CN1284966C - Method for obtaining near ground layer sand dust particle quantity deep time-space distribution - Google Patents
Method for obtaining near ground layer sand dust particle quantity deep time-space distribution Download PDFInfo
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- CN1284966C CN1284966C CN 200410058394 CN200410058394A CN1284966C CN 1284966 C CN1284966 C CN 1284966C CN 200410058394 CN200410058394 CN 200410058394 CN 200410058394 A CN200410058394 A CN 200410058394A CN 1284966 C CN1284966 C CN 1284966C
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Abstract
The present invention discloses a method for obtaining the time-space distribution of the mass concentration of ground layer sand dust particles. The method of the present invention has the following steps: firstly, data of meteorological visibility under a sand dust weather condition is observed and obtained from weather stations in the same time and under the sand dust weather condition; the data of the meteorological visibility is counted from observation data, and visibility observed from the weather stations is converted into particle mass concentration according to the analysis and the estimation of the relationship of the visibility and the sand dust particle concentration; a mass concentration-visibility relation graph is established by using the particle mass concentration as a longitudinal coordinate and using the visibility as a horizontal coordinate for fitting mass concentration-visibility relationship curves; the space-time distribution graph is obtained according to the mass concentration-visibility relationship curves. The present invention solves the problem that the time-space distribution of the particle concentration can not be observed under the sand dust weather condition until now in the country and provides an effective observation method for the forecast, the precaution, the sand defend and the sand control of sand dust storms.
Description
Technical field
The invention belongs to the atmosphere environment supervision field, relate in particular to a kind of method of obtaining ground layer sand and dust mass particle concentration spatial and temporal distributions.
Background technology
China Meteorological Administration is furnished with conventional meteorological observation net in China.Observational network is provided with 681 basic meteorological stations in China, has covered each area of China.Per 3 hours of these meteorological observation stations transmit observational datas such as meteorological element such as temperature, wet, pressure and weather phenomenon to China Meteorological Administration.These data have been used for the qualitative monitoring of weather forecast and dust and sand weather.But up to the present, also be not used in the Quantitative Monitoring of sand and dust particle concentration space distribution.
Understand the seedbed of sand and dust particle and the transport path of sand and dust particle and play crucial effect for sandstorm forecasting and warning and sand prevention, sand control.Understand the seedbed of sand and dust particle and the transport path of sand and dust particle, need the spatial and temporal distributions of Quantitative Monitoring sand and dust particle concentration.The instrument of observation sand and dust particle concentration mainly contains surveying instrument TSP and PM10 etc. at present, with the key instrument PM10 in the present atmosphere environment supervision is example, it can measure the mass concentration of particle diameter less than particle in 10 microns the atmosphere, but, be difficult to provide the space distribution of sand and dust particle concentration owing to the restriction of number of stations.Up to the present China can't provide the spatial and temporal distributions of sand and dust particle quantitatively at the sandstorm burst period.
Summary of the invention
The purpose of this invention is to provide a kind of method of obtaining ground layer sand and dust mass particle concentration spatial and temporal distributions, can provide the spatial and temporal distributions of sand and dust particle quantitatively, for China's sandstorm forecasting and warning and the research of defending and controlling sand provide observation method.
For achieving the above object, the present invention takes following design proposal: a kind of method of obtaining ground layer sand and dust mass particle concentration spatial and temporal distributions, and its method step is as follows:
1) at first select same time under the dust and sand weather condition in each meteorological station observation and obtain the data of the meteorological optical range under the dust and sand weather condition;
2) data of statistics meteorological optical range from observational data calculate that according to the relationship analysis of visibility and sand and dust mass particle concentration the visibility that each meteorological station is observed is converted to sand and dust mass particle concentration;
3) be ordinate with sand and dust mass particle concentration, visibility is horizontal ordinate, sets up mass concentration-visibility graph of a relation, match mass concentration-visibility relation curve;
4) obtain sand and dust mass particle concentration spatial and temporal distributions figure according to mass concentration-visibility relation curve.
Advantage of the present invention is: solved the problem that up to the present China can't observe particle concentration spatial and temporal distributions under the dust and sand weather condition, for China sandstorm forecasting and warning and the research of defending and controlling sand provide effective observation method.
Description of drawings
Fig. 1 is sand and dust mass particle concentration of the present invention-visibility graph of a relation
(Fig. 2-A～Fig. 2-F) is the spatial and temporal distributions change procedure figure of the present invention's one Application Example sand and dust mass particle concentration to Fig. 2
Embodiment
(1) visibility and Atmospheric particulates mass concentration
Meteorological optical range refers in the daytime, is background with near the sky the local horizon, and the ultimate range of the black objects thing of size appropriateness can be seen and recognize to twenty-twenty vision, is unit with the kilometer.The unique factor that influences meteorological optical range is physical characteristics of Atmospheric particulates (concentration and spectrum distribute) and optical characteristics (delustring and scattering coefficient etc.).Under general weather condition, the relation of meteorological optical range L and Atmospheric particulates extinction coefficient σ can be expressed as:
L＝3.912/σ， (1)
Wherein, extinction coefficient is proportional to the mass concentration of particle in the atmosphere.Therefore, the mass concentration of particle is inversely proportional in visibility and the atmosphere.
Under the extreme weather conditions such such as sandstorm, atmosphere may not be regarded horizontal homogeneous as.This moment, meteorological optical range still was decided by the physics and the optical characteristics of Atmospheric particulates, but equation (1) is no longer suitable.
Obtaining one can blanket visibility under dust and sand weather (comprising sand and dust, airborne dust, sandstorm, strong sandstorm) condition and the relation of sand and dust mass particle concentration, we at first select under the dust and sand weather condition at each meteorological station simultaneously by the sand and dust mass particle concentration of PM10 observation and the meteorological optical range data of meteorological station observation, carry out statistical study, the result as shown in Figure 1.Ordinate is a sand and dust mass particle concentration among the figure, and horizontal ordinate is a visibility.Discrete point is represented observation data, and solid line is the mass concentration-visibility relation curve to the observation data match.As can be seen from Figure, though owing to exist observational error, observation station has certain divergence around matched curve, and the related coefficient of match can reach 0.78.This fact has offered some clarification on that the relation of the mass concentration shown in the matched curve and visibility is operable among Fig. 1.
The present invention obtains the method for ground layer sand and dust mass particle concentration spatial and temporal distributions, and its concrete grammar step is as follows:
1) at first select same time under the dust and sand weather condition in each meteorological station ground point observation and obtain the data of the meteorological optical range under the dust and sand weather condition;
2) data of statistics meteorological optical range from observational data calculate that according to the relationship analysis of visibility and sand and dust particle concentration the visibility that each meteorological station is observed is converted to sand and dust mass particle concentration;
3) rendering quality concentration-visibility graph of a relation: with sand and dust mass particle concentration is ordinate, and visibility is that horizontal ordinate is set up coordinate system figure, match mass concentration-visibility relation curve; Ordinate is a mass particle concentration among the figure, and horizontal ordinate is a visibility.Discrete point is represented observation data, and solid line is the mass concentration-visibility relation curve to the observation data match:
4) obtain sand and dust mass particle concentration spatial and temporal distributions figure according to mass concentration-visibility relation curve.
Adopt technical solution of the present invention, can obtain one can blanket visibility under dust and sand weather (comprising sand and dust, airborne dust, sandstorm, strong sandstorm) condition and the relation of sand and dust mass particle concentration.
Fig. 2-A～Fig. 2-F has provided the spatial and temporal distributions change procedure figure of one embodiment of the invention (application experiment) sand and dust mass particle concentration; Can clearly be seen that the seedbed of sandstorm outburst, mobile and disappearance by figure.
Claims (1)
1, a kind of method of obtaining ground layer sand and dust mass particle concentration spatial and temporal distributions is characterized in that method step is as follows:
1) at first select same time under the dust and sand weather condition in each meteorological station ground point observation and obtain the data of the meteorological optical range under the dust and sand weather condition;
2) data of statistics meteorological optical range from observational data calculate that according to the relationship analysis of visibility and sand and dust particle concentration the visibility that each meteorological station is observed is converted to sand and dust mass particle concentration;
3) be ordinate with sand and dust mass particle concentration, visibility is horizontal ordinate, sets up mass concentration-visibility graph of a relation, match mass concentration-visibility relation curve;
4) obtain mass concentration spatial and temporal distributions figure according to mass concentration-visibility relation curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200410058394 CN1284966C (en) | 2004-08-13 | 2004-08-13 | Method for obtaining near ground layer sand dust particle quantity deep time-space distribution |
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| CN 200410058394 CN1284966C (en) | 2004-08-13 | 2004-08-13 | Method for obtaining near ground layer sand dust particle quantity deep time-space distribution |
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| CN1587987A CN1587987A (en) | 2005-03-02 |
| CN1284966C true CN1284966C (en) | 2006-11-15 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102169588B (en) * | 2010-02-26 | 2016-06-15 | 新奥特（北京）视频技术有限公司 | A kind of method and apparatus creating meteorological curve |
| JP5073861B1 (en) * | 2011-05-13 | 2012-11-14 | 新日本製鐵株式会社 | Search method of unsteady dust source position of falling dust |
| CN103954542B (en) * | 2014-05-12 | 2017-04-05 | 中国计量学院 | Based on the PM2.5 concentration detectors that non-reference picture definition is evaluated |
| CN109507072B (en) * | 2018-11-19 | 2020-09-08 | 北京大学 | Fine particle turbulent flux measurement method |
| CN117272866B (en) * | 2023-09-28 | 2024-03-22 | 中国科学技术大学 | Variable grid simulation method and equipment for mass concentration of particle size segmented sand dust |
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