摘要
基于新的气候标准场(1971-2000年),对ENSO事件的定义及表征特征值作了综合评述。根据海洋尼诺指数ONI,确定了1951-2007年的ENSO事件,计18次暖事件和13次冷事件。通过对1951年以来逐月资料的统计分析,对ENSO的主要指数进行了相关分析,定义了ENSO事件的强度指数,并确定了1997-1998年发生的是自1951年以来最强的暖事件。
Based on a new sea surface temperature(SST) climatology for the base period 1971 -2000, a review is given for the definition of ENSO events and their indices. According to the oceanic Nifio index (ONI) since 1951, 18 El Nifio events 'and 13 La Nina events were identified. Finally, ENSO events and their intensities from 1951 through 2007 were classified. Result shows that the El Nino events that occurred in 1997 and early 1998 was the strongest since 1950.
出处
《自然灾害学报》
CSCD
北大核心
2009年第4期18-24,共7页
Journal of Natural Disasters
基金
国家自然科学基金资助项目(40771039)
四川省教育厅重点资助项目(2005A110)
关键词
ENSO
特征值
强度
ONI
ENSO
characteristic index
intensity
ONI( oceanic Nino index)