| Seasonal Transition Features of Large-Scale Moisture Transport in the Asian-Australian Monsoon Region |
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| 作者姓名： | 何金海 孙丞虎 刘芸芸 李维京 |
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| 作者单位： | [1]Department of Atmospheric Sciences, Najing University of Information Science and Technology, Nanjing, 210044 [2]Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing, 100081 [3]Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, Tokyo, Japan |
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| 基金项目： | 国家自然科学基金，广东省自然科学基金 |
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| 摘 要： | Using NCEP/NCAR reanalysis data for the period of 1957-2001, the climatological seasonal transition features of large-scale vertically integrated moisture transport （VIMT） in the Asian-Australian monsoon region are investigated in this paper. The basic features of the seasonal transition of VIMT from winter to summer are the establishment of the summertime ＂great moisture river＂ pattern （named the GMR pattern） and its eastward expansion, associated with a series of climatological events which occurred in some ＂key periods＂, which include the occurrence of the notable southerly VIMT over the Indochina Peninsula in mid March, the activity of the low VIMT vortex around Sri Lanka in late April, and the onset of the South China Sea summer monsoon in mid May, among others. However, during the transition from summer to winter, the characteristics are mainly exhibited by the establishment of the easterly VIMT belt located in the tropical area, accompanied by some events occurring in ＂key periods＂. Further analyses disclose a great difference between the Indian and East Asian monsoon regions when viewed from the meridional migration of the westerly VIMT during the seasonal change process, according to which the Asian monsoon region can be easily divided into two parts along the western side of the Indochina Peninsula and it may also denote different formation mechanisms between the two regions.
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| 关 键 词： | 大尺度 水汽输送 亚洲-澳洲季风区 季节性变换 |
| 收稿时间： | 2005-12-26 |
| 修稿时间： | 2006-05-10 |
Seasonal transition features of large-scale moisture transport in the Asian-Australian monsoon region |
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| He?Jinhai,Sun?Chenghu,Liu?Yunyun,Jun?Matsumoto,Li?Weijing.Seasonal Transition Features of Large-Scale Moisture Transport in the Asian-Australian Monsoon Region[J].Advances in Atmospheric Sciences,2007,24(1):1-14. |
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| Authors: | He Jinhai Sun Chenghu Liu Yunyun Jun Matsumoto Li Weijing |
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| Affiliation: | Department of Atmospheric Sciences, Najing University of Information Science and Technology, Nanjing, 210044,Department of Atmospheric Sciences, Najing University of Information Science and Technology, Nanjing, 210044;
Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing, 100081,Department of Atmospheric Sciences, Najing University of Information Science and Technology, Nanjing, 210044; Department of Atmospheric Sciences, Najing University of Information Science and Technology, Nanjing, 210044,Department of Earth and Planetary Science, Graduate School of Science,
The University of Tokyo, Tokyo, Japan,Laboratory for Climate Studies, National Climate Center, China Meteorological Administration, Beijing, 100081 |
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| Abstract: | Using NCEP/NCAR reanalysis data for the period of 1957-2001, the climatological seasonal transition features of large-scale vertically integrated moisture transport (VIMT) in the Asian-Australian monsoon region are investigated in this paper. The basic features of the seasonal transition of VIMT from winter to summer are the establishment of the summertime "great moisture river" pattern (named the GMR pattern)and its eastward expansion, associated with a series of climatological events which occurred in some "key periods", which include the occurrence of the notable southerly VIMT over the Indochina Peninsula in mid March, the activity of the low VIMT vortex around Sri Lanka in late April, and the onset of the South China Sea summer monsoon in mid May, among others. However, during the transition from summer to winter, the characteristics are mainly exhibited by the establishment of the easterly VIMT belt located in the tropical area, accompanied by some events occurring in "key periods". Further analyses disclose a great difference between the Indian and East Asian monsoon regions when viewed from the meridional migration of the westerly VIMT during the seasonal change process, according to which the Asian monsoon region can be easily divided into two parts along the western side of the Indochina Peninsula and it may also denote different formation mechanisms between the two regions. |
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| Keywords: | seasonal transition moisture transport Asian-Australian monsoon |
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