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根据对1998年南海中部、北部航次的海水盐度观测资料以及GPCP-1DD(Global Precipitation Climatology Project,1 Degree Daily Precipitation Estimate)降雨资料,研究了夏季风期间降雨过程对南海上层盐度的可能影响。个例和合成分析表明,当有降雨过程发生时,降雨对南海上层盐度的影响深度为85—110m,上层盐度恢复所需要的时间为14—42d左右。此外还利用NCEP/NCAR(National Center for Environmental Prediction/National Center for Atmospheric Research)再分析资料的逐月风场资料以及基于法国AVISO(Archiving,Validation and Interpretation of Satellite Oceanographic Data)提供的融合海平面高度异常资料计算的地转流场分析平流效应对其可能产生的影响。
Based on the observed data of seawater salinity in the central and northern South China Sea in 1998 and the rainfall data of the GPCP-1DD (Global Precipitation Climatology Project, 1 Degree Daily Precipitation Estimate), the possible influence of the rainfall process on the salinity of the South China Sea during the summer monsoon period was studied. A case study and a synthetic analysis show that when a rainfall event occurs, the depth of the impact of rainfall on the upper salinity of the South China Sea is 85-110 m, and that of the upper salinity recovery is about 14-42 d. In addition, the monthly wind field data of the NCEP / NCAR (National Center for Environmental Prediction / National Center for Atmospheric Research) reanalysis data and the fusion sea level anomalies based on the method provided by the French AVISO (Archiving, Validation and Interpretation of Satellite Oceanographic Data) The geo-flow field calculated from the data analyzes the possible impact of the advection effect.