亚洲季风季节进程的若干认识  

SOME UNDERSTANDING OF THE SEASONAL MARCH OF ASIAN MONSOONS

作　　者：钱维宏[1] 丁婷[1] 汤帅奇[1] 

机构地区：[1]北京大学物理学院大气科学系,北京100871

出　　处：《热带气象学报》2010年第1期111-116,共6页Journal of Tropical Meteorology

基　　金：国家973计划(2006CB403602;0504);COPES项目(GYHY20070605)共同资助

摘　　要：简要归纳了不同时期随着观测资料的更新对亚洲季风季节进程的若干认识。南海季风试验前,研究认识了东亚季风系统与南亚季风系统的区别。南海季风试验后,对季风进程有了更多的认识,江南副热带雨季开始于4月初,中印半岛热带雨季开始于4月底,南海热带雨季突然建立于5月中旬,都具有半年际的干湿转换。南海中部季风爆发后,亚洲季风在南亚、青藏高原东侧和东亚-太平洋地区全面爆发并由南向北推进。利用近年来高分辨率资料并考虑热带地区半岛陆海地形与热力的影响,认识到亚洲存在5个夏季季风槽与降水相联系的系统,它们分别是西南亚(阿拉伯海)夏季热带季风、南亚(孟加拉湾)夏季热带季风、东南亚(南海)夏季热带季风、西北太平洋夏季热带季风和东亚夏季副热带季风。In this paper, some understanding of the seasonal march of Asian monsoons are summarized, which comes with different degree of updating of the observational data. Before the South China Sea Monsoon Experiment（SCSMEX） in 1998, the differences between the South Asian monsoon and the East Asian monsoon were proposed by Chinese scientists. After the SCSMEX, new understanding of monsoonal march was achieved. In the south of the middle-lower Yangtze River reaches（Jiangnan）, the subtropical rainy season starts from early April. In the Indo-China Peninsula（ICP）, the tropical rainy season begins from late April while the central South China Sea（SCS） rainy season has abrupt onset in mid-May. A dry-wet transition on a half-year scale is found in the regions of subtropical Jiangnan, ICP, and central SCS, respectively. The onset of summer monsoon in the central SCS is followed by a full-scale start of Asian monsoons in South Asia, the east part of the Tibetan Plateau, East Asia and the Northwest Pacific region and their northward advancement northward. With updated high-resolution observational data and by taking into account the regional effect of land-sea topographical and thermal contrasts, five sub-monsoon systems with their monsoon depressions and rainfall are identified surrounding the continent landform of Asia. The systems are named, according to respectively local geography, the Southwest Asian（Arabian Sea） tropical summer monsoon, the South Asian （the Bay of Bengal） tropical summer monsoon, the Southeast Asian（SCS） tropical summer monsoon, the Northwest Pacific tropical summer monsoon, and the East Asian subtropical summer monsoon.

关 键 词：亚洲 西北太平洋 热带季风 副热带季风 季节进程 

分 类 号：P425.42[天文地球—大气科学及气象学]