulated boundary layer formaldehyde column total amount in each target model cell, specifically comprises the following steps:
and respectively calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a third preset algorithm based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each second model cell and the simulated boundary layer formaldehyde column total amount in each second model cell.
Further, the step of screening out a plurality of target model cells corresponding to a plurality of satellite cells by using an atmospheric gas transmission model, and obtaining the total amount of the simulated tropospheric formaldehyde column in each target model cell and the total amount of the simulated boundary layer formaldehyde column in each target model cell specifically comprises the following steps:
judging whether the area of the target model cell is larger than the area of the satellite cell or not;
screening out a plurality of third model cells comprising all the satellite cells if the area of the target model cell is larger than the area of the satellite cell; wherein each of the third model cells includes at least one of the satellite cells;
obtaining the total amount of the simulated tropospheric formaldehyde column in each third model cell and the total amount of the simulated boundary layer formaldehyde column in each third model cell;
the step of calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a preset calculation rule based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each target model cell and the simulated boundary layer formaldehyde column total amount in each target model cell, specifically comprises the following steps:
And respectively calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a fourth preset algorithm based on the simulated tropospheric formaldehyde column total amount in each third model cell, the simulated boundary layer formaldehyde column total amount in each third model cell and the observed tropospheric formaldehyde column total amount in each satellite cell.
Further, the step of calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a fourth preset algorithm based on the simulated tropospheric formaldehyde column total amount in each third model cell, the simulated boundary layer formaldehyde column total amount in each third model cell, and the observed tropospheric formaldehyde column total amount in each satellite cell included in each third model cell, specifically includes:
performing linear fitting on the total amount of the observed tropospheric formaldehyde columns in each satellite cell contained in each third model cell, and respectively obtaining a fitting result based on each third model cell;
based on the total amount of the simulated tropospheric formaldehyde column in each third model cell and the fitting result corresponding to each third model cell, respectively calculating the total amount of the simulated and corrected tropospheric formaldehyde column in each satellite cell according to a fifth preset algorithm;
Calculating the total amount of the simulated correction boundary layer formaldehyde columns in each satellite cell according to a sixth preset algorithm based on the total amount of the simulated correction tropospheric formaldehyde columns in each satellite cell, the total amount of the simulated tropospheric formaldehyde columns in each third model cell and the total amount of the simulated boundary layer formaldehyde columns in each third model cell;
and respectively calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a seventh preset algorithm based on the simulated correction tropospheric formaldehyde column total amount in each satellite cell, the simulated correction boundary layer formaldehyde column total amount in each satellite cell and the observed tropospheric formaldehyde column total amount in each satellite cell.
Further, after the step of calculating the theoretical total amount of the boundary layer formaldehyde column in each satellite cell according to a seventh preset algorithm, the method further comprises the following steps:
Obtaining the total amount of the simulated near-ground formaldehyde columns in each third model cell by using an atmospheric gas transmission model;
based on the total amount of the simulated correction tropospheric formaldehyde columns in each satellite cell, the total amount of the simulated tropospheric formaldehyde columns in each third model cell and the total amount of the simulated near-ground formaldehyde columns in each third model cell, respectively calculating the total amount of the simulated correction near-ground formaldehyde columns in each satellite cell according to an eighth preset algorithm;
calculating the theoretical lowest formaldehyde column total amount in each satellite cell according to a ninth preset algorithm based on the simulated correction tropospheric formaldehyde column total amount in each satellite cell, the simulated correction near-ground formaldehyde column total amount in each satellite cell and the observed tropospheric formaldehyde column total amount in each satellite cell;
the method comprises the steps of obtaining the pressure difference between a boundary layer and near ground, respectively calculating the first theoretical near ground formaldehyde concentration in each satellite cell according to a first preset algorithm based on the total amount of theoretical boundary layer formaldehyde columns in each satellite cell, and further comprises the following steps:
Acquiring pressure difference between the lowest layer and the near ground by using an atmospheric chemical transmission model, and respectively calculating second theoretical near ground formaldehyde concentration in each satellite cell according to the first preset algorithm based on the total amount of theoretical lowest layer formaldehyde columns in each satellite cell;
calculating a concentration deviation value according to a tenth preset algorithm based on the second theoretical near-surface formaldehyde concentration in each satellite cell and the first theoretical near-surface formaldehyde concentration in each satellite cell;
judging whether the total amount of formaldehyde columns of an observation troposphere in each satellite cell is larger than a first threshold value;
if the total amount of the formaldehyde columns of the observed troposphere in the satellite cells is larger than the first threshold value, calculating the third theoretical near-ground formaldehyde concentration in the satellite cells according to an eleventh preset algorithm based on the first theoretical near-ground formaldehyde concentration in the satellite cells and the concentration deviation value.
Further, after the step of determining whether the total amount of the formaldehyde columns of the observed troposphere in each satellite cell is greater than a first threshold, the method further includes the following steps:
if the total amount of the formaldehyde columns of the observation troposphere in the satellite unit cells is not more than the first threshold value, judging whether the total amount of the formaldehyde columns of the observation troposphere in the satellite unit cells is more than a second threshold value or not;
If the total amount of the observed tropospheric formaldehyde columns in the satellite cells is greater than the second threshold, a fourth theoretical near-ground formaldehyde concentration in the satellite cells is calculated according to a twelfth preset algorithm based on the first theoretical near-ground formaldehyde concentration in the satellite cells, the total amount of the observed tropospheric formaldehyde columns in the satellite cells, and the concentration deviation value.
Correspondingly, the invention also provides a near-ground formaldehyde concentration acquisition system based on the satellite remote sensing technology, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the computer program is executed by the processor to realize the steps of the near-ground formaldehyde concentration acquisition method based on the satellite remote sensing technology.
Correspondingly, the invention also provides a computer readable storage medium, wherein the computer readable storage medium is stored with a near-ground formaldehyde concentration acquisition program based on the satellite remote sensing technology, and the near-ground formaldehyde concentration acquisition program based on the satellite remote sensing technology realizes the steps of the near-ground formaldehyde concentration acquisition method based on the satellite remote sensing technology when being executed by a processor.
Compared with the prior art, the invention has the beneficial effects that:
according to the near-ground formaldehyde concentration obtaining method based on the satellite remote sensing technology, a target area is divided into a plurality of satellite cells through satellite remote sensing, the total amount of the observed troposphere formaldehyde columns in one group of satellite cells (one or more satellite cells) is firstly observed, one group of target model cells (one or more satellite cells) corresponding to the group of satellite cells are screened out through an atmospheric chemical transmission model, the total amount of the simulated troposphere formaldehyde columns and the total amount of the simulated boundary layer formaldehyde columns in the group of target model cells are simulated, the total amount of the observed troposphere formaldehyde columns in the group of satellite cells is adjusted according to the mapping relation between the two to obtain the total amount of the theoretical boundary layer formaldehyde columns in each satellite cell, and finally the first theoretical near-ground formaldehyde concentration in each satellite cell of the group is calculated based on the pressure difference between the boundary layer and the near ground. And for other satellite cells, the calculation is performed in the same way, so that the first theoretical near-ground formaldehyde concentration in all satellite cells can be finally obtained. The method solves the problem that the total formaldehyde column amount of the troposphere can only be observed through the satellite remote sensing technology at present, and the formaldehyde concentration obtained according to the total formaldehyde column amount can not accurately represent the near-ground formaldehyde concentration, and obtains relatively accurate near-ground formaldehyde concentration data through the combination of the satellite remote sensing technology and an atmospheric gas transmission model.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a first embodiment of a near-surface formaldehyde concentration acquisition method according to the present invention;
FIG. 2 is a schematic diagram of a partial flow chart of a second embodiment of a near-surface formaldehyde concentration acquisition method according to the present invention;
FIG. 3 is a schematic view of a portion of a process for obtaining formaldehyde concentration near the ground according to a third embodiment of the present invention;
FIG. 4 is a schematic view of a portion of a flow chart of a fourth embodiment of a near-surface formaldehyde concentration obtaining method according to the present invention;
FIG. 5 is a schematic view of a portion of a flow chart of a fifth embodiment of a near-surface formaldehyde concentration obtaining method according to the present invention;
FIG. 6 is a schematic diagram of a portion of a process for obtaining formaldehyde concentration near the ground according to a sixth embodiment of the invention;
FIG. 7 is a schematic view of a portion of a process flow of a seventh embodiment of a near-surface formaldehyde concentration obtaining method according to the present invention;
FIG. 8 is a schematic view of a partial flow chart of an eighth embodiment of a near-surface formaldehyde concentration acquisition method according to the present invention;
FIG. 9 is a schematic diagram of a comparison of satellite cells and target model cells according to an embodiment of the present invention;
fig. 10 is a schematic system architecture diagram of a hardware running environment according to an embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it should be understood that the specific embodiments described herein are only for explaining the present invention and are not limited thereto. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 10, fig. 10 is a schematic structural diagram of a near-ground formaldehyde concentration obtaining system based on a satellite remote sensing technology according to an embodiment of the present invention.
As shown in fig. 10, the near-ground formaldehyde concentration acquisition system based on the satellite remote sensing technology may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
Optionally, the near-ground formaldehyde concentration acquisition system based on the satellite remote sensing technology may further include a camera, an RF (radio frequency) circuit, a sensor, an audio circuit, a WiFi module, and the like. The sensor may include a light sensor, a motion sensor, an infrared sensor, and other sensors, which will not be described herein.
Those skilled in the art will appreciate that the particular configuration shown in FIG. 10 is not limiting of the satellite remote sensing technology based near-ground formaldehyde concentration acquisition system and may include more or fewer components than shown, or may be a combination of certain components, or a different arrangement of components.
As shown in fig. 10, an operating system, a network communication module, a user interface module, and a near-surface formaldehyde concentration acquisition program based on satellite remote sensing technology may be included in the memory 1005 as a computer readable storage medium.
In the near-ground formaldehyde concentration acquisition system based on the satellite remote sensing technology shown in fig. 10, the network interface 1004 is mainly used for connecting a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to invoke the near-surface formaldehyde concentration obtaining program based on the satellite remote sensing technology stored in the memory 1005 and perform the operations in the near-surface formaldehyde concentration obtaining method based on the satellite remote sensing technology in any of the embodiments described below.
Based on the hardware structure, the embodiment of the near-ground formaldehyde concentration acquisition method based on the satellite remote sensing technology is provided.
Referring to fig. 1, a first embodiment of the present invention provides a near-ground formaldehyde concentration obtaining method based on a satellite remote sensing technology, which includes:
step S1, dividing a plurality of satellite cells by using a satellite remote sensing platform;
s2, acquiring the total amount of formaldehyde columns of an observation troposphere in each satellite cell by using a satellite remote sensing platform;
the satellite remote sensing platform specifically comprises a hyperspectral satellite (such as a satellite-borne spectrometer TROPOMI transmitted in 2017) capable of being used for observing the air condition of the troposphere and a ground workbench capable of realizing communication with the satellite and acquiring satellite remote sensing observation data, wherein the specific observation mode is based on the lambert law and a differential absorption spectrum method, and the absorption signal of atmospheric formaldehyde is extracted from the spectrum observed by the satellite, so that the total amount of formaldehyde columns in the atmospheric troposphere is remotely sensed. During observation, the satellite firstly divides the target area into a plurality of satellite cells, namely the minimum unit (which can be understood as pixel points in image processing) of the total amount of the tropospheric formaldehyde columns in the target area. And after the ground workbench acquires the total amount of the observed troposphere formaldehyde columns in all satellite cells, judging the total amount of the observed troposphere formaldehyde columns in the target area. The size of the satellite cells is related to the spatial resolution of the satellite, and the larger the resolution is, the smaller the size of the single satellite cells, whereas when the resolution is smaller, the larger the size of the single satellite cells is, in practical applications, the satellite cells can be scaled by adjusting the spatial resolution of the satellite.
Step S3, screening out a plurality of target model cells corresponding to a plurality of satellite cells by using an atmospheric gas transmission model, and obtaining the total amount of the simulated troposphere formaldehyde column in each target model cell and the total amount of the simulated boundary layer formaldehyde column in each target model cell;
the atmospheric chemical transmission model may specifically be a radiation transmission model GEOS-Chem by which the vertical profile of formaldehyde, the total amount of formaldehyde columns in the convection layer, and the total amount of formaldehyde columns in the boundary layer can be simulated in software. Similar to the satellite cell, the model cell, the atmospheric transport model, is used to model the smallest unit of the total formaldehyde column in the target area (which can be understood as the pixel point in image processing). When the resolution of the atmospheric transmission model is higher than the spatial resolution of the satellite, the area of a single model cell is smaller than that of a single satellite cell; when the resolution of the atmospheric transmission model is equal to the spatial resolution of the satellite, the area of a single model cell is equal to the area of a single satellite cell; when the resolution of the atmospheric transmission model is lower than the spatial resolution of the satellite, the area of the individual model cells is larger than the area of the individual satellite cells.
Screening a plurality of target model cells corresponding to the plurality of satellite cells, namely screening a group of target model cells (one or more) corresponding to one group of satellite cells for the plurality of satellite cells (one or more), acquiring the total amount of the observed tropospheric formaldehyde column of the group of satellite cells, the total amount of the simulated tropospheric formaldehyde column and the total amount of the simulated boundary layer formaldehyde column of the group of target model cells, and reserving the three groups of data as subsequent calculation of the group of satellite cells; and then, the same operation of screening the target model cells is executed for another group of satellite cells (one or more satellite cells can be used) until all satellite cells needing to acquire the near-ground formaldehyde concentration through the technical scheme of the invention are executed.
It should be noted that "corresponding" in the above description may include, but is not limited to, the following cases: screening a plurality of target model cells contained in one satellite cell (see view (a) in fig. 9); or screening out a target model cell which is equal in size to a satellite cell and coincides with the satellite cell (see view (b) in fig. 9); or screening out one target model cell including a plurality of satellite cells for the plurality of satellite cells (see view (c) in fig. 9).
Step S4, calculating the total amount of theoretical boundary layer formaldehyde columns in each satellite cell according to a preset calculation rule based on the total amount of the observed tropospheric formaldehyde columns in each satellite cell, the total amount of the simulated tropospheric formaldehyde columns in each target model cell and the total amount of the simulated boundary layer formaldehyde columns in each target model cell;
the total amount of the troposphere formaldehyde column can be observed only through a satellite remote sensing mode, and in order to further obtain the total amount of the boundary layer formaldehyde column for calculating the near-ground formaldehyde concentration through the observed total amount of the troposphere formaldehyde column, the total amount of the troposphere formaldehyde column and the total amount of the boundary layer formaldehyde column which are simulated through an atmospheric chemical transmission simulation can be utilized, and the simulated total amount of the troposphere formaldehyde column and the simulated total amount of the boundary layer formaldehyde column are both simulation results, so that the actual accuracy is lower, but the simulated total amount of the troposphere formaldehyde column is simulated based on the same model, and the observed total amount of the troposphere formaldehyde column can be adjusted according to the mapping relation between the simulated total amount of the troposphere formaldehyde column and the boundary layer formaldehyde column, so that the accurate theoretical total amount of the boundary layer formaldehyde column is obtained. The preset calculation rule is based on a mode of firstly obtaining a mapping relation between the total amount of the simulated tropospheric formaldehyde column and the total amount of the simulated boundary layer formaldehyde column in a target model cell (one or more) corresponding to a certain group of satellite cells (one or more), and then adjusting the total amount of the observed tropospheric formaldehyde column in the group of satellite cells according to the mapping relation, so as to finally obtain the theoretical boundary layer formaldehyde column total amount in each satellite cell.
And S5, acquiring the pressure difference between the boundary layer and the near-ground, and respectively calculating the first theoretical near-ground formaldehyde concentration in each satellite cell according to a first preset algorithm based on the total amount of the theoretical boundary layer formaldehyde columns in each satellite cell.
Specifically, the pressure difference between the boundary layer and the near-surface can be directly obtained through an atmospheric chemical transmission model.
For convenience of explanation, the subsequent calculation process is set to have the satellite cell j and the model cell g. The first preset algorithm is specifically the following calculation formula:
wherein C (j) is the first theoretical near-ground formaldehyde concentration in satellite cell j, V s (j) The delta P is the pressure difference (in hundred Pa) between the boundary layer and the near ground, 1013.25HPA is the standard atmospheric pressure, 30 is the formaldehyde molecular weight, 24.45 is the atmospheric molecular weight, and 1.251 is the relevant calculation parameter.
For the first theoretical near-ground formaldehyde concentration in other satellite cells, the obtaining and calculating modes follow the above steps, and are not repeated here.
It can be seen that, in the near-ground formaldehyde concentration obtaining method based on the satellite remote sensing technology provided in this embodiment, the target area is divided into a plurality of satellite cells by satellite remote sensing, the total amount of the observed troposphere formaldehyde column in one group of satellite cells (may be one or more) is firstly observed, then a group of target model cells (may be one or more) corresponding to the group of satellite cells is screened out through the atmospheric chemical transmission model, the total amount of the simulated troposphere formaldehyde column and the total amount of the simulated boundary layer formaldehyde column in the group of target model cells are simulated, then the total amount of the observed troposphere formaldehyde column in the group of satellite cells is adjusted according to the mapping relation between the two to obtain the total amount of the theoretical boundary layer formaldehyde column in each satellite cell, and finally the first theoretical near-ground formaldehyde concentration in each satellite cell is calculated based on the pressure difference between the boundary layer and the near-ground. And for other satellite cells, the calculation is performed in the same way, so that the first theoretical near-ground formaldehyde concentration in all satellite cells can be finally obtained. The method solves the problem that the total formaldehyde column amount of the troposphere can only be observed through the satellite remote sensing technology at present, and the formaldehyde concentration obtained according to the total formaldehyde column amount can not accurately represent the near-ground formaldehyde concentration, and obtains relatively accurate near-ground formaldehyde concentration data through the combination of the satellite remote sensing technology and an atmospheric gas transmission model.
Further, referring to fig. 2, a second embodiment of the present invention provides a method for obtaining a near-ground formaldehyde concentration based on a satellite remote sensing technology, based on the first embodiment shown in fig. 1, step S2 specifically includes:
s21, acquiring the total amount of formaldehyde columns of an observation troposphere in a target area by using a satellite remote sensing platform;
and S22, converting the total amount of the formaldehyde column of the observed troposphere in the target area into the total amount of the formaldehyde column of the observed troposphere in each satellite cell by an area weighting method.
The original pixels of the satellite remote sensing are irregular, the satellite cells in the previous embodiment are regular grid points formed by converting the satellite pixels, and for a specific conversion mode, the embodiment provides an area weighting method, and the irregular satellite original pixels are compressed into regular satellite cells with smaller areas by the area weighting method, so that the satellite resolution is improved, and errors caused by the compression process are reduced. Specifically, the resolution of the on-board spectrometer TROPOMI is about 0.035 ° (latitude) by 0.055 ° (longitude), so that in practical application, the satellite original pixels can be compressed into satellite cells with an area of 0.02 ° (latitude) by 0.02 ° (longitude) by an area weighting method.
The calculation formula related to the area weighting method is as follows:
wherein V (j) is the total amount of the observed tropospheric formaldehyde columns of the satellite cell j, N (j) is the total number of satellite pixels intersecting the satellite cell j, i represents the ith pixel, A (i, j) represents the overlapping area of the pixel i and the satellite cell j, A (i) represents the total area of the pixel i (if the pixel i is on the boundary of the satellite cell j and partially overlaps the satellite cell j, A (i, j) is smaller than A (i), if the pixel i is completely contained in the satellite cell j, A (i, j) is equal to A (i)), sigma (i) is the ratio of the inversion error of the pixel i to the total amount of the inversion columns, CF (i) is the cloud amount of the pixel i, and V (i) is the total amount of the observed tropospheric formaldehyde columns of the pixel i.
Further, referring to fig. 3, a third embodiment of the present invention provides a method for obtaining a near-ground formaldehyde concentration based on a satellite remote sensing technology, based on the first embodiment shown in fig. 1, step S3 specifically includes:
step S31, judging whether the area of the target model cell is larger than the area of the satellite cell;
step S32, if the area of the target model cell is smaller than that of the satellite cell, screening out a first model cell contained in each satellite cell;
And step S33, obtaining the total amount of the simulated tropospheric formaldehyde columns in each first model cell and the total amount of the simulated boundary layer formaldehyde columns in each first model cell by using an atmospheric chemical transmission model.
The step S4 specifically comprises the following steps:
step S41, calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a second preset algorithm based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each first model cell contained in each satellite cell and the simulated boundary layer formaldehyde column total amount in each first model cell contained in each satellite cell.
When the resolution of the atmospheric chemical transmission model is higher than the spatial resolution of the satellite, the area of the single model cell is smaller than that of the single satellite cell, and as shown in view (a) of fig. 9, a plurality of target model cells (referred to herein as first model cells) are included in one satellite cell, and the included plurality of first model cells can jointly represent the formaldehyde vertical distribution state in the satellite cell. Specifically, the calculation formula of the second preset algorithm is as follows:
Wherein V is s (j) Is the total amount of theoretical boundary layer formaldehyde columns in the satellite unit cell j, V (j) is the total amount of observed troposphere formaldehyde columns in the satellite unit cell j, V s,w (g) The total amount of simulated boundary layer formaldehyde columns, V, within each first model cell g contained by satellite cell j w (g) The total amount of simulated tropospheric formaldehyde columns in each first model cell g contained in satellite cell j.
Further, referring to fig. 4, a fourth embodiment of the present invention provides a method for obtaining a near-ground formaldehyde concentration based on a satellite remote sensing technology, based on the first embodiment shown in fig. 1, step S3 specifically includes:
step S34, judging whether the area of the target model cell is larger than the area of the satellite cell;
step S35, if the area of the target model cell is equal to the area of the satellite cell, screening out second model cells corresponding to each satellite cell one by one;
and S36, obtaining the total amount of the simulated tropospheric formaldehyde columns in each second model cell and the total amount of the simulated boundary layer formaldehyde columns in each second model cell by using the atmospheric chemical transmission model.
The step S4 specifically comprises the following steps:
step S42, calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a third preset algorithm based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each second model cell and the simulated boundary layer formaldehyde column total amount in each second model cell.
When the resolution of the atmospheric chemical transmission model is equal to the spatial resolution of the satellite, the area of the individual model cell is equal to the area of the individual satellite cell, as shown in view (b) of fig. 9, when the individual satellite cell overlaps with the individual target model cell (referred to herein as the second model cell), then the second model cell may characterize the formaldehyde vertical distribution within the satellite cell. Specifically, the calculation formula of the third preset algorithm is as follows:
wherein V is s (j) Is the total amount of theoretical boundary layer formaldehyde columns in the satellite unit cell j, V (j) is the total amount of observed troposphere formaldehyde columns in the satellite unit cell j, V s,w (g) For the total amount of simulated boundary layer formaldehyde columns in the second model cell g matched (overlapped) with the longitude and latitude of the satellite cell j, V w (g) The total amount of simulated tropospheric formaldehyde columns in the second model cell g matched (overlapping) with the longitude and latitude of the satellite cell j.
Further, referring to fig. 5, a fifth embodiment of the present invention provides a method for obtaining a near-ground formaldehyde concentration based on satellite remote sensing technology, based on the first embodiment shown in fig. 1, step S3 specifically includes:
step S37, judging whether the area of the target model cell is larger than the area of the satellite cell;
Step S38, screening out a plurality of third model cells containing all satellite cells if the area of the target model cell is larger than that of the satellite cell; wherein each third model cell comprises at least one satellite cell;
and S39, obtaining the total amount of the simulated tropospheric formaldehyde columns in each third model cell and the total amount of the simulated boundary layer formaldehyde columns in each third model cell by using the atmospheric chemical transmission model.
The step S4 specifically comprises the following steps:
step S43, calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a fourth preset algorithm based on the simulated tropospheric formaldehyde column total amount in each third model cell, the simulated boundary layer formaldehyde column total amount in each third model cell and the observed tropospheric formaldehyde column total amount in each satellite cell.
When the resolution of the atmospheric chemical transmission model is lower than the spatial resolution of the satellite, the area of the single model cell is larger than that of the single satellite cell, as shown in view (c) of fig. 9, where one target model cell (referred to herein as a third model cell) contains multiple satellite cells, and the third model cell cannot characterize the formaldehyde vertical distribution state in the multiple satellite cells contained therein. In this case, V in the third preset algorithm needs to be set by the fourth preset algorithm s,w (g) And V w (g) And correcting, and calculating by a third preset algorithm to obtain the total amount of the theoretical boundary layer formaldehyde columns accurately contained in each satellite cell in the third model cell. Specifically, the fourth preset algorithm may calculate V in the third preset algorithm based on a mapping relationship between the total amount of the observed tropospheric formaldehyde columns in each of the satellite cells included in the third model cell and the total amount of the observed tropospheric formaldehyde columns in all of the satellite cells included in the third model cell s,w (g) And V w (g) And (5) performing correction.
Further, referring to fig. 6, a method for obtaining near-ground formaldehyde concentration based on satellite remote sensing technology is provided according to a sixth embodiment of the present invention, based on the fifth embodiment shown in fig. 5, step S43 specifically includes:
step S431, performing linear fitting on the total amount of the observed tropospheric formaldehyde columns in each satellite cell contained in each third model cell, and respectively obtaining a fitting result based on each third model cell;
step S432, based on the total amount of the simulated tropospheric formaldehyde columns in each third model cell and the fitting result corresponding to each third model cell, respectively calculating the total amount of the simulated corrected tropospheric formaldehyde columns in each satellite cell according to a fifth preset algorithm;
Step S433, calculating the total amount of the simulated correction boundary layer formaldehyde column in each satellite cell according to a sixth preset algorithm based on the total amount of the simulated correction tropospheric formaldehyde column in each satellite cell, the total amount of the simulated tropospheric formaldehyde column in each third model cell and the total amount of the simulated boundary layer formaldehyde column in each third model cell;
step S434, calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to the seventh preset algorithm based on the simulated correction tropospheric formaldehyde column total amount in each satellite cell, the simulated correction boundary layer formaldehyde column total amount in each satellite cell, and the observed tropospheric formaldehyde column total amount in each satellite cell.
The linear fitting in this embodiment is specifically performed based on the average value of the total amount of the observed tropospheric formaldehyde columns in each of the satellite cells included in the third model cell and the total amount of the observed tropospheric formaldehyde columns in all of the satellite cells included in the third model cell, so as to obtain the correspondence relationship between the two.
The calculation formula of the fifth preset algorithm is as follows:
V w ′(j)＝F(j)*V w (g)
wherein V is w ' (j) is contained in the third model cellThe total amount of the simulated correction tropospheric formaldehyde column in each satellite cell j in g, F (j) is the corresponding relation of the total amount of the observed tropospheric formaldehyde column between each satellite cell j contained in the third model cell g and all satellite cells contained in the third model cell g obtained by the above linear fitting, V w (g) The total amount of simulated tropospheric formaldehyde columns in the third model cell g.
The calculation formula of the sixth preset algorithm is as follows:
V s,w ′(j)＝V w ′(j)-(V w (g)-V s,w (g))
wherein V is s,w ' (j) is the simulated corrected boundary layer formaldehyde column total, V, in each satellite cell j contained in the third model cell g w ' j is the total amount of simulated corrected tropospheric formaldehyde column in each satellite cell j contained in the third model cell g, V w (g) For the total amount of simulated tropospheric formaldehyde column in the third model cell g, V s,w (g) The total amount of the simulated boundary layer formaldehyde column in the third model cell g.
Combining the fifth preset algorithm and the sixth preset algorithm to obtain a seventh preset algorithm, wherein the calculation formula of the seventh preset algorithm is as follows:
wherein V is s (j) V (j) is the observed total amount of tropospheric formaldehyde columns contained in each satellite cell j in the third model cell g, which is the theoretical total amount of boundary layer formaldehyde columns contained in each satellite cell j in the third model cell g.
Further, referring to fig. 7, a seventh embodiment of the present invention provides a method for obtaining a near-ground formaldehyde concentration based on satellite remote sensing technology, based on the sixth embodiment shown in fig. 6, the method further includes, after step S434:
step S435, obtaining the total amount of the simulated near-ground formaldehyde columns in each third model cell by using the atmospheric chemical transmission model;
step S436, based on the total amount of the simulated correction tropospheric formaldehyde columns in each satellite cell, the total amount of the simulated tropospheric formaldehyde columns in each third model cell and the total amount of the simulated near-ground formaldehyde columns in each third model cell, respectively calculating the total amount of the simulated correction near-ground formaldehyde columns in each satellite cell according to an eighth preset algorithm;
step S437, calculating the theoretical lowest formaldehyde column total amount in each satellite cell according to a ninth preset algorithm based on the simulated correction tropospheric formaldehyde column total amount in each satellite cell, the simulated correction near-ground formaldehyde column total amount in each satellite cell and the observed tropospheric formaldehyde column total amount in each satellite cell.
Based on the first embodiment shown in fig. 1, step S5 further includes:
S6, acquiring the pressure difference between the lowest layer and the near ground by using an atmospheric chemical transmission model, and respectively calculating the second theoretical near ground formaldehyde concentration in each satellite cell according to a first preset algorithm based on the total amount of the theoretical lowest layer formaldehyde column in each satellite cell;
step S7, calculating a concentration deviation value according to a tenth preset algorithm based on the second theoretical near-ground formaldehyde concentration in each satellite cell and the first theoretical near-ground formaldehyde concentration in each satellite cell;
s8, judging whether the total amount of formaldehyde columns of the observation troposphere in each satellite cell is larger than a first threshold value;
step S9, if the total amount of the formaldehyde columns of the observed troposphere in the satellite cells is larger than a first threshold value, calculating the third theoretical near-ground formaldehyde concentration in the satellite cells according to an eleventh preset algorithm based on the first theoretical near-ground formaldehyde concentration in the satellite cells and the concentration deviation value.
The seventh preset algorithm in the above embodiment is only suitable for the situation that no high concentration formaldehyde is discharged and formaldehyde is uniformly distributed in the boundary layer, but in a factory or a densely populated area, formaldehyde is mainly accumulated near the ground, and in this case, the theoretical total amount of the boundary layer formaldehyde column calculated by adopting the seventh preset algorithm cannot accurately reflect the actual situation, and the formaldehyde concentration near the ground may be underestimated, so that further correction of the seventh preset algorithm is required. Specifically, the calculation formula of the eighth preset algorithm is as follows:
V p,w ′(j)＝V w ′(j)-(V w (g)-V p,w (g))
Wherein V is p,w ' (j) is the simulated corrected near-ground formaldehyde column inventory, V, in each satellite cell j contained in the third model cell g w ' j is the total amount of simulated corrected tropospheric formaldehyde column in each satellite cell j contained in the third model cell g, V w (g) For the total amount of simulated tropospheric formaldehyde column in the third model cell g, V p,w (g) The total amount of simulated near-surface formaldehyde columns in the third model cell g obtained by using the atmospheric gas transmission model.
In combination with the eighth preset algorithm, and the fifth preset algorithm, the sixth preset algorithm, and the seventh preset algorithm in the previous embodiment, a ninth preset algorithm may be obtained, where a calculation formula of the ninth preset algorithm is as follows:
wherein V is p ' j is the theoretical lowest layer formaldehyde column total contained in each satellite cell j in the third model cell g, and V (j) is the observed tropospheric formaldehyde column total contained in each satellite cell j in the third model cell g.
Theoretical lowest total formaldehyde column V in each satellite cell in obtaining the third model cell p After the step (j), a second theoretical near-surface formaldehyde concentration C' (j) in each satellite cell in the third model cell is calculated according to a first preset algorithm in the first embodiment, wherein Δp in the first preset algorithm is changed into a pressure difference between the lowest layer and the near-surface.
And for the sixth embodiment by a seventh preset algorithmTheoretical boundary layer formaldehyde column total V contained in each satellite cell in the third model cell s (j) The first theoretical near-surface formaldehyde concentration C (j) in each satellite cell in the third model cell is also calculated according to the first preset algorithm in the first embodiment, wherein Δp in the first preset algorithm is the pressure difference between the boundary layer and the near-surface.
After C' (j) and C (j) are calculated, the concentration deviation value of formaldehyde near the ground is calculated through a tenth preset algorithm. Specifically, the calculation formula of the tenth preset algorithm is as follows:
wherein Mean (Σc' (j)) is the average value of the addition of the second theoretical near-surface formaldehyde concentration in each satellite cell in the third model cell, mean (Σc (j)) is the average value of the addition of the first theoretical near-surface formaldehyde concentration in each satellite cell in the third model cell, and the concentration deviation value k (g) is the ratio of the two, and is characterized by assuming that the formaldehyde is uniformly distributed in the boundary layer. The ideal near-surface formaldehyde concentration calculated according to the seventh preset algorithm and the first preset algorithm under the condition of larger actual deviation can be corrected through the concentration deviation value, so that the more accurate near-surface formaldehyde concentration is obtained.
The first threshold may be specifically set to 15×10 16 Number of molecules/cm 2 When the total amount of the formaldehyde column of the observed troposphere in one of the satellite cells in the third model cell is larger than the first threshold, the deviation of the formaldehyde concentration near the ground in the satellite cell is larger, and at the moment, the third theoretical near-ground formaldehyde concentration in the satellite cell is calculated again by adopting an eleventh preset algorithm so as to replace the first theoretical near-ground formaldehyde concentration which is inaccurate under the deviation, and the final result is obtained.
Specifically, the calculation formula of the eleventh preset algorithm is as follows:
C″(j)＝k(g)×C(j)
wherein C' (j) is the third theoretical near-ground formaldehyde concentration in the satellite cell j, C (j) is the first theoretical near-ground formaldehyde concentration in the satellite cell j, and k (g) is the concentration deviation value.
Further, referring to fig. 8, an eighth embodiment of the present invention provides a method for obtaining a near-ground formaldehyde concentration based on satellite remote sensing technology, based on the seventh embodiment shown in fig. 7, after step S8, further including:
step S10, if the total amount of the formaldehyde columns of the observation troposphere in the satellite unit cells is not more than a first threshold value, judging whether the total amount of the formaldehyde columns of the observation troposphere in the satellite unit cells is more than a second threshold value;
Step S11, if the total amount of the observed tropospheric formaldehyde columns in the satellite cells is greater than a second threshold, a fourth theoretical near-ground formaldehyde concentration in the satellite cells is calculated according to a twelfth preset algorithm based on the first theoretical near-ground formaldehyde concentration in the satellite cells, the total amount of the observed tropospheric formaldehyde columns in the satellite cells, and the concentration deviation value.
The second threshold may be specifically set to 5×10 15 Number of molecules/cm 2 When the total amount of the formaldehyde column of the observed troposphere in one of the satellite cells in the third model cell is larger than the second threshold value and not larger than the first threshold value, the deviation of the formaldehyde concentration near the ground in the satellite cell is indicated, and at the moment, the fourth theoretical near-ground formaldehyde concentration in the satellite cell is calculated again by adopting a twelfth preset algorithm so as to replace the first theoretical near-ground formaldehyde concentration which is inaccurate under the deviation, and the fourth theoretical near-ground formaldehyde concentration is taken as a final result.
Specifically, the calculation formula of the twelfth preset algorithm is as follows:
wherein, C' (j) is the fourth theoretical near-ground formaldehyde concentration in the satellite cell j, C (j) is the first theoretical near-ground formaldehyde concentration in the satellite cell j, V (j) is the total amount of the observed tropospheric formaldehyde column in the satellite cell j, and k (g) is the concentration deviation value.
It should be noted that, when the total amount of the formaldehyde column in the troposphere observed in one of the satellite cells in the third model cell is not greater than the second threshold, it is indicated that the deviation of the formaldehyde concentration near the ground in the satellite cell is negligible, and the first theoretical near-ground formaldehyde concentration can be directly used as the final result.
Correspondingly, the embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium is stored with a near-ground formaldehyde concentration acquisition program based on the satellite remote sensing technology, and the near-ground formaldehyde concentration acquisition program based on the satellite remote sensing technology realizes the steps of the near-ground formaldehyde concentration acquisition method based on the satellite remote sensing technology in any embodiment when being executed by a processor.
In the present embodiment, the above-mentioned computer readable storage medium may include, but is not limited to, any type of disk (including floppy disk, hard disk, optical disk, CD-ROM, and magneto-optical disk), ROM (Read-only memory), RAM (random access memory), EPROM (erasable programmable Read-only memory), EEPROM (electrically erasable programmable Read-only memory), flash memory, magnetic card, or optical card, and the like, and various media in which program codes may be stored.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a computer readable storage medium as described above, comprising several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (10)

1. The near-ground formaldehyde concentration acquisition method based on the satellite remote sensing technology is characterized by comprising the following steps of:
dividing a plurality of satellite cells by using a satellite remote sensing platform;
obtaining the total amount of formaldehyde columns of an observation troposphere in each satellite cell by using a satellite remote sensing platform;
screening a plurality of target model cells corresponding to a plurality of satellite cells by using an atmospheric gas transmission model, and obtaining the total amount of simulated troposphere formaldehyde columns in each target model cell and the total amount of simulated boundary layer formaldehyde columns in each target model cell;
based on the total amount of the observed tropospheric formaldehyde columns in each satellite cell, the total amount of the simulated tropospheric formaldehyde columns in each target model cell and the total amount of the simulated boundary layer formaldehyde columns in each target model cell, respectively calculating the total amount of the theoretical boundary layer formaldehyde columns in each satellite cell according to a preset calculation rule;
And acquiring the pressure difference between the boundary layer and the near-ground, and respectively calculating the first theoretical near-ground formaldehyde concentration in each satellite cell according to a first preset algorithm based on the total amount of the theoretical boundary layer formaldehyde columns in each satellite cell.
2. The method for obtaining near-ground formaldehyde concentration based on satellite remote sensing technology according to claim 1, wherein the step of obtaining the total amount of the observed tropospheric formaldehyde column in each satellite cell by using a satellite remote sensing platform specifically comprises:
acquiring the total amount of formaldehyde columns of an observation troposphere in a target area by using a satellite remote sensing platform;
and converting the total amount of the observed tropospheric formaldehyde columns in the target area into the total amount of the observed tropospheric formaldehyde columns in each satellite cell by an area weighting method.
3. The method for obtaining near-ground formaldehyde concentration based on satellite remote sensing technology according to claim 1, wherein the step of screening out a plurality of target model cells corresponding to a plurality of satellite cells by using an atmospheric transmission model, and obtaining the total amount of simulated tropospheric formaldehyde columns in each of the target model cells and the total amount of simulated boundary layer formaldehyde columns in each of the target model cells specifically comprises:
Judging whether the area of the target model cell is larger than the area of the satellite cell or not;
if the area of the target model cell is smaller than that of the satellite cell, screening out a first model cell contained in each satellite cell;
obtaining the total amount of the simulated tropospheric formaldehyde column in each first model cell and the total amount of the simulated boundary layer formaldehyde column in each first model cell by using an atmospheric gas transmission model;
the step of calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a preset calculation rule based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each target model cell and the simulated boundary layer formaldehyde column total amount in each target model cell, specifically comprises the following steps:
and respectively calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell by a second preset algorithm based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each first model cell contained in each satellite cell and the simulated boundary layer formaldehyde column total amount in each first model cell contained in each satellite cell.
4. The method for obtaining near-ground formaldehyde concentration based on satellite remote sensing technology according to claim 1, wherein the step of screening out a plurality of target model cells corresponding to a plurality of satellite cells by using an atmospheric transmission model, and obtaining the total amount of simulated tropospheric formaldehyde columns in each of the target model cells and the total amount of simulated boundary layer formaldehyde columns in each of the target model cells specifically comprises:
judging whether the area of the target model cell is larger than the area of the satellite cell or not;
if the area of the target model cell is equal to the area of the satellite cell, screening out second model cells corresponding to each satellite cell one by one;
obtaining the total amount of the simulated tropospheric formaldehyde column in each second model cell and the total amount of the simulated boundary layer formaldehyde column in each second model cell by using an atmospheric gas transmission model;
the step of calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a preset calculation rule based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each target model cell and the simulated boundary layer formaldehyde column total amount in each target model cell, specifically comprises the following steps:
And respectively calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a third preset algorithm based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each second model cell and the simulated boundary layer formaldehyde column total amount in each second model cell.
5. The method for obtaining near-ground formaldehyde concentration based on satellite remote sensing technology according to claim 1, wherein the step of screening out a plurality of target model cells corresponding to a plurality of satellite cells by using an atmospheric transmission model, and obtaining the total amount of simulated tropospheric formaldehyde columns in each of the target model cells and the total amount of simulated boundary layer formaldehyde columns in each of the target model cells specifically comprises:
judging whether the area of the target model cell is larger than the area of the satellite cell or not;
screening out a plurality of third model cells comprising all the satellite cells if the area of the target model cell is larger than the area of the satellite cell; wherein each of the third model cells includes at least one of the satellite cells;
Obtaining the total amount of the simulated tropospheric formaldehyde column in each third model cell and the total amount of the simulated boundary layer formaldehyde column in each third model cell by using an atmospheric gas transmission model;
the step of calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a preset calculation rule based on the observed tropospheric formaldehyde column total amount in each satellite cell, the simulated tropospheric formaldehyde column total amount in each target model cell and the simulated boundary layer formaldehyde column total amount in each target model cell, specifically comprises the following steps:
and respectively calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a fourth preset algorithm based on the simulated tropospheric formaldehyde column total amount in each third model cell, the simulated boundary layer formaldehyde column total amount in each third model cell and the observed tropospheric formaldehyde column total amount in each satellite cell.
6. The method for obtaining near-ground formaldehyde concentration based on satellite remote sensing technology according to claim 5, wherein the step of calculating the theoretical boundary layer formaldehyde column total amount in each of the satellite cells according to a fourth preset algorithm based on the simulated tropospheric formaldehyde column total amount in each of the third model cells, the simulated boundary layer formaldehyde column total amount in each of the third model cells, and the observed tropospheric formaldehyde column total amount in each of the satellite cells included in each of the third model cells, comprises:
Performing linear fitting on the total amount of the observed tropospheric formaldehyde columns in each satellite cell contained in each third model cell, and respectively obtaining a fitting result based on each third model cell;
based on the total amount of the simulated tropospheric formaldehyde column in each third model cell and the fitting result corresponding to each third model cell, respectively calculating the total amount of the simulated and corrected tropospheric formaldehyde column in each satellite cell according to a fifth preset algorithm;
calculating the total amount of the simulated correction boundary layer formaldehyde columns in each satellite cell according to a sixth preset algorithm based on the total amount of the simulated correction tropospheric formaldehyde columns in each satellite cell, the total amount of the simulated tropospheric formaldehyde columns in each third model cell and the total amount of the simulated boundary layer formaldehyde columns in each third model cell;
and respectively calculating the theoretical boundary layer formaldehyde column total amount in each satellite cell according to a seventh preset algorithm based on the simulated correction tropospheric formaldehyde column total amount in each satellite cell, the simulated correction boundary layer formaldehyde column total amount in each satellite cell and the observed tropospheric formaldehyde column total amount in each satellite cell.
7. The method for obtaining near-ground formaldehyde concentration based on satellite remote sensing technology according to claim 6, wherein after said step of calculating the theoretical boundary layer formaldehyde column total amount in each of said satellite cells according to a seventh preset algorithm, further comprising the steps of:
obtaining the total amount of the simulated near-ground formaldehyde columns in each third model cell;
based on the total amount of the simulated correction tropospheric formaldehyde columns in each satellite cell, the total amount of the simulated tropospheric formaldehyde columns in each third model cell and the total amount of the simulated near-ground formaldehyde columns in each third model cell, respectively calculating the total amount of the simulated correction near-ground formaldehyde columns in each satellite cell according to an eighth preset algorithm;
calculating the theoretical lowest formaldehyde column total amount in each satellite cell according to a ninth preset algorithm based on the simulated correction tropospheric formaldehyde column total amount in each satellite cell, the simulated correction near-ground formaldehyde column total amount in each satellite cell and the observed tropospheric formaldehyde column total amount in each satellite cell;
The method comprises the steps of obtaining the pressure difference between a boundary layer and near ground, respectively calculating the first theoretical near ground formaldehyde concentration in each satellite cell according to a first preset algorithm based on the total amount of theoretical boundary layer formaldehyde columns in each satellite cell, and further comprises the following steps:
acquiring pressure difference between the lowest layer and the near ground by using an atmospheric chemical transmission model, and respectively calculating second theoretical near ground formaldehyde concentration in each satellite cell according to the first preset algorithm based on the total amount of theoretical lowest layer formaldehyde columns in each satellite cell;
calculating a concentration deviation value according to a tenth preset algorithm based on the second theoretical near-surface formaldehyde concentration in each satellite cell and the first theoretical near-surface formaldehyde concentration in each satellite cell;
judging whether the total amount of formaldehyde columns of an observation troposphere in each satellite cell is larger than a first threshold value;
if the total amount of the formaldehyde columns of the observed troposphere in the satellite cells is larger than the first threshold value, calculating the third theoretical near-ground formaldehyde concentration in the satellite cells according to an eleventh preset algorithm based on the first theoretical near-ground formaldehyde concentration in the satellite cells and the concentration deviation value.
8. The method for obtaining near-ground formaldehyde concentration based on satellite remote sensing technology according to claim 7, wherein after said step of determining whether the total amount of the observed tropospheric formaldehyde column in each of said satellite cells is greater than a first threshold, further comprising the steps of:
if the total amount of the formaldehyde columns of the observation troposphere in the satellite unit cells is not more than the first threshold value, judging whether the total amount of the formaldehyde columns of the observation troposphere in the satellite unit cells is more than a second threshold value or not;
if the total amount of the observed tropospheric formaldehyde columns in the satellite cells is greater than the second threshold, a fourth theoretical near-ground formaldehyde concentration in the satellite cells is calculated according to a twelfth preset algorithm based on the first theoretical near-ground formaldehyde concentration in the satellite cells, the total amount of the observed tropospheric formaldehyde columns in the satellite cells, and the concentration deviation value.
9. A near-surface formaldehyde concentration acquisition system based on satellite remote sensing technology, characterized in that it comprises a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the near-surface formaldehyde concentration acquisition method based on satellite remote sensing technology according to any one of claims 1 to 8.
10. A computer-readable storage medium, wherein the computer-readable storage medium has stored thereon a near-surface formaldehyde concentration acquisition program based on a satellite remote sensing technology, which when executed by a processor, implements the steps of the near-surface formaldehyde concentration acquisition method based on a satellite remote sensing technology as set forth in any one of claims 1 to 8.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103744069A (en) * 2013-12-31 2014-04-23 中国科学院遥感与数字地球研究所 Methane profile orthogonal inversion method aiming at AIRS (atmospheric infrared sounder) hyper-spectrum satellite data
KR20140103229A (en) * 2013-02-15 2014-08-26 연세대학교 산학협력단 Apparatus for analyzing atmosphere
CN109001091A (en) * 2018-07-18 2018-12-14 北京航天宏图信息技术股份有限公司 Satellite remote-sensing monitoring method, device and the computer-readable medium of atmosphere pollution
CN110031412A (en) * 2019-04-25 2019-07-19 中国科学技术大学 Air Pollutant Emission flux acquisition methods based on mobile AHSA observation
CN110942049A (en) * 2019-12-17 2020-03-31 生态环境部卫星环境应用中心 Ozone pollution source identification method and system based on satellite remote sensing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140103229A (en) * 2013-02-15 2014-08-26 연세대학교 산학협력단 Apparatus for analyzing atmosphere
CN103744069A (en) * 2013-12-31 2014-04-23 中国科学院遥感与数字地球研究所 Methane profile orthogonal inversion method aiming at AIRS (atmospheric infrared sounder) hyper-spectrum satellite data
CN109001091A (en) * 2018-07-18 2018-12-14 北京航天宏图信息技术股份有限公司 Satellite remote-sensing monitoring method, device and the computer-readable medium of atmosphere pollution
CN110031412A (en) * 2019-04-25 2019-07-19 中国科学技术大学 Air Pollutant Emission flux acquisition methods based on mobile AHSA observation
CN110942049A (en) * 2019-12-17 2020-03-31 生态环境部卫星环境应用中心 Ozone pollution source identification method and system based on satellite remote sensing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
一种基于卫星遥感AOT估算近地面颗粒物的方法;陶金花;张美根;陈良富;王子峰;苏林;葛萃;韩霄;邹铭敏;;中国科学:地球科学;20130120(第01期);全文 *

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