一个热带太平洋距平模式对风应力异常的响应  

RESPONSE OF A TROPICAL PACIFIC ANOMALY MODEL TO WIND STRESS ANOMALIES

作　　者：张恩才[1] 杨修群[1] 

机构地区：[1]南京大学大气科学系,南京210093

出　　处：《气象科学》1996年第3期206-214,共9页Journal of the Meteorological Sciences

基　　金：国家气候中心开放实验室资助;国家自然科学基金

摘　　要：本文利用1970至1989年共20年的逐月平均的太平洋地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循环的年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事件是一根本性的信号，它足以能够产生主要位于赤道中东太平洋地区的ELNino或反ELNino事件。另外，本文还探讨了模式海洋分辨率对模拟结果的影响，指出了高分辨率仅对冷事件的准确模拟有重要作用。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.

关 键 词：海洋模式 风应力 应力异常 厄尔尼诺 太平洋 

分 类 号：P732.3[天文地球—海洋科学]