摘要:
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本文首先应用子波变换技术对1950~1996年赤道东太平洋的逐月海温距平序列作了分析,发现海温异常存在着明显的准2年、准5年和年代际变化,1977年前后为海温异常的年代际突变时间;然后用全球格点海温资料分析了年代际变化的空间特征,结果指出1977年后赤道东太平洋平均海温比1977年前的28年平均海温增暖0.4~0.5℃,而西北太平洋的海温降低达0.6℃,大西洋北部的年代际降温也达到0.6℃。 |
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参考文献:
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[1] Clivar.A study of climate variability and predictability,Science Plan,August 1995 WCRP-89,WMO/TD No.690. [2] Graham,N.E.,Decadal-scale climate variability in the tropical and North Pacific during the 1970s and 1980s:observations andmodel results.Climat e Dynamics,10:135~162,1994. [3] Wang,B.,Interdecadal changes in El Nino onset in the last four decades.J.Climat e.8:267~285,1995. [4] Rasmusson,E.M.,and Carpent er,T.H.,Variations in tropical sea surface temperature and surface wind fields associated withthe Southern Oscil lat ion/El Nino.Mon.Wea.Rev.,110:354~384,1982. [5] Qian Weihong.The understanding of ENSO cycle mechanism and ENSO potential prediction ability.Acta Meteor.Sinica,11(1):105~118,1997. [6] Angell,J.K.,Comparison of variations in atmospheric quant it ies with sea surface temperature variations in equatorial Eastern Paci-fic,Mon.Wea.Rev.,19:230~243. |
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