摘要
分析了1956年以来两类ENSO事件热带太平洋海温距平场的特征,结果指出,东部型E1Nino事件前期为LaNina事件年,热带中东太平洋为强的海温负距平,东部型LaNina事件前期为ElNino事件年,热带中东太平洋为强的海温正距平;中部型ElNino事件前期热带中西太平洋多为明显的海温正距平,中部型LaNina事件前期热带东太平洋多为明显的海温负距平。两类ENSO事件前期海温距平场特征基本相反。就热带西太平洋暖池海域而言,中部型ElNino事件前期暖池处于偏暖状态,东部型ElNino事件前期则处于偏冷状态。西太平洋暖池处于偏暖状态是中部型ElNino事件发生的必要条件。
he oceanic feature in the tropical Pacific Ocean one year before the two types of ENSO event was analyzed. The results show that, one year before the eastern pattern El Nino events onset, the La Nina events occured, in which the SST was extremely colder than normal in eastern and central tropical Pacific Ocean; one year before the eastern pattern La Nina events onset,the El Nino events occured, when the SST was extremaly warmer than normal in eastern and central tropical Pacific Ocean. There were much warmer SST in the tropical western and central Pacific Ocean before the Central pattern El Nino events onset, and much colder SST in the tropical eastern Pacific Ocean before the central pattern La Nina events onset. Warmer SST in the tropical weatern Pacific warm pool region is an essential condition for the onset of central pattern of El Nino events.
出处
《热带气象学报》
CSCD
北大核心
1998年第3期226-232,共7页
Journal of Tropical Meteorology
基金
国家"九五"重中之重项目