风应力对SST气候场和年际变率作用的诊断及数值研究

相关方法分析Nino3区SSTA和风应力的关系，发现前期风应力距平场与Nino3区SSTA有很好的相关关系，这种相关性超前8个月时就有所显现。影响Nino3区SSTA的主要风应力区域的位置随风应力超前的时间缩短均向中太平洋扩展。数值试验方法研究不同区域的风应力对热带太平洋SST作用的结果表明，强相关区域的风应力对形成和维持热带太平洋SST的气候场的作用不明显，而对SST的年际变率有重要贡献；相反，强相关区域以外的风应力对形成和维持热带太平洋SST的气候场起重要作用，但是对SST的年际变率所起的作用很不理想。

Diagnosis and Numerical Study on the Effect of Wind Stress on SST Climatic Field and Interannual Varibility

The correlations of the wind stress anomalies over tropical Pacific and the SSTA in the Nino3 region shows that the Nino3 SSTA is well correlated with the leading wind stress anomalies,which occurs when the wind stress is prior to the Nino3 SSTA by eight months.The location of wind stress in all strong correlation areas expands toward the middle Pacific in pace with shortening the leading time.The result obtained by investigating the effect of the wind stress in different regions on SST in the tropical Pacific by means of numerical method,shows that there is obvious influence of the wind stress in higher correlation regions on developing and sustaining the climatological monthly mean fields of SST in tropical Pacific,but it contributes significantly to the interannual variability of SST;instead,the wind stress outside the higher correlation regions exerts an important influence on developing and sustaining the mean fields of SST,but does a little on the interannual variability of SST.