CN116028510B - Ocean jump layer searching method and system - Google Patents
Ocean jump layer searching method and system Download PDFInfo
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Abstract
The invention discloses a method and a system for searching ocean jump layers, wherein a windowed vertical gradient method is adopted to search water layers, and the top boundary and the bottom boundary of each searched water layer are stored into a first structure linked list; then merging the water layers meeting the merging conditions in the first structure linked list to obtain a merged water layer, and storing the top boundary and the bottom boundary of the merged water layer and the top boundary and the bottom boundary of the water layer which are not merged in the first structure linked list into a second structure linked list; and then determining the water layer meeting the jump layer determination condition in the second structure body linked list as the jump layer. The invention adopts a windowed vertical gradient method to directly analyze the measured small interval data materials to search the water layer, thereby effectively solving the problem of gradient 'over-value' scattered points or extremely thin water layer. In addition, the invention does not need to interpolate the actually measured small interval data to the standard layer, thereby improving the precision of the characteristic indexes such as the depth, the thickness, the strength and the like of the jump layer.
Description
Technical Field
The invention relates to the field of physical ocean science research and application, in particular to a method and a system for searching ocean jump layers.
Background
The temperature jump layer is an important physical phenomenon in the ocean, is an important index reflecting the ocean temperature field, has important influence on ocean fishery production, underwater communication, submarine activities and the like, has close relation with branch subjects such as ocean circulation, water mass, internal wave, sea gas exchange and the like, and is one of important research contents of physical ocean.
The calculation method of vertical gradient method is to divide sea water into N water layers from sea surface to sea bottom, and the depth and temperature of each water layer are marked as Z 1 -Z n And T 1 -T n Gradient of each water layer
By using the principle of "strong selection", when the vertical gradient of a certain section (i.e. a certain water layer) in a temperature section is greater than the critical valueThe value (0.2 ℃/m, the water depth is less than or equal to 200 meters; 0.05 ℃/m, the water depth)>200 meters), the top water depth of the section is the top boundary depth of the jump layer (namely the jump layer depth), the bottom water depth of the section is the bottom boundary water depth of the jump layer, the difference between the top depth and the bottom depth of the section is the jump layer thickness, and the vertical gradient R of the section is the jump layer strength. When the temperature jump layer analysis is carried out by adopting a vertical gradient method, N standard layer data of the section are required to be obtained or the data to be analyzed are interpolated into N standard layers.
When the measured small-interval data (including a plurality of observation points, small intervals between adjacent observation points) obtained by CTD (Conductivity Temperature Depth), XCTD (Expendable Conductivity Temperature Depth) or XBT (Expendable bathythermograph) equipment and other equipment are directly analyzed by using a vertical gradient method, if each observation point is used as a layer to calculate the gradient, besides the gradient value of one or a plurality of water layers is greater than the minimum standard value of the jump layer, an 'over-value' scattered point or an extremely thin water layer can appear as the gradient of each observation point is calculated as a layer, and the time-varying fluctuation caused by internal waves and other factors is contained in the small-interval observation data. The black curve in fig. 1 represents the scatter or water layer for which the gradient values are satisfactory. If the measured small interval observation data is interpolated to the standard layer, then the vertical gradient method is used for searching the jump layer, so that the precision of the jump layer characteristic quantity (jump layer depth, jump layer thickness and jump layer strength) is reduced.
Disclosure of Invention
The invention aims to provide a method and a system for searching ocean jump layers, so as to improve the accuracy of jump layer determination.
In order to achieve the above object, the present invention provides the following solutions:
a method of ocean jump look-up, the method comprising the steps of:
constructing a temperature-depth correspondence table based on the seawater temperature data of the preset depth interval and the depth data corresponding to each seawater temperature data; the temperature-depth correspondence table includes a plurality of data sets arranged in order of increasing depth data; each data set includes: seawater temperature data and corresponding depth data;
searching a water layer by adopting a windowed vertical gradient method based on the temperature-depth corresponding table from a first data set in the temperature-depth corresponding table, and storing the top boundary and the bottom boundary of each searched water layer into a first structure body linked list; each data set includes: sea water temperature data and depth data corresponding to the sea water temperature data;
combining the water layers meeting the combining conditions in the first structure linked list to obtain a combined water layer, and storing the top boundary and the bottom boundary of the combined water layer and the top boundary and the bottom boundary of the water layer which are not combined in the first structure linked list into a second structure linked list;
and determining a water layer meeting the jump layer determination condition in the second structure body linked list as a jump layer.
Optionally, based on the first data set in the temperature-depth correspondence table, searching for water layers by using a windowed vertical gradient method based on the temperature-depth correspondence table, and storing the top boundary and the bottom boundary of each searched water layer into a first structure body linked list, which specifically includes:
initializing the value of i to be 1;
windowing the temperature-depth correspondence table from an ith data set of the temperature-depth correspondence table; the depth of the window is N times of the preset depth interval; n is not less than 1 and not more than P, P being the total number of groups of the plurality of data groups; calculating a temperature gradient value between a first data set and a last data set in the window as a first gradient value;
judging whether the first gradient value is larger than a critical gradient value or not to obtain a first judging result;
if the first judging result indicates no, increasing the value of i by 1;
if the first judgment result shows that the temperature gradient value between any two adjacent data sets in the window is calculated sequentially from the first data set of the window, the temperature gradient value is used as a second gradient value, and depth data in the previous data set in the two data sets corresponding to the second gradient value which is larger than or equal to the critical gradient value is determined to be the top boundary of the water layer; searching a bottom boundary of a water layer from the top boundary of the water layer, and adding the top boundary and the bottom boundary of the water layer into a first structure body linked list to increase the numerical value of i by M; the bottom boundary of the water layer is depth data in the previous data set of the data set corresponding to the determined first third gradient value smaller than the critical gradient value from the next data set of the top boundary of the water layer; the third gradient value is a temperature gradient value between a data set behind the top boundary of the water layer and a data set corresponding to the top boundary of the water layer;
judging whether the difference value between the current values of P and i is smaller than N, and obtaining a second judging result;
if the second judgment result indicates no, returning to the step of windowing the temperature-depth correspondence table from the ith data group of the temperature-depth correspondence table;
and if the second judgment result shows that the first structure body linked list is yes, outputting the first structure body linked list.
Optionally, combining the water layers meeting the combining conditions to obtain a combined water layer, which specifically includes:
initializing the numerical value of j to be 1 and initializing the numerical value of k to be 1;
judging whether a j-th water layer and a j+1-th water layer in the first structure body linked list meet a merging condition or not, and obtaining a third judging result;
if the third judgment result shows that the water layer is the j-th water layer, combining the j-th water layer and the j+1-th water layer to obtain a k-th combined water layer;
judging whether the water layer after the k-th merging and the j+1+k-th water layer in the first structure body linked list meet the merging condition or not, and obtaining a fourth judging result;
if the fourth judgment result shows that the water layer after the k-th combination is combined with the j+1+k-th water layer in the first structure linked list, the water layer after the k+1-th combination is obtained, the value of k is increased by 1, and the step of calculating the distance between the bottom boundary of the water layer after the k-th combination and the top boundary of the j+1+k-th water layer in the first structure linked list is returned;
if the fourth judgment result indicates no, storing the top boundary and the bottom boundary of the water layer after the k-th merging into a second structure body linked list;
increasing the value of j by k+1, and returning to the step of judging whether the j-th water layer and the j+1-th water layer in the first structure body linked list meet the combination condition to obtain a third judgment result;
if the third judgment result indicates no, increasing the value of j by 1, and returning to the step of judging whether the j-th water layer and the j+1-th water layer in the first structure body linked list meet the combination condition to obtain a third judgment result;
and after traversing all the water layers in the first structure body linked list, outputting the second structure body linked list.
Optionally, the combining condition is a first combining condition or a second combining condition;
the first combining condition is that the top boundary of the previous water layer in the two water layers to be combined is smaller than or equal to 50m, and the distance between the two water layers to be combined is smaller than or equal to 10m; the distance between the two water layers to be combined is the distance between the bottom boundary of the previous water layer and the top boundary of the next water layer in the two water layers to be combined;
the second combining condition is that the top boundary of the previous water layer in the two water layers to be combined is larger than 50m, and the distance between the two water layers to be combined is smaller than or equal to 30m.
Optionally, the jump layer determining condition is a first determining condition or a second determining condition;
the first determination condition is: the top boundary of the combined water layers is less than or equal to 50 meters, and the thickness of the combined water layers is greater than or equal to 10 meters;
the second determination condition is: the top boundary of the combined water layers is greater than 50 meters, and the thickness of the combined water layers is greater than 20 meters.
Optionally, the constructing a temperature-depth correspondence table based on the seawater temperature data of the preset depth interval and the depth data corresponding to each seawater temperature data further includes:
performing range inspection, peak inspection and gradient inspection on the obtained seawater temperature data;
and performing range check and monotonicity check on the obtained depth data.
A system for ocean jump look-up, the system being applied to the method described above, the system comprising:
the temperature-depth correspondence table construction module is used for constructing a temperature-depth correspondence table based on the seawater temperature data of the preset depth interval and the depth data corresponding to each seawater temperature data; the temperature-depth correspondence table includes a plurality of data sets arranged in order of increasing depth data; each data set includes: seawater temperature data and corresponding depth data;
the water layer searching module is used for searching a water layer from a first data set in the temperature-depth corresponding table by adopting a windowed vertical gradient method based on the temperature-depth corresponding table, and storing the top boundary and the bottom boundary of each searched water layer into a first structure body linked list; each data set includes: sea water temperature data and depth data corresponding to the sea water temperature data;
the water layer merging module is used for merging the water layers meeting the merging conditions in the first structure body linked list to obtain a merged water layer, and storing the top boundary and the bottom boundary of the merged water layer and the top boundary and the bottom boundary of the water layer which are not merged in the first structure body linked list into the second structure body linked list;
and the jump layer determining module is used for determining a water layer meeting jump layer determining conditions in the second structure body linked list as a jump layer.
An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method described above when executing the computer program.
A computer readable storage medium having stored thereon a computer program which when executed implements the method described above.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a method and a system for searching ocean jump layers, wherein a windowed vertical gradient method is adopted to search water layers, and the top boundary and the bottom boundary of each searched water layer are stored into a first structure linked list; then merging the water layers meeting the merging conditions in the first structure linked list to obtain a merged water layer, and storing the top boundary and the bottom boundary of the merged water layer and the top boundary and the bottom boundary of the water layer which are not merged in the first structure linked list into a second structure linked list; and then determining the water layer meeting the jump layer determination condition in the second structure body linked list as the jump layer. The invention adopts a windowed vertical gradient method to directly analyze the measured small interval data materials to search the water layer, thereby effectively solving the problem of gradient 'over-value' scattered points or extremely thin water layer. In addition, the invention does not need to interpolate the actually measured small interval data to the standard layer, thereby improving the precision of the characteristic indexes such as the depth, the thickness, the strength and the like of the jump layer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a temperature profile jump found by a vertical gradient method in the background of the invention;
FIG. 2 is a flow chart of a method for ocean jump layer search provided by an embodiment of the invention;
FIG. 3 is a flow chart of searching a water layer by using a windowed vertical gradient method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a temperature profile jump layer searched by using the method according to the embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
The invention aims to provide a method and a system for searching ocean jump layers, so as to improve the accuracy of jump layer determination.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
The embodiment of the invention provides a method for searching ocean jump layers, which comprises the following steps:
constructing a temperature-depth correspondence table based on the seawater temperature data of the preset depth interval and the depth data corresponding to each seawater temperature data; the temperature-depth correspondence table includes a plurality of data sets arranged in order of increasing depth data; each data set includes: seawater temperature data and corresponding depth data;
searching a water layer by adopting a windowed vertical gradient method based on the temperature-depth corresponding table from a first data set in the temperature-depth corresponding table, and storing the top boundary and the bottom boundary of each searched water layer into a first structure body linked list; each data set includes: sea water temperature data and depth data corresponding to the sea water temperature data;
combining the water layers meeting the combining conditions in the first structure linked list to obtain a combined water layer, and storing the top boundary and the bottom boundary of the combined water layer and the top boundary and the bottom boundary of the water layer which are not combined in the first structure linked list into a second structure linked list;
and determining a water layer meeting the jump layer determination condition in the second structure body linked list as a jump layer.
As shown in fig. 2, the specific implementation manner of the method provided by the embodiment of the invention is as follows:
step 1: and obtaining seawater temperature-depth profile data of a measured small interval (namely a preset depth interval) from a MySQL database.
1-1, connecting MySQL database software, and confirming that the connection is successful;
1-2, executing an SQL sentence to obtain a data result set, and storing the data result set into a my_sql_result variable of a MYSQL_RES type;
1-3, reading the number data_num of sea water temperature profile data points in the my_sql_result, opening up two double-type array variables dbl_temperature_data [ data_num ] and dbl_depth_data [ data_num ], and respectively storing sea water temperature profile data and corresponding depth profile data read from a database.
Step 2: and performing quality control on the obtained actually measured small interval temperature-depth profile data.
2-1, checking the temperature range. And performing range check on the temperature profile data stored in the dbl_temperature_data [ ] array, and taking the temperature data exceeding the threshold value as an error value and rejecting. Because the data sampling interval is smaller, for the temperature data exceeding the threshold value, the removed temperature data value is filled by a linear interpolation method according to the data of the two nearest correct sampling points, and the processed data is stored in a double type dbl_temperature_QC_data variable.
2-2, checking temperature peak. And (3) carrying out peak inspection on the temperature profile data stored in the dbl_temperature_QC_data [ ], judging the temperature profile data to be an abnormal value if a large mutation occurs, and replacing the abnormal value by a linear interpolation method according to the last two correct values. The calculation method for the peak test is as follows:
temperature spike test value =
………（1）
Wherein, (1) formula:
v (t): a current temperature observation;
v (t-1): a first correct temperature observation preceding the current temperature observation;
v (t+1): the first correct temperature observation after the current temperature observation.
2-3, checking the temperature gradient. The gradient test is performed on the temperature profile data stored in dbl_temperature_qc_data [ ], and if the gradient is large, it is determined as an outlier. And replacing the abnormal value by using a linear interpolation method according to the last two correct values. The calculation method of the gradient test is as follows:
temperature gradient test value =
………（2）
Wherein, (2) formula:
v (t): a current temperature observation;
v (t-1): a first correct temperature observation preceding the current temperature observation;
v (t+1): the first correct temperature observation after the current temperature observation.
2-4, checking depth range. The depth data stored in dbl_depth_data [ ] is range checked. Determining depth data exceeding the depth of the observed sea area or depth data exceeding the maximum measurement depth of the observation instrument as an error value; and replacing the depth error value by using a linear interpolation method according to the last two correct values. The processed data is stored in the double type dbl_depth_QC_data [ ] variable.
2-5, checking depth monotonicity. And (3) performing monotonicity check on the depth data stored in dbl_depth_QC_data [ ], wherein the depth data corresponding to the sea water temperature profile has monotonicity, and judging the depth data with monotonicity abnormality as an error value. And replacing the depth error value by using a linear interpolation method according to the last two correct values. The processed data is still stored in the double type dbl_depth_QC_data [ ] variable.
Step 3: and smoothing and filtering the temperature data dbl_temperature_QC_data [ ] subjected to quality control, smoothing a temperature-depth profile curve, and improving the signal-to-noise ratio of the data. A double variable dbl_temperature_QC_data [ ] with the size of data_num is opened up to store the smoothed temperature-depth profile data. The temperature-depth correspondence table contains dbl_temperature_qc_data [ ] and dbl_temperature_qc_data [ ].
Step 4: and (5) water layer searching conforming to the gradient value. The window vertical gradient method is used for searching the water layer in the sea water temperature-depth profile, and is the most critical step in jump layer searching.
The windowed vertical gradient method is to open from the surface layerCalculating gradient value R of the section by using temperature-depth data of the top and the bottom of the window by taking water depth of 5 meters as the window Window top-window bottom 。
If R is Window top-window bottom Not less than critical gradient value R Critical of And judging the section as a window conforming to the gradient condition, searching a starting point of the jump layer in the window, sequentially calculating the gradient by taking the point as the starting point and a point after the point in the section, and searching a water layer conforming to the gradient condition. As shown in fig. 3, the method specifically comprises the following steps:
4-1 for the processed data dbl_temperature_QC_data [ from the temperature profile data surface layer ]]And dbl_depth_QC_data []Searching the gradient of the window according to the windowed gradient method, when finding the window meeting the gradient condition or the depth difference (D max -D i ）<And 5 meters, jumping out of the circulation.
4-2, if a window meeting the gradient condition is found, searching a starting point of the water layer in the window, namely searching a gradient between the first two adjacent points from the top of the window to the bottom of the window to be more than or equal to a critical value (R i，i+1 >R Critical of ) Starting from point (I), the gradient R between the point (I) and the point (R) behind the window is calculated in turn i，（i+n） Up to R i，（i+n） <R Critical of And marking the index number of the section position of the starting point I as the position of the top boundary of the water layer, and the last one is larger than or equal to the critical gradient value (R i，（i+n-1） ≥R Critical of ) The index of the point is marked as the position of the bottom boundary of the water layer, and the indexes of the positions of the top and bottom boundaries of the water layer are stored into a first structure body linked list all_water_layer.
4-3, repeating the method of 4-1 and 4-2 to continuously search all water layers in the section, and simultaneously storing the top boundary and bottom boundary indexes of the water layers into a first structure body linked list all_water_layer.
4-4, if the window conforming to the gradient is not found in the whole section according to the method in the step 4-1, judging that the section has no jump layer.
Step 5: and (5) jump layer searching. The water layers found in the temperature profile are processed (e.g., consolidated) to determine the transitions in the temperature profile.
5-1, starting from the first aqueous layer, combining with the subsequent aqueous layer. Calculating the distance H between the two water layers, and if H is smaller than or equal to 10 meters (when the top boundary depth is smaller than or equal to 50 meters) or smaller than or equal to 30 meters (when the top boundary depth is larger than 50 meters), combining the two jump layers; otherwise, the combination is not possible.
5-2, calculating the gradient of the two water layers after combination according to the distance meeting the combination condition, if R is still more than or equal to Critical of Merging the water layers into a water layer, continuing to merge the water layers with the later water layers until the water layers which cannot be merged appear, marking the water layers which can be merged as a processed water layer, and storing the top boundary index and the bottom boundary index of the processed water layer into a second structure body linked list process_water_layer; if all the water layers can be combined, marking all the water layers as a processed water layer, and storing the top boundary index and the bottom boundary index of the processed water layer into a second structure body linked list process_water_layer, wherein all the water layers are processed.
5-3, repeating the decision of 5-1 and 5-2 by taking the first water layer which cannot be combined in 5-2 as a starting point, continuously combining the residual water layers, and storing the top boundary index and the bottom boundary index of each processed water layer into a second structure body linked list process_water_layer.
5-4, judging the combined water layers, wherein the thickness of the water layers of shallow jump layers (the top boundary depth is less than or equal to 50 meters) is more than or equal to 10 meters, or the thickness of the water layers of deep jump layers (the top boundary depth is more than 50 meters) is more than or equal to 20 meters, judging the water layers as jump layers, storing the top boundary index and the bottom boundary index of the jump layers into a third structure body linked list valid_layer, otherwise judging the water layers as not jump layers, and obtaining the jump layers according to the embodiment of the invention as shown in figure 4.
Step 6: and storing the jump-layer characteristic quantity. The found characteristic quantities such as depth, thickness and strength of the jump layer are stored in a database, and the jump layer using the temperature profile again can be directly read without calculation.
Example 2
Embodiment 2 of the present invention provides a system for ocean jump search, the system being applied to the method of embodiment 1, the system comprising:
the temperature-depth correspondence table construction module is used for constructing a temperature-depth correspondence table based on the seawater temperature data of the preset depth interval and the depth data corresponding to each seawater temperature data; the temperature-depth correspondence table includes a plurality of data sets arranged in order of increasing depth data; each data set includes: seawater temperature data and corresponding depth data;
the water layer searching module is used for searching a water layer from a first data set in the temperature-depth corresponding table by adopting a windowed vertical gradient method based on the temperature-depth corresponding table, and storing the top boundary and the bottom boundary of each searched water layer into a first structure body linked list; each data set includes: sea water temperature data and depth data corresponding to the sea water temperature data;
the water layer merging module is used for merging water layers meeting merging conditions in the first structure body linked list to obtain a merged water layer, and storing the top boundary and the bottom boundary of the merged water layer and the top boundary and the bottom boundary of the water layer which are not merged in the first structure body linked list into the first structure body linked list;
and the jump layer determining module is used for determining the merged water layer meeting the jump layer determining condition in the first structure body linked list as the jump layer.
The system provided by the embodiment of the invention is similar to the method described in the above embodiment, and the working principle and beneficial effects are similar, so that details are not described here, and the specific content can be referred to the description of the above method embodiment.
Example 3
Embodiment 3 of the present invention provides an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the method of embodiment 1 when executing the computer program.
Furthermore, the computer program in the above-described memory may be stored in a computer-readable storage medium when it is implemented in the form of a software functional unit and sold or used as a separate product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk.
Example 4
Embodiment 4 of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed, implements the method of embodiment 1.
In summary, the embodiment of the invention can directly analyze the actually measured small interval data materials to search the jump layer by using a windowed vertical gradient method, and effectively solves the problem of gradient 'over-value' scattered points or extremely thin 'water layers'.
According to the embodiment of the invention, the actually measured small interval data is not required to be interpolated into the standard layer, so that the accuracy of characteristic indexes such as the depth, the thickness and the strength of the jump layer is improved.
The embodiment of the invention solves the problem of jump layer searching and identifying in the marine hydrologic profile by using a computer intelligent algorithm.
According to the embodiment of the invention, the searched characteristic quantities such as the depth, thickness and strength of the temperature jump layer are stored in the database, and the characteristic quantities of the jump layer can be directly read without calculation when the jump layer is reused, so that the jump layer searching efficiency is improved.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (8)
1. A method of ocean jump-up, the method comprising the steps of:
constructing a temperature-depth correspondence table based on the seawater temperature data of the preset depth interval and the depth data corresponding to each seawater temperature data; the temperature-depth correspondence table includes a plurality of data sets arranged in order of increasing depth data; each data set includes: seawater temperature data and corresponding depth data;
searching a water layer by adopting a windowed vertical gradient method based on the temperature-depth corresponding table from a first data set in the temperature-depth corresponding table, and storing the top boundary and the bottom boundary of each searched water layer into a first structure body linked list;
combining the water layers meeting the combining conditions in the first structure linked list to obtain a combined water layer, and storing the top boundary and the bottom boundary of the combined water layer and the top boundary and the bottom boundary of the water layer which are not combined in the first structure linked list into a second structure linked list;
determining a water layer meeting the jump layer determination condition in the second structure body linked list as a jump layer;
from the first data set in the temperature-depth corresponding table, searching the water layer by adopting a windowed vertical gradient method based on the temperature-depth corresponding table, and storing the top boundary and the bottom boundary of each searched water layer into a first structure body linked list, wherein the method specifically comprises the following steps:
initializing the value of i to be 1;
windowing the temperature-depth correspondence table from an ith data set of the temperature-depth correspondence table; the depth of the window is N times of the preset depth interval; n is not less than 1 and not more than P, P being the total number of groups of the plurality of data groups; calculating a temperature gradient value between a first data set and a last data set in the window as a first gradient value;
judging whether the first gradient value is larger than or equal to a critical gradient value or not, and obtaining a first judging result;
if the first judging result indicates no, increasing the value of i by 1;
if the first judgment result shows that the temperature gradient value between any two adjacent data sets in the window is calculated sequentially from the first data set of the window, the temperature gradient value is used as a second gradient value, and depth data in the previous data set in the two data sets corresponding to the second gradient value which is larger than or equal to the critical gradient value is determined to be the top boundary of the water layer; searching a bottom boundary of a water layer from the top boundary of the water layer, and adding the top boundary and the bottom boundary of the water layer into a first structure body linked list to increase the numerical value of i by M; the bottom boundary of the water layer is depth data in the previous data set of the data set corresponding to the determined first third gradient value smaller than the critical gradient value from the next data set of the top boundary of the water layer; the third gradient value is a temperature gradient value between a data set behind the top boundary of the water layer and a data set corresponding to the top boundary of the water layer;
judging whether the difference value between the current values of P and i is smaller than N, and obtaining a second judging result;
if the second judgment result indicates no, returning to the step of windowing the temperature-depth correspondence table from the ith data group of the temperature-depth correspondence table;
and if the second judgment result shows that the first structure body linked list is yes, outputting the first structure body linked list.
2. The method for ocean jump layer search according to claim 1, wherein the step of combining the water layers meeting the combination condition to obtain a combined water layer comprises the steps of:
initializing the numerical value of j to be 1 and initializing the numerical value of k to be 1;
judging whether a j-th water layer and a j+1-th water layer in the first structure body linked list meet a merging condition or not, and obtaining a third judging result;
if the third judgment result shows that the water layer is the j-th water layer, combining the j-th water layer and the j+1-th water layer to obtain a k-th combined water layer;
judging whether the water layer after the k-th merging and the j+1+k-th water layer in the first structure body linked list meet the merging condition or not, and obtaining a fourth judging result;
if the fourth judgment result shows that the water layer after the k-th combination is combined with the j+1+k-th water layer in the first structure linked list, the water layer after the k+1-th combination is obtained, the value of k is increased by 1, and the step of calculating the distance between the bottom boundary of the water layer after the k-th combination and the top boundary of the j+1+k-th water layer in the first structure linked list is returned;
if the fourth judgment result indicates no, storing the top boundary and the bottom boundary of the water layer after the k-th merging into a second structure body linked list;
increasing the value of j by k+1, and returning to the step of judging whether the j-th water layer and the j+1-th water layer in the first structure body linked list meet the combination condition to obtain a third judgment result;
if the third judgment result indicates no, increasing the value of j by 1, and returning to the step of judging whether the j-th water layer and the j+1-th water layer in the first structure body linked list meet the combination condition to obtain a third judgment result;
and after traversing all the water layers in the first structure body linked list, outputting the second structure body linked list.
3. The method of ocean jump look-up according to claim 1 or 2, wherein the merge condition is a first merge condition or a second merge condition;
the first combining condition is that the top boundary of the previous water layer in the two water layers to be combined is smaller than or equal to 50m, and the distance between the two water layers to be combined is smaller than or equal to 10m; the distance between the two water layers to be combined is the distance between the bottom boundary of the previous water layer and the top boundary of the next water layer in the two water layers to be combined;
the second combining condition is that the top boundary of the previous water layer in the two water layers to be combined is larger than 50m, and the distance between the two water layers to be combined is smaller than or equal to 30m.
4. The method of ocean skip finding of claim 1, wherein the skip determination condition is a first determination condition or a second determination condition;
the first determination condition is: the top boundary of the combined water layers is less than or equal to 50 meters, and the thickness of the combined water layers is greater than or equal to 10 meters;
the second determination condition is: the top boundary of the combined water layers is greater than 50 meters, and the thickness of the combined water layers is greater than 20 meters.
5. The method of ocean jump look-up of claim 1, wherein constructing a temperature-depth correspondence table based on the seawater temperature data of the preset depth interval and the depth data corresponding to each seawater temperature data further comprises:
performing range inspection, peak inspection and gradient inspection on the obtained seawater temperature data;
and performing range check and monotonicity check on the obtained depth data.
6. A system for ocean jump-up, the system being applied to the method of any one of claims 1-5, the system comprising:
the temperature-depth correspondence table construction module is used for constructing a temperature-depth correspondence table based on the seawater temperature data of the preset depth interval and the depth data corresponding to each seawater temperature data; the temperature-depth correspondence table includes a plurality of data sets arranged in order of increasing depth data; each data set includes: seawater temperature data and corresponding depth data;
the water layer searching module is used for searching a water layer from a first data set in the temperature-depth corresponding table by adopting a windowed vertical gradient method based on the temperature-depth corresponding table, and storing the top boundary and the bottom boundary of each searched water layer into a first structure body linked list; each data set includes: sea water temperature data and depth data corresponding to the sea water temperature data;
the water layer merging module is used for merging the water layers meeting the merging conditions in the first structure body linked list to obtain a merged water layer, and storing the top boundary and the bottom boundary of the merged water layer and the top boundary and the bottom boundary of the water layer which are not merged in the first structure body linked list into the second structure body linked list;
and the jump layer determining module is used for determining a water layer meeting jump layer determining conditions in the second structure body linked list as a jump layer.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of any one of claims 1 to 5 when executing the computer program.
8. A computer readable storage medium, characterized in that a computer program is stored thereon, which computer program, when executed, implements the method according to any of claims 1 to 5.
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| CN104063563A (en) * | 2014-07-16 | 2014-09-24 | 国家海洋局第一海洋研究所 | Method for calculating ocean spring layer characteristic values through multi-line-segment least square fitting |
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