| The onset and advance of the Asian summer monsoon |
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| 基金项目： | Acknowledgements The authors appreciate the valuable comments from the anonymous reviewers. The authors are thankful to Prof. Cao Jie for discussing this paper with the present authors and beneficial suggestions. This work was jointly supported by the Innovation Project of the Chinese Academy of Sciences （Grant No. KZCX3-SW-221） and the National Natural Science Foundation of China （Grant Nos. 40233033 and 40365001）. |
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| 摘 要： | The transition from the winter monsoon to summer monsoon is characterized by the abrupt change of the atmospheric circulation. Although many studies on the intraseasonal variation of the Asian summer monsoon (ASM) have been made, there are controversial v…
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| 关 键 词： | 亚洲 季风 夏季 NOAA OLR |
| 收稿时间： | 2005-06-27 |
| 修稿时间： | 2005-06-272005-08-18 |
The onset and advance of the Asian summer monsoon |
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| Authors: | Junmei Lü Qingyun Zhang Shiyan Tao Jianhua Ju |
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| Institution: | (1) State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China;(2) Department of Atmospheric Sciences, Yunnan University, Kunming, 650091, China;(3) China Meteorological Administration Training Centre, Beijing, 100081, China;(4) Graduate School of Chinese Academy of Sciences, Beijing, 100039, China |
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| Abstract: | Based on the daily outgoing longwave radiation (OLR) data from National Oceanic and Atmospheric Administration (NOAA) satellites,
the Climate Prediction Center’s merged analysis of precipitation (CMAP) data and the National Centers for Environmental Prediction/National
Center for Atmospheric Research (NCEP/NCAR) reanalysis dataset, the mean intraseasonal variability of the Asian summer monsoon
(ASM) is investigated by using power spectrum analysis, band-pass filter, and diagnostic analyses. The processes of the onset
and advance of monsoon over the southern part of Indo-china Peninsula, the east coast of Bay of Bengal, the South China Sea
and the Indian subcontinent are explored. It is found that there is an abrupt change in OLR, precipitation and zonal wind
during the onset and advance of the ASM. It is also indicated that the southern part of Indochina Peninsula and the adjacent
Andaman Sea is the region where the earliest onset of the ASM occurs in the 2nd pentad of May. |
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| Keywords: | Asian summer monsoon intraseasonal variability onset advance |
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