首页|Improved Simulation of Summer Heavy Rainfall over Beijing and Henan by the YHGSM with Updated Subgrid Orographic Parameters
Improved Simulation of Summer Heavy Rainfall over Beijing and Henan by the YHGSM with Updated Subgrid Orographic Parameters
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国家科技期刊平台
NETL
NSTL
万方数据
In numerical weather prediction(NWP),the parameterization of orographic drag plays an important role in repres-enting subgrid orographic effects.The subgrid orographic parameters are the key input to the parameterization of oro-graphic drag.Currently,the subgrid orographic parameters in most NWP models were produced based on elevation datasets generated many years ago,with a coarse resolution and low quality.In this paper,using the latest high-qual-ity elevation data and considering the applicable scale range of the subgrid orographic parameters,we construct the orographic parameters,including the subgrid orographic standard deviation,anisotropy,orientation,and slope,that are required as input to the orographic gravity wave drag(OGWD)parameterization.Finally,we introduce the newly constructed orographic parameters into the Yin-He Global Spectral Model(YHGSM),optimize the description of the orographic effect in the model,and improve the simulation of two typical heavy rainfall events in Beijing and Henan.
subgrid orographic parametersorographic dragheavy rainfallYin-He Global Spectral Model(YHGSM)parameterization
Yingjie WANG、Jianping WU、Kaijun REN
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College of Computer Science and Technology,National University of Defense Technology,Changsha 410600
College of Meteorology and Oceanography,National University of Defense Technology,Changsha 410600
National Natural Science Foundation of ChinaNational Natural Science Foundation of China
国家科技期刊平台
NSTL
万方数据
