The evaluation of FY-3C snow products in the Tibetan Plateau
MIN Wenbin1(), PEN Jun1, Li Shiying2
1. Institute of Plateau Meteorology, CMA /Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610071, China 2. Sichuan Meteorological Sounding Data Center, Chengdu 610071, China
In order to understand the regional reliability of the Fengyun-3C(FY-3C) satellite snow products, the authors used the snow cover data of 118 meteorological stations in the Tibetan Plateau from October 1, 2018 to April 30, 2019 to evaluate the snow cover (MULSS_SNC) and snow water equivalent (MWRIX_SWE) products. The results show that, for snow cover pixels of MULSS_SNC and MWRIX_SWE, the accuracy rate is 87.18% and 72.32% respectively, the recall rate is 66.67% and 49.63% respectively, the false rate is 12.81% and 27.68% respectively, and the missing rate is 33.33% and 50.37% respectively. In terms of mixed pixels or pixels with snow depth less than 0.5 cm, both MULSS_SNC and MWRIX_SWE tend to identify with no snow, and the missing rate of snow depth less than 1cm is up to 60%. When the snow depth of MULSS_SNC is more than 2cm, the recall rate can reach 89.09%. However, for MWRIX_SWE, only when the snow depth is more than 5cm can the snow recall rate reach 63.37%. The snow depth in the Tibetan Plateau from MWRIX_SWE has a large error with ground observations, and there is no linear positive correlation, so it is not recommended to use it directly.
闵文彬, 彭骏, 李施颖. 青藏高原FY-3C卫星积雪产品评估[J]. 国土资源遥感, 2021, 33(1): 145-151.
MIN Wenbin, PEN Jun, Li Shiying. The evaluation of FY-3C snow products in the Tibetan Plateau. Remote Sensing for Land & Resources, 2021, 33(1): 145-151.
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2021, Vol. 33 
), 彭骏1, 李施颖2
