一个热带太平洋距平模式对风应力异常的响应

本文利用１９７０至１９８９年共２０年的逐月平均的太平着区的表面风应力和海表温度距平的分析资料，检验了以前设计的热带太平洋和热带大气距平模式的模拟性能，通过使用两组风应力异常场即观测场和热带大气模式对观测海温响应所得的模拟场，重点分析了热带太平洋距平模式对风应力异常的响应特征，结果表明，本文海洋距平模式完全有能力再现ＥＮＳＯ循环折际变化性及其水平结构，且赤道中太平洋区域的低频风应力异常对于ＥＮＳＯ事

RESPONSE OF A TROPICAL PACIFIC ANOMALY MODEL TO WIND STRESS ANOMALIES

The performance of a tropical Pacific anomaly model along with a tropical atmospheric anomaly model has been tested by using the objective analysis data of the surface wind stresses and the sea surface temperature(SST) from 1970 through 1989. Especially, the response of the oceanic model to the wind stress anomalies has been depicted with two datasets of willd stresses: one ls the analysis data and the other is the simulated data which is the response of the atmospheric model to the observed SST anomaly. the results show that the present model is capable of reproducing the ENSO variability and its horizontal structure,and the wind stress anomaly in the central equatorial Pacific is the fundamental signal which is sufficient for resulting in an E1 Nino or anti-E1 Nino event in the eastern equatorial Pacific. Furthermore, the possible influence of oceanic horizontal resolution on the simulated results has also been tested. It seems that high resolution can improve the accuracy of simulation only in a cold event.