ENSO 循环过程中逐月海温异常的合成分析

文章基于UK和MIT 1990年整编的12年（1968～1977年和1982～1983年）逐月5°×5°经纬网格点的海温（SST）距平资料，对其间发生的4次El Nino事件和3次La Nina事件作了逐月全球SST异常分布的合成分析。合成结果表明:在El Nino事件的形成阶段，赤道中太平洋存在明显的东传暖性低频扰动；而在La Nina事件的形成阶段，南北美沿岸有稳定增强的冷中心向西发展。

Composite Analyses of Monthly Sea Surface Temperature Anomalies Associated with the ENSO Cycle

Based on 5o×5o latitude-longitude grid SST departure data, which was edited by UK and MIT in 1990 for the years of 1968~1977 and 1982~1983, the monthly global SST departure composite analyses for four El Nino events and three La Nina events during the two periods have been conducted. The results show that some warming low-frequency fluctuation centers travel obviously eastward along the equator during onset phase of El Nino event, while stable strengthening cold centers extend westward along the Pacific coast of South-North America during onset phase of La Nina event.