Chinese Antarctic Center of Surveying and Mapping;
Wuhan University;
Wuhan 430079;
China;
State Key Laboratory of Severe Weather;
Chinese Academy of Meteorological Sciences;
Beijing 100081;
China;
National Marine Environmental Forecasting Center;
Beijing 100081;
China;
Wuhan Economic&Technological Development Zone(Hannan)Meteorological Services;
Wuhan 430079;
China;
meteorological variables; RF model; estimated historical DGSR; long-term trend analysis;