摘要
1997年爆发了20世纪以来最强的一次厄尔尼诺事件。此次ElNin～o事件的发生,与赤道中、西太平洋地区大气季节内振荡(ISO)在1996年冬到1997年春的异常增强有重要关系。西太平洋暖池次表层海温(SOT)正距平沿温跃层东传到赤道东太平洋并向海洋表层扩展是ElNin～o事件爆发的直接原因。1997～1998年的ElNin～o事件爆发后,引起全球大气环流和世界许多地区的气候异常,导致一些国家和地区多雨洪涝,另外一些国家和地区高温少雨和严重干旱。
Evidence has shown that the El Ni(n)o event that occurred in 1997 and early 1998 was the strongest in the 20^(th) century. The 1997 El Ni(n)o occurrence is closely related to the abnormal enhancement of the atmospheric intraseasonal oscillation over the equatorial central and eastern Pacific region during the period from the winter of 1996 to the spring of 1997. The eastward propagating of the positive anomalies of subsurface ocean temperature in the western Pacific Ocean warm pool region along the equatorial Pacific therocline to the equatorial eastern Pacific and their expanding to the sea surface are the direct reason to cause 1997—1998 El Ni(n)o Event. It results in the anomalies of global atmospheric circulation and climate, heavy rainfall even floods in some countries and regions, but high temperature,scarce rainfall and even severe droughts in some other countries and regions.
出处
《东海海洋》
2004年第3期1-8,共8页
Donghai Marine Science
关键词
厄尔尼诺
西太平洋暖池
次表层海温异常
季节内振荡
气候异常
El Ni(n)o
western Pacific warm pool
subsurface ocean temperature anomaly(SOTA)
intraseasonal oscillation
climatic anomaly
