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A neural network method for monitoring snowstorm: A case study in southern China |
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| Authors: | Kebiao Mao Ying Ma Lang Xia Xinyi Shen Zhiwen Sun Tianjue He Guanhua Zhou |
| Institution: | 1. National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 100081, China 2. Guangzhou Institute of Geography, Guangzhou, 510070, China 3. Department of Geography, University of Toronto, Toronto, M5S3G3, Canada 4. Hydrometeorology and Remote Sensing Laboratory, University of Oklahoma, Norman, 73072, USA 5. Institute No. 503 of China Academy of Space Technology, Beijing, 100081, China 6. School of Instrumentation Science and Opto-electronics Engineering, Beijing University of Aeronautics & Astronautics, Beijing, 100191, China |
| Abstract: | It has been observed that low temperature, rainfall, snowfall, frost have never occurred over the past 50 years in the southern China, and weather in this area is very complex, so the monitoring equipments are few. Optical and thermal infrared remote sensing is influenced much by clouds, so the passive microwave Advanced Microwave Scanning Radiometer-Earth Observing System(AMSR-E) data are the best choice to monitor and analyze the development of disaster. In order to improve estimation accuracy, the dynamic learning neural network was used to retrieve snow depth. The difference of brightness temperatures of TB18.7V and TB36.5V, TB18.7H and TB36.5H, TB23.8V and TB89 V, TB23.8H and TB89 H are made as four main input nodes and the snow depth is the only one output node of neural network. The mean and the standard deviation of retrieval errors are about 4.8 cm and 6.7 cm relative to the test data of ground measurements. The application analysis indicated that the neural network can be utilized to monitor the change of snow intensity distribution through passive microwave data in the complex weather of the southern China. |
| Keywords: | snowstorm neural network snow depth passive microwave Advanced Microwave Scanning Radiometer-Earth Observing System(AMSR-E) |
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