| 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 |
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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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