首页 | 本学科首页   官方微博 | 高级检索  
     检索      

热带、副热带海陆分布与青藏高原在亚洲夏季风形成中的作用
引用本文:梁潇云,刘屹岷,吴国雄.热带、副热带海陆分布与青藏高原在亚洲夏季风形成中的作用[J].地球物理学报,2006,49(4):983-992.
作者姓名:梁潇云  刘屹岷  吴国雄
作者单位:1.中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京 100029 2 国家气候中心,北京 100081
基金项目:中国科学院重要方向刨新项目(ZKCX2-SW-210)和国家自然科学基金(40135020,40475027,40221503和40023001)共同资助.
摘    要:通过一系列的理想数值试验,研究了亚、非地区热带次尺度的海陆分布和青藏高原大地形在亚洲夏季风形成中的作用.试验结果显示:海陆分布的存在以及海陆分布的几何形状对亚洲夏季风的形成有非常重要的影响.下垫面全是海洋,没有陆地时,无季风现象的存在.当仅有副热带大尺度陆地,而缺乏南亚次尺度陆地和非洲大陆热带陆地时,夏季无明显的越赤道气流,仅在欧亚副热带陆地的东南部有弱的季风,无印度、孟加拉湾和南海夏季风.中南半岛、印度半岛和非洲大陆热带陆地的存在,在夏季引导南半球的东南信风越赤道转向为西南气流,使得南海的北部、中南半岛、孟加拉湾和印度半岛、阿拉伯海上空的低层为强西南气流控制,印度、孟加拉湾和南海夏季风产生.副热带陆地向热带的深入对副热带陆上产生夏季强对流性降水起着至关重要的作用.青藏高原的存在加强了高原东侧的季风,使得季风区向北发展,青藏高原对东亚季风起放大器的作用;减弱了高原西侧的季风,使得季风区向南收缩.

关 键 词:热带和副热带  海陆分布  青藏高原  亚洲夏季风  数值试验  孟加拉湾夏季风  南海夏季风  印度夏季风  
文章编号:0001-5733(2006)04-0963-10
收稿时间:2005-02-22
修稿时间:2005-02-222006-03-15

Roles of tropical and subtropical land_sea distribution and the Qinghai_Xizang Plateau in the formation of the Asian summer monsoon
LIANG Xiao-Yun,LIU Yi-Min,WU Guo-Xiong.Roles of tropical and subtropical land_sea distribution and the Qinghai_Xizang Plateau in the formation of the Asian summer monsoon[J].Chinese Journal of Geophysics,2006,49(4):983-992.
Authors:LIANG Xiao-Yun  LIU Yi-Min  WU Guo-Xiong
Institution:1.State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China 2 National Climate Center, Beijing 100081, China
Abstract:Roles of tropical land-sea distribution and the Qinghai-Xizang Plateau in the formation of the Asian monsoon are examined through a series of idealized numerical experiments.Results show that the existence and geometric shape of land-sea distribution crucially affect the Asian summer monsoon.In an aqua-planet case,no monsoon is observed.In an experiment in which only the subtropical Eurasian landmass exists while the South Asian and African tropical lands are missing,there is a weak summer monsoon over its southeastern corner,but no evident cross-equatorial flow in summer and no summer monsoon over India,the Bay of Bengal (BOB),or the South China Sea(SCS).The existence of tropical lands such as the Indochina Peninsula,the Indian Peninsula and the African continent,induces cross-equatorial flows and strong low-level southwesterlies over the tropical regions,leading to the formation of the Asian summer monsoon over India,the BOB,and the SCS.The extension of the subtropical continent into the tropics greatly enhances the summer convective rainfall over the subtropical land.The Qinghai-Xizang Plateau works the East Asian monsoon as an amplifier,makes it strengthen and develop northward.However,the South Asian monsoon becomes weak and shrinks southward under effects of the Qinghai-Xizang Plateau.
Keywords:Tropic and subtropic  Land-sea distribution  Qinghai-Xizang Plateau  Asian summer monsoon  Numerical simulation  Bay of Bengal summer monsoon  South China Sea summer monsoon  Indiansummer monsoon
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《地球物理学报》浏览原始摘要信息
点击此处可从《地球物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号