Impacts of Topographic Complexity on Modeling Moisture Transport and Precipitation over the Tibetan Plateau in Summer
Impacts of Topographic Complexity on Modeling Moisture Transport and Precipitation over the Tibetan Plateau in Summer
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地形复杂性对青藏高原夏季水汽输送和降水模拟的影响
DOI：
10.1007/s00376-022-1409-7
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发表时间：
2022-03
影响因子：
5.8
通讯作者：
Gao Yanhong
中科院分区：
文献类型：
--
作者：
Li Gudongze;Chen Haoming;Xu Mingyue;Zhao Chun;Zhong Lei;Li Rui;Fu Yunfei;Gao Yanhong
非静力全球变分辨率模式（MPAS-大气）进行南亚夏季风季节的模拟（2015年6月，7月和8月），在青藏高原（TP）进行了对流允许尺度（4 km）的改进。两个实验使用不同的地形数据集，复杂（4 km）和平滑（60 km）地形，通过与观测资料和再分析资料的比较，模拟结果虽然略低估了通过TP南部的入流，但仍能成功地捕捉到TP关键气象场的一般特征。复杂地形对青藏高原降水的影响可以忽略不计，但对喜马拉雅地区降水的空间分布有明显的调制作用，随着复杂地形的加入，青藏高原降水的空间分布发生了明显的变化。与平坦的地形相比，喜马拉雅山南坡的陡峭使上升气流和降水向北移动。此外，更多的小规模山谷被复杂的地形所解决，这是喜马拉雅山脉水汽输送的通道，进一步有利于降水的北移。总的来说，使用不同地形数据集的两个实验之间的差异主要归因于它们对南坡程度的不同表示。喜马拉雅山和山谷的解决程度。
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 precipitation.Compared 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 TP.The 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 modulated.With the inclusion of complex topography,the sharper southern slopes of the Himalayas shift the lifted airflow and hence precipitation northward compared to the smooth topography.In 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 precipitation.Overall,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.
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影响因子：
6.8
作者：
Sandu, Irina;Bechtold, Peter;Beljaars, Anton;Bozzo, Alessio;Pithan, Felix;Shepherd, Theodore G.;Zadra, Ayrton
通讯作者：
Zadra, Ayrton
影响因子：
3.1
作者：
Renhe Zhang;T. Koike;Xiangde Xu
通讯作者：
Renhe Zhang;T. Koike;Xiangde Xu
影响因子：
4.9
作者：
K. Landu;L. Leung;S. Hagos;V. Vinoj;S. Rauscher;T. Ringler;M. Taylor
通讯作者：
K. Landu;L. Leung;S. Hagos;V. Vinoj;S. Rauscher;T. Ringler;M. Taylor
影响因子：
4.9
作者：
Travis A. O'Brien;Fuyu Li;William D Collins;S. Rauscher;T. Ringler;M. Taylor;Samson M. Hagos;L. R. Leung
通讯作者：
Travis A. O'Brien;Fuyu Li;William D Collins;S. Rauscher;T. Ringler;M. Taylor;Samson M. Hagos;L. R. Leung
影响因子：
7.4
作者：
Yuyao Zhu;Saini Yang
通讯作者：
Yuyao Zhu;Saini Yang