Based on the hourly sea surface temperature(SST)data from National Marine Environment Forecasting Center and ERA5 datasets from European Center for Medium Weather Forecasting,the characteristics and influencing factors of diurnal variation of sea surface temperature(DSST)over the South China Sea are studied in this article.The results show that the climatology of DSST exhibits a zonal variation with a mean value of about 0.56℃.Also,the amplitude of DSST in offshore areas is larger while the frequency of warming events of DSST exceeding 1.5℃ is rare.The DSST shows significant seasonal variation character-istics with peak in spring(about 0.7℃)and valley in winter(about 0.2～0.3℃).This is mainly due to the seasonal variations of diurnal variation of net radiation flux and the wind speed over the South China Sea.Totally,the seasonal DSST increases along with the increase of diurnal variation of net radiation flux and the decrease of mean wind speed.Meanwhile,the South China Sea monsoon also plays an important role in the seasonal variation of DSST.The SST in the South China Sea also has an obvious diurnal cycle,which commonly reaches the peak at 16 p.m.and the valley at 8 a.m.The main factor affecting SST diurnal cycle in the South China Sea is the diurnal cycle of net radiation flux,while the influence of wind speed is relatively small.
维普
万方数据