A three-dimensional WRF-based precipitation equation and its application in the analysis of roles of surface evaporation in a torrential rainfall event
A three-dimensional WRF-based precipitation equation and its application in the analysis of roles of surface evaporation in a torrential rainfall event
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基于WRF的三维降水方程及其在暴雨过程中地表蒸发作用分析中的应用
DOI：
10.1016/j.atmosres.2015.09.026
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发表时间：
2016-03
影响因子：
5.5
通讯作者：
Xiaofan Li
中科院分区：
文献类型：
--
作者：
Yongjie Huang;Xiaopeng Cui;Xiaofan Li
基于天气研究与预报（WRF）模型中水种的控制方程，得到了基于WRF的三维地表降水方程，并将其应用于暴雨事件的地表降雨过程研究。进行敏感性实验以进一步探讨地表蒸发在强降雨事件中的作用。结果表明，水汽相关过程（QWV，包括水汽局部变化（QWVL）、表面蒸发（QWVE）、水汽平流（QWVA）等）对降水的贡献在暴雨过程中占主导地位，而云相关过程（QCM）的贡献也起着不可或缺的作用，其最大净贡献可超过20%。QWVA在水汽收支中占主导地位，而QWVL和QWVE的作用较小，但绝不可忽略不计。在事件中。敏感性实验表明，地表蒸发量的变化既影响水汽相关过程，又影响云相关过程，进而影响降水的强度和区域再分布。地表蒸发有利于对流可用势能的积累，增强了大气的不稳定性，容易形成对流系统。同时，它也影响垂直运动和云系统的发展。因此，准确估算地表蒸发量对于准确模拟和预报地表降水是必要的。
Based on the governing equations for water species in the Weather Research and Forecasting (WRF) model, a three-dimensional WRF-based surface precipitation equation was obtained and applied to investigate the surface rainfall processes of a torrential rain event. Sensitivity experiments were performed to further explore roles of surface evaporation in the heavy rainfall event. The results show that the contributions of moisture-related processes to precipitation (QWV, including water vapor local change (QWVL), surface evaporation (QWVE), moisture advection (QWVA), and so on) dominate the torrential rain event, while the contributions of cloud-related processes (QCM) also play indispensable roles whose maximum net contributions could exceed 20%.QWVAdominates the budget of water vapor, whileQWVLandQWVEplay smaller but by no means negligible roles in the event. Sensitivity experiments show that the changes of surface evaporation affect both moisture-related processes and cloud-related processes, and then influence the intensity and regional redistribution of precipitation. Surface evaporation favors the accumulation of convective available potential energy and enhances the instability of atmosphere, being prone to the development of convective systems. Meanwhile, it also affects the development of vertical motions and cloud systems. Thus accurate estimation of surface evaporation is necessary for accurate simulation and forecast of surface precipitation.
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影响因子：
5.5
作者：
Xinyong Shen;Yi Wang;Xiaofan Li
通讯作者：
Xinyong Shen;Yi Wang;Xiaofan Li
影响因子：
8.9
作者：
Xinyong Shen;Yi Wang;Xiaofan Li
通讯作者：
Xinyong Shen;Yi Wang;Xiaofan Li
地形与环境风合并过程及影响的云解析模拟研究
影响因子：
3.1
作者：
Fu, Danhong;Guo, Xueliang
通讯作者：
Guo, Xueliang
影响因子：
3.1
作者：
T. Tsuda;T. Inoue;S. Kato;S. Fukao;D. Fritts;T. Vanzandt
通讯作者：
T. Tsuda;T. Inoue;S. Kato;S. Fukao;D. Fritts;T. Vanzandt
影响因子：
3.2
作者：
J. Srinivasan;G. Smith
通讯作者：
J. Srinivasan;G. Smith