祝从文,Tetsuo Nakazawa,李建平. 2004. 大气季节内振荡对印度洋—西太平洋地区热带低压/气旋生成的影响[J]. 气象学报, 62(1):42-50, doi:10.11676/qxxb2004.005
大气季节内振荡对印度洋—西太平洋地区热带低压/气旋生成的影响
MODULATION OF TROPICAL DEPRESSION/CYCLONE OVER THE INDIAN-WES TERN PACIFIC OCEANS BY MADDEN-JULIAN OSCILLATION
投稿时间:2003-03-03  修订日期:2003-07-31
DOI:10.11676/qxxb2004.005
中文关键词:  大气季节内振荡(MJO)  EOF  热带低压/气旋生成
英文关键词:Madden-Julian Oscillation(MJO)  Tropical depression/cyclone formation
基金项目:国家自然科学基金(40375014);国家教委海外归国留学人员启动基金;中国科学院大气物理研究所LASG开放课题
作者单位
祝从文 中国气象科学研究院, 北京, 100081
中国科学院大气物理研究所, LASG, 北京, 100029 
Tetsuo Nakazawa 日本气象研究所, Tsukuba 305-0051 
李建平 中国气象科学研究院, 北京, 100081 
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中文摘要:
      文中利用EOF分析大气季节内振荡(MJO)的时空变化的方法,研究了1996年9月~1997年6月间的MJO活动对生成在印度洋—西太平洋海域的热带低压/气旋的影响。结果发现,除西北太平洋之外,发生在其他区域的热带低压/气旋有半数以上生成在向东移动的MJO的湿位相中。伴随MJO的向东传播,热带低压/气旋平均生成位置也随之向东移动,而生成在西北太平洋的热带低压/气旋分别受到向东和向西传播的MJO影响。
英文摘要:
      The Madden-Julian Oscillation(MJO) is a dominant mode ofintraseasonal variability in the tropical atmosphere;it is characterized by an eastward propagating tropical convective anomalies and associated with circulation anomalies with a time period between 30 to 60 days.Since Madden and Julian firstly observed the MJO (Madden and Julian,1971),it has been extensively studied in the past decades.Studies suggested that the MJO has a baroclinic mixed Kelvin and Rossby wave structure in the Indian and the western Pacific Oceans,where the equatorial wave is strongly coupled to convection with eastward propag ation in convection atroughly 5 m/s. Kelvin waves propagate eastward out of the convective regions is at phase speeds of 10~12 m/s(Hendon and Salby,1994),and is generally manifested as an east ward propagating,equatorialy-trapped,wave number one,baroclinic oscillation in the tropical wind field (Madden and Julian,1994).
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