热带气象学报2013，Vol.29Issue(2)：255-261,7.DOI:10.3969/j.issn.1004-4965.2013.02.009
赤道太平洋次表层海温模态在ENSO循环中的作用
ROLE OF EQUATORIAL PACIFIC OCEAN SUBSURFACE OCEANIC TEMPERATURE MODE IN ENSO CYCLE
摘要
Abstract
Based on the simple ocean data assimilation (SODA) reanalysis dataset from University of Maryland and with the method of Empirical Orthogonal Functions (EOF),the characteristics of interannual and interdecadal variability are captured.The first and second modes of the equatorial Pacific subsurface ocean temperature anomaly (SOTA) in the interannual and interdecadal variability are found,respectively,and the second mode in ENSO cycle is discussed.The results show that the first mode of SOTA's interannual and interdecadal variability has a dipole pattern,indicating that the warm and cold phases simultaneously appear in the equatorial subsurface Pacific.The second mode shows coherent large-scale sea temperature anomaly in the equatorial subsurface Pacific,which prominently influences the phase evolution of ENSO cycle.The time series of the second mode has a lead correlation with the Ni（n）o-3.4 index,which makes a precursory prediction signal for ENSO.The function of the prediction factor in SOTA is verified by the composite and case analysises.关键词
ENSO循环/次表层海温异常模态/预测信号/赤道太平洋Key words
ENSO cycle/ subsurface oceanic temperature anomaly mode/ prediction signal/equatorial Pacific Ocean分类
海洋科学引用本文复制引用
刘正奇,刘玉国,哈瑶,张桁正..赤道太平洋次表层海温模态在ENSO循环中的作用[J].热带气象学报,2013,29(2):255-261,7.基金项目
国家重点基础研究计划发展项目(2013CB956203)资助 （2013CB956203）
