| 热带环流演变与南海季风爆发 |
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| 引用本文： | 江静,钱永甫.热带环流演变与南海季风爆发[J].南京气象学院学报,2001,24(1):83-91. |
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| 作者姓名： | 江静 钱永甫 |
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| 作者单位： | 南京大学大气科学系, |
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| 基金项目： | 国家自然科学基金重点项目!(No.49735 170 )，《高等学校骨干教师资助计划》项目“南海季风的年际变化及其对我国旱涝的影响”联合资助 |
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| 摘 要： | 利用1958－1997年的NCEP／NCAR再分析资料，分析了南、北半球中低纬环流的气候特征，并讨论了南海夏季风爆发与大尺度环流的关系。研究发现阿拉伯海经向环流管的上升气流和南半球纬向环流管的上升气流在5月份同时到达南海，经向环流管低层的偏西风和纬向环管低层的偏南风共同组成西南风，于是5月份西南季风在南海地区首先爆发。此外，由于青藏高原地形及各经度海陆分布的影响，造成太阳辐射加热不均，是热带夏季风爆发的直接原因，也是南海季风早于印度风爆发的重要原因。
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| 关 键 词： | 南海 季风爆发 热带环流 环流管 夏季 地形 海陆分布 太阳辐射 |
| 修稿时间： | 2000年4月6日 |
Tropical Circulation Evolution and the Onset of the South China Sea Monsoon |
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| Jiang Jing,Qian Yongfu.Tropical Circulation Evolution and the Onset of the South China Sea Monsoon[J].Journal of Nanjing Institute of Meteorology,2001,24(1):83-91. |
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| Authors: | Jiang Jing Qian Yongfu |
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| Abstract: | By using the NCEP/NCAR reanalysis data averaged over 40 years from 1958 to 1997,the climatic characteristics of the tropical circulation in the two Hemispheres are analyzed.The relations between the onset of the South China Sea (SCS) monsoon and the large scale circulation are discussed.It is indicated that the updrafts of the Arabian Sea meridional cell tube and the south zonal cell tube arrive in the SCS at the same time in May,which brings strong convective precipitation.Meanwhile,the westerly of the meridional cell tube and the southerly of the south zonal cell tube combine together to form the southwesterly at the low levels,resulting in the onset of the SCS monsoon.The influences of the Tibetan Plateau and the land sea distribution at different longitudes cause the heating differences of solar radiation,which is the direct cause of the summer monsoon onset,as well as,the cause of the earlier onset in the SCS than in the Indian region. |
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| Keywords: | South China Sea monsoon monsoon onset tropical circulation cell tubes |
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