摘要
利用1964~1993年NCEP/NCAR再分析风应力资料和中国科学院大气物理研究所发展的14层热带太平洋环流模式(OGCM),对热带太平洋与El Ni^no有关的年际变化进行了研究。首先,分析了西太平洋暖池次表层海温异常(SOTA)与Ni^no 3区海表温度异常(SSTA)的年际变化关系,发现在El Ni^no事件之前,暖池的次表层海温都有明显正异常出现,它的东传导致了El Ni^no的发生,并且SOTA的传播随纬度变化,沿赤道东传,在赤道外西传。然后,选取了20世纪70年代和80年代两次最强的El Ni^no事件讨论了引起这种机制的可能原因———西风异常的作用。最后,对1964~1993所有的El Ni^no年的风场、次表层海温和海表温度的异常进行了综合分析。
The interannual variability associated with E1 Nin^~o events in the tropical Pacific from 1964 to 1993 was studied, by using of Institute of Atmospheric Physics （IAP） 14L Tropical Pacific OGCM with NCEP/NCAR reanalysis wind stress data, First, we analyse relation of anomalies of subsurface sea temperature in the warm pool and anomalies of surface sea temperature in Nin^~o 3. Results disclose that anomalies of subsurface sea temperature in the warm pool and their eastward propagation have very important and direct effects on the occurrence of E1 Nin^~o and propagations of anomalies of subsurface sea temperature is different in different latitudes. Second, we discuss effect of westerly anomaly by selecting two strongest E1 Nin^~o events. Finally, Composite structure have been described during E1 Nin^~o from 1964 to 1993.
出处
《气候与环境研究》
CSCD
北大核心
2006年第4期457-469,共13页
Climatic and Environmental Research
基金
国家自然科学基金资助项目40233027
关键词
海表温度异常
次表层海温异常
E1
Nin^~o
风应力
sea surface temperature anomalies, subsurface oceanic tempreture anomalies, E1 Nin^~o, wind stress
