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《Chinese Journal of Geophysics》 2006-04
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Flow regimes for major topographic obstacles of China

WANG Qi-Wei,TAN Zhe-MinKey Laboratory of Mesoscale Severe Weather/MOE,and Department of Atmospheric Sciences,Nanjing University,Nanjing 210093,China  
Major topographic obstacles in China are taken into account as a whole and approximate scales of these topographies are dynamically idealized according to the theoretical results of mountain flow dynamics.For the typical west-east and north-south upstream flows,the questions are focused on the different flow regimes,such as flow-over/flow-around and quasi-geostrophic balanced or not.The results show that main topographies in China can be classified as three types,one is over-flow dominated and quasi-geostrophic balanced,the second is over-flow dominated but quasi-geostrophic unbalanced,and the third is around-flow dominated and quasi-geostrophic unbalanced.In fact,the primary flow characteristics are determined by not only the scales of the topographies but also their shapes and the upstream flow direction.The rationality of the regimes is validated through qualitative analysis of the flow over the Dabie Mountains and Taiwan Mountains which are numerically simulated using a mesoscale model.
【Fund】: 国家自然科学基金项目(40325014 40333031);; 高等学校博士点基金(20030284019);; 高等学校优秀青年教师教学科研奖励计划FANEDD资助
【CateGory Index】: P433
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