Method for processing 89GHz data for snow and melt detection on the surface of ice cover on Antarctic
A processing method and data technology, applied in the field of 89GHz data processing for snowmelt detection on the surface of the Antarctic ice sheet, can solve the problems of low spatial resolution of low-frequency data, difficulty in obtaining snowmelt detection results, etc., and achieve high spatial resolution , the effect of good details
Inactive Publication Date: 2021-08-13
HENAN UNIVERSITY OF TECHNOLOGY
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At present, a lot of work has been done on the detection of snowmelt on the ice sheet surface based on the low-frequency data of microwave radiometers, but the spatial resolution of low-frequency data is low, and it is difficult to obtain accurate snowmelt detection results
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[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0035] Such as Figure 1-11 As shown, a processing method of 89GHz data for snowmelt detection on the Antarctic ice sheet surface,
[0036] S1, using the stable relationship between the polarization ratio of the 89GHz data of AMSR-2 and the 36GHz data under clear and cloudless weather conditions, to filter out the affected 89GHz data;
[00...
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The invention provides a method for processing 89GHz data for snow and melt detection on the surface of an ice cover on the Antarctic, and the method comprises the following steps: S1, screening out affected 89GHz data through employing the stable relation of the ratio of the polarization ratio of the 89GHz data to the polarization ratio of the 36GHz data of AMSR-2 under the condition of sunny cloudless weather; S2, performing fitting by using sample data selected from the five-year data to obtain a function relationship between the 36GHz data and the 89GHz data which are not influenced, and correcting the influenced 89GHz data; and S3, based on a single-channel threshold method proposed in Mote1993, applying the corrected 89GHz data to South Pole ice cover surface snow melting detection. According to the method for processing 89GHz data for snow and melt detection on the surface of an ice cover on the Antarctic, the 89GHz data which is high in spatial resolution and is easily interfered by external environments such as cloud and water vapor can be applied to snow-melting detection on the surface of the polar ice cover, so that the snow-melting detection precision and detection effect on the surface of the South Pole ice cover are improved.
Description
technical field [0001] The invention relates to the technical field, in particular to a processing method for 89GHz data used for snowmelt detection on the surface of the Antarctic ice sheet. Background technique [0002] The Antarctic ice sheet has an important impact on global sea level rise and climate change, and high-spatial-resolution snowmelt information on the ice sheet surface is of great significance to the study of global climate change. At present, the spatial resolution of the snowmelt detection results on the ice sheet surface based on the low-frequency data of the microwave radiometer is low, and it is impossible to obtain accurate freeze-thaw changes. In this case, the spatial resolution of the AMSR-E 89GHz data is at least twice that of other microwave frequency bands. It has become the main data source of microwave remote sensing with high spatial resolution. However, 89GHz data is easily affected by atmospheric water vapor. [0003] Therefore, accurate an...
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IPC IPC(8): G01J5/00G01W1/00
CPCG01J5/00G01W1/00
Inventor 王星东张浩伟杨淑绘赵颜创王玉华牛汇林唐雪珂
Owner HENAN UNIVERSITY OF TECHNOLOGY