摘要:
两次非典型厄尔尼诺事件发生期间,Walker环流中的西太平洋部分显着减弱,Hadley环流中的东太平洋部分显着增强.西太平洋距平西风应力增强向东伸展;东太平洋距平北风应力增强向南伸展.西太平洋暖池的能量可以两种方式向东传播:赤道Kelvin波温跃层模态和流速模态.温跃层模态向东输送的总能量大于流速模态向东输送的总能量.1982～1983年厄尔尼诺事件中,赤道Kelvin波温跃层模态起主要作用,赤道潜流减弱;1986～1987年厄尔尼诺事件中,赤道Kelvin波流速模态起主要作用,赤道潜流增强.厄尔尼诺事件期间,赤道潜流消失、反向现象是一种局地性海洋响应,这种现象不伴随赤道Kelvin波向东传播.
Abstract:
During twice untypical El Niňo events,the central westem equatorial Pacifict part of the Walker circulation wad weaken apparently,the central eastern equatorial Pacifc part of the HIadley ctrculation was strengthened apparently.The a nomaly of west wind stress in the western equatorial Pacific was strengthened and extended easward,while thu anommly of north wind stress in the eastern equatorial Pacifie was strengthened and extended southward.Ihe energy of warm pool in the western Pacific may be transported eastward in the ways:the equatorial Kelvin wave themncline model and current model.The total energy which was transported eastward by the themtocline model was more than that by the current model.During the 1982-1983 El Niňo event,the equatorial Kelvin wave themocline model played the main role,EUC was weaken.During the 1986-1987 El Niňo event,the equatorial Kelvin wave current model played the main role,EUC was strengthened.During the twice El Niňo events,the phenanenon of EUC's disappearance and reversion was a local ocean response,is didn't propagate eastward with the equatorial Kelvin wave.
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