首页 | 官方网站   微博 | 高级检索  
     

1997/1998年El Nino/La Nina期间洋流的演变特征和影响的分析
引用本文:张祖强,丁一汇,赵宗慈.1997/1998年El Nino/La Nina期间洋流的演变特征和影响的分析[J].大气科学,2002,26(1):127-141.
作者姓名:张祖强  丁一汇  赵宗慈
作者单位:国家气候中心,北京,100081
基金项目:“九五”重中之重项目“我国短期气候预测系统的研究”96-908-02-05专题,APN99012、APN200012共同 资助
摘    要:利用TOGA—TAO赤道次表层海流与海温观测资料,比较清楚地揭示了1997/1998年El Nino期间在赤道西太平洋暖池上空西风异常的驱动下,次表层异常海流的产生机制和向东传播过程中的变化特征。对比分析了海表、次表层异常海流的两种热力平流过程,即水平温度平流和因海流水平辐合辐散造成的垂直上翻(或下沉)运动对混合层及海表温度异常的贡献,结果证实了后一效应对ENSO发生发展的重要意义。最后还对文中的海流异常是否就是理论分析得到的Kelvin波在海流场上的反映进行了讨论。

关 键 词:ENSO  海洋次表层  海流异常
修稿时间:2000年7月14日

Evolutions and Roles of Subsurface Sea Currents during the Period of 1997/ 1998 El Nino/ La Nina Event
Zhang Zuqiang. Ding Yihui and Zhao Zongci.Evolutions and Roles of Subsurface Sea Currents during the Period of 1997/ 1998 El Nino/ La Nina Event[J].Chinese Journal of Atmospheric Sciences,2002,26(1):127-141.
Authors:Zhang Zuqiang Ding Yihui and Zhao Zongci
Abstract:In terms of TOGATA- subsurface currents and temperature dataset, observational evi-dences are presented to disclose the formation mechanism and eastward propagation features of subsurface current anomalies driven by the strong westerly wind anomalies over warm poo1 in the west-ern Pacific Ocean during the period of 1997 / 1998 El Nub / La Nina event. Further comparisons sug-gest that the dominant factor leading to the equatorial sea temperature anomaly within the mixed layer of Pacific is the anomalous upwelling caused by the convergence of subsurface currents rather than the horizontal thermal advections of surface currents. Finally, the possibility has been discussed about the assumption that the revealed current anomaly is just the reflection of Kelvin wave obtained in theory.
Keywords:ENSO  subsurface sea  current anomaly
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《大气科学》浏览原始摘要信息
点击此处可从《大气科学》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号