Impacts of Topographic Complexity on Modeling Moisture Transport and Precipitation over the Tibetan Plateau in Summer

作     者：Gudongze LI Haoming CHEN Mingyue XU Chun ZHAO Lei ZHONG Rui LI Yunfei FU Yanhong GAO Gudongze LI;Haoming CHEN;Mingyue XU;Chun ZHAO;Lei ZHONG;Rui LI;Yunfei FU;Yanhong GAO

作者机构：School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Comparative PlanetologyUniversity of Science and Technology of ChinaHefei 230026China Frontiers Science Center for Planetary Exploration and Emerging TechnologiesUniversity of Science and Technology of ChinaHefei 230026China Department of Atmospheric and Oceanic Sciences&Institute of Atmospheric SciencesFudan UniversityShanghai 200433China 

出 版 物：《Advances in Atmospheric Sciences》 (大气科学进展（英文版）)

年 卷 期：2022年第39卷第7期

页      面：1151-1166,I0023,I0024页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：supported by the National Natural Science Foundation of China NSFC (Grant Nos.91837310,42061134009,41775146) the USTC Research Funds of the Double First-Class Initiative (YD2080002007) the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB41000000) 

主　　题：convection-permitting simulation Tibetan Plateau complex topography moisture transport precipitation 

摘      要：The non-hydrostatic global variable resolution model(MPAS-atmosphere)is used to conduct the simulations for the South Asian Summer monsoon season(June,July,and August)in 2015 with a refinement over the Tibetan Plateau(TP)at the convection-permitting scale(4 km).Two experiments with different topographical datasets,complex(4-km)and smooth(60-km)topography,are designed to investigate the impacts of topographical complexity on moisture transport and *** with the observations and reanalysis data,the simulation can successfully capture the general features of key meteorological fields over the TP despite slightly underestimating the inflow through the southern *** results indicate that the complex topography can decrease the inward and outward moisture transport,ultimately increasing the total net moisture transport into the TP by~11%.The impacts of complex topography on precipitation are negligible over the TP,but the spatial distributions of precipitation over the Himalayas are significantly *** the inclusion of complex topography,the sharper southern slopes of the Himalayas shift the lifted airflow and hence precipitation northward compared to the smooth *** addition,more small-scale valleys are resolved by the inclusion of complex topography,which serve as channels for moisture transport across the Himalayas,further favoring a northward shift of ***,the difference between the two experiments with different topography datasets is mainly attributed to their differing representation of the degree of the southern slopes of the Himalayas and the extent to which the valleys are resolved.