利用搭载在AQuA和TErrA卫星上的MOdIS(MOdErATE rESOluTIOn IMAgIng SPECTrOrAdIOMETEr)、AMSr-E(AdVAnCEd MICrOWAVE SCAnnIng rAdIOMETEr fOr THE EArTH ObSErVIng SySTEM)传感器测量反演的昼夜海表温度(SST),计算海表面日增温(SEA SurfACE dIurnAl WArMIng),分析南海海表面日增温的短期和年变动特征。受观测平台过境时间、传感器测量SST方式、反演算法等影响,MOdIS/AQuA计算的日增温幅度略大于AMSr-E/AQuA和MOdIS/TErrA,但在表征南海海表面日增温的时空分布特征以及变化趋势上三者并未见显著性差异。南海海表面日增温在时间分布上以冬季为最小,春季为最大;在空间分布上则是南部海域大于中部和北部海域,东部海域大于西部海域。春夏之交的吕宋海峡西北部尤其容易发生日增温事件。海表面日增温与太阳辐射、风速、云量等影响有关,其中风速与海表面日增温显著负相关。Satellite-derived sea surface temperature(SST) data from the MODIS(moderate resolution imaging spectroradiometer)/ Aqua, AMSR-E(advanced microwave scanning radiometer for the earth observing system)/Aqua and MODIS/Terra over the past ~10 years are analyzed to investigate the sea surface diurnal warming in the South China Sea(SCS).The results reveal that sea surface diurnal warming derived by MODIS/Aqua is slightly higher than that by AMSR-E/Aqua and MODIS/Terra, due to the differences in satellite transit time, sampling manner and retrieval algorithm, among others.However, there are no significant biases in terms of spatial and temporal distributions, and of the variation of sea surface diurnal warming over the SCS.The magnitude of sea surface diurnal warming in the SCS is the weakest during winter, and the strongest during spring.The magnitude is generally larger in the southern regions than in the central and northern regions, and is larger in the eastern regions than in the western regions.Northwest of the Luzon Strait, the sea surface diurnal warming tends to appear easily from late spring to early summer.It is suggested that the seasonal variation of sea surface diurnal warming in the SCS be affected by solar radiation, wind speed and cloud amount; among them, the wind speed is the most important factor with a significant negative correlation with the diurnal warming.福建省自然科学基金项目(2011J01278); 国家自然科学基金项目(40706041
