MJO对我国东部春季降水影响的分析

白旭旭; 李崇银; 谭言科; 关志佳

doi:10.3969/j.issn.1004-4965.2011.06.004

MJO对我国东部春季降水影响的分析

doi: 10.3969/j.issn.1004-4965.2011.06.004

1.
解放军理工大学气象学院, 江苏南京 211101; 2. 解放军第61741部队, 北京 100094
2.
解放军理工大学气象学院, 江苏南京 211101; 2. 中国科学院大气物理研究所LASG, 北京 100029
3.
解放军理工大学气象学院, 江苏南京 211101

基金项目: 国家自然科学基金(U0833602)资助

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出版历程
- 收稿日期: 2010-07-30
- 修回日期: 2010-11-16

ANALYSIS OF THE MADDEN-JULIAN OSCILLATION IMPACTS ON THE SPRING RAINFALL IN EAST CHINA

1.
Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China; 2. 61741 Troops of PLA, Beijing 100094, China
2.
Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China; 2. Institute of Atmospheric Physics, LASG, Beijing 100029, China
3.
Institute of Meteorology, PLA University of Science and Technology, Nanjing 211101, China

摘要

摘要: 利用澳大利亚气象局的MJO(Madden-Julian Oscillation)指数,通过位相合成及对比分析研究了MJO对我国东部春季降水的影响。研究表明,当MJO传播至中东印度洋时,我国长江中下游地区的春季降水为正异常,当其进一步东传至中南半岛-印尼群岛一带时,我国华南地区的春季降水为正异常,而在其他活动阶段不利于我国东部的春季降水。对比分析表明,MJO的活动主要通过引起大尺度环流异常、对流层中低层涡度及水汽输送的异常,进而对我国东部春季降水产生明显的影响。
- MJO活动 /
- 中国东部春季降水 /
- 环流异常 /
- 水汽通量散度异常
Abstract: Phase composite analyses have been conducted to investigate the possible effects of the Madden-Julian oscillation (MJO) on the spring rainfall anomalies in East China by using the Real-time Multivariate MJO (RMM) index from Australian Meterological Bureau. The results show that the rainfall anomalies in the mid-lower Valley of Yangtze River are positive when the MJO shifts eastward to the mid-eastern Indian Ocean, and the rainfall anomalies in southern China are positive when the MJO moves further eastward to the vicinity of Indo-China Peninsula and Indonesia, whereas spring rainfall anomalies in East China are negative in the other MJO episodes. The MJO impacts on the precipitation in East China result from the changes in large-scale atmospheric circulation together with the vorticity and vapor transportation at mid-lower levels in the troposphere.
- MJO activity /
- spring precipitation in East China /
- atmospheric circulation anomalies /
- vapor flux divergence anomalies

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参考文献(29)

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