关于ENSO本质的进一步研究

A Further Study of Essence of the ENSO

基于ENSO是热带太平洋海气相互作用产物的科学观点,一系列的分析研究表明:赤道太平洋次表层海温异常(SOTA)有明显的年际变化(循环),并且与ENSO发生密切相关;ENSO的真正源区在赤道西太平洋暖池,赤道西太平洋暖池正(负)SOTA沿赤道温跃层东传到东大平洋,导致ElNino(La Nina)的爆发;在暖池正(负)SOTA沿赤道温跃层东传的同时,将有负(正)SOTA沿10°N和10°S两个纬度带向西传播,从而构成SOTA的循环;热带太平洋SOTA年际循环的驱动者主要是山异常东亚季风所引起的赤道西太平洋纬向风的异常。进而,可以提出关于ENSO本质的一种新理论,即ENSO实质上主要是由异常东亚季风引起的赤道西太平洋异常纬向风所驱动的热带太平洋次表层海温距平的年际循环。

Based on a scientific viewpoint: The ENSO results from air-sea interaction in the tropical Pacific Ocean region, some analyses are complcled wilh the JEDAC data and NCEP reanalysis data in this study. The results show that: The subsurface ocean temperature anomalies (SOTA) exist interannual cycle which is closely related to the ENSO; The occurrence of El Nino (La Nina) is directly associated with positive (negative) SOTA in the warm pool and its eastward propagation along the equatorial thermocline; Real originate of the ENSO is in warm pool of the equatorial western Pacific; The interannual cycle of SOTA in the tropical Pacific is driven by zonal wind anomaly over the equator ial western Pacific which is caused mainly by anomalous East-Asian winter monsoon. Further, a new theory on the ENSO cycle is advanced in this study, i. e., the ENSO is interannual cycle of SOTA in the tropical Pacific driven by zonal wind anomaly over the equatorial western Pacific which is caused main ly by anomalous East-Asian winter monsoon.