Numerical Simulation of Impact of Urbanization on a Precipitation Process: A Case Study of Heavy Rainfall in Kunming

被引：0
|
作者：
Zheng Y. [1 ,2 ]
Liu S. [1 ]
He P. [3 ]
Miao Y. [4 ]
Wang S. [5 ]
机构：
[1] Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing
[2] Zhejiang Meteorological Observatory, Hangzhou
[3] The college of Geography and Tourism Management, Chuxiong Normal University, Chuxiong
[4] Chinese Academy of Meteorological Sciences, Beijing
[5] State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems, China Electric Power Research Institute, Beijing
来源：
He, Ping (heping@cxtc.edu.cn) | 1600年 / Peking University卷 / 53期
关键词：
Precipitation process; Urbanization; WRF model;
D O I：
10.13209/j.0479-8023.2016.128
中图分类号：
学科分类号：
摘要：
A rainstorm process over west of Kunming city during the night of May 24, 2012 is numerically simulated to study the effect of urbanization on the precipitation by using the weather research forecasting model (WRF) numerical model with single-layer urban canopy model. It is found that the precipitation process is well simulated by comparing the spatial distribution of precipitation between the satellite observation and simulated result. The presence of the city changes the latent heat and low level vertical motion over urban area significantly, resulting in slight reduction of the precipitation intensity in the precipitation center and enhancement of the downwind precipitation. The area where precipitation increases coincides with the area where water vapor flux convergence at 750 hPa increases. The reduction of precipitation in center may be due to restraint of the moisture supply in the lower atmosphere by urban underlying. While the increase of precipitation over downwind area may result from the relatively strong vertical motion which transports more water into upper atmosphere. If the urbanization continues expansion from its current level, not only the vertical motion and atmospheric instability but also the limiting of the moisture supply in the lower atmosphere will be enhanced. The combination of these two effects will enlarge the uncertainty of precipitation over downwind area. © 2017 Peking University.
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页码：627 / 638
页数：11
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