This study was jointly sponsored by the National Natural Science Foundation of China(41905067,42175052),the Na-tional Key Research and Development Program(2021YFA0718000),the Innovative Development Special Project of China Meteorological Administration(CXFZ2021Z011,CXFZ2021Z010 and CXFZ2022J039),and the science funding from Beijing Meteorological Service(BMBKJ202003005).The computations were conducted on the Shuguang-PI high-per-formance computing platform from the China Meteorological Administration,which is gratefully acknowledged for the generous provision of computational resources.The atmo-spheric circulation and moisture data are from the NCEP/NCAR Reanalysis data(https://psl.noaa.gov/data/gridded/data.ncep.reanalysis.pressure.html).The CPC Merged Analysis of Pre-cipitation(CMAP)dataset are downloaded from https://psl.noaa.gov/data/gridded/data.cmap.html.The ERA5 dataset is download from https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-land-monthly-means?tab=form.NOAA_OI_SST_V2 data provided by the NOAA/OAR/ESRL PSL,Boulder,Colorado,USA,from their Web site at https://psl.noaa.gov/data/gridded/data.noaa.oisst.v2.html.The NCDC snow depth dataset is provided by the Cold and Arid Regions Sciences Data Center at Lanzhou(http://westdc.westgis.ac.cn).The authors also thank Nanjing Hurricane Translation for reviewing the English language quality. （41905067,42175052）