基于再分析数据的南海三维温盐结构特征分析OA

Mastering the 3D(three-dimensional)Characteristics of the temperature-salinity field in the South China Sea(SCS)is of great significance for studying SCS dynamic environment and its influence on climate change.Based on the 2020 ocean reanalysis data GLORYS12V1,the horizontal distribution,vertical structure characteristics,and seasonal changes of SCS temperature-salinity are analyzed.The analysis results show that the SCS surface temperature is generally between 25℃ and 32℃ ,and the highest temperature occurs in the waters near Huangyan Island in August.The annual SCS surface salinity is generally between 32 psu and 35 psu,and the highest salinity occurs in July.The vertical structure of temperature-salinity exhibits high temperature and low salinity on the surface layer,and the seasonal variation of temperature-salinity decreases with increasing depth.The depth of the SCS thermocline has obvious seasonal variations and it is greater in autumn and winter than that in spring and summer.According to the variation characteristics of sea surface temperature during Typhoon Rammasun,the response of sea surface temperature to the typhoon process is analyzed.The vertical mixing effect of the SCS water is enhanced and sea surface temperature decreases significantly during typhoon.