气候变化领域集成服务门户(CCPortal): Diurnal cycle of summer precipitation over the Eastern Tibetan Plateau and surrounding regions simulated in a convection-permitting model

CCPortal

DOI	10.1007/s00382-021-05729-5
	Diurnal cycle of summer precipitation over the Eastern Tibetan Plateau and surrounding regions simulated in a convection-permitting model
	Cai S.; Huang A.; Zhu K.; Yang B.; Yang X.; Wu Y.; Mu X.
发表日期	2021
ISSN	0930-7575
起始页码	241
结束页码	252
英文摘要	Based on the hourly gauge-satellite merged precipitation data with the spatial resolution of 0.1° × 0.1° during 2013 ~ 2018, we have evaluated the performance of the convection-permitting Weather Research and Forecasting model at Nanjing University (WRF_NJU) in forecasting the precipitation diurnal variation and the associated atmospheric circulation over the eastern Tibetan Plateau and its surrounding regions during summer. Results indicate that WRF_NJU model can well reproduce the diurnal cycle of the summer precipitation in terms of the diurnal peak time, duration and magnitude. In addition, the eastward propagation of rainfall systems with long duration along the eastern Tibetan Plateau (ETP) and its adjacent areas can also be properly captured. The WRF_NJU model can reasonably reproduce the relevant atmospheric circulation during summer as well. However, the model tends to underestimate the summer precipitation amount (PA) and precipitation frequency (PF) over most time of a day. Relatively larger biases in the occurring time and magnitude of PA and PF diurnal peaks can be noted over the ETP and Sichuan Basin. Further analysis suggests that the underestimation of PA over the ETP is attributed to the much lower moisture supply, weaker low-level southwesterly winds and less convective available potential energy (CAPE) in the WRF_NJU model than in ERA5. Over Sichuan Basin, the underestimated PA is related to the weaker upward motion, which is corresponding to the cold biases of surface air temperature in WRF_NJU. Findings of this study provide the basic model biases and may be helpful to further improve the model physical processes. © 2021, The Author(s).
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/183515
作者单位	State Key Laboratory of Severe Weather and Joint Center for Atmospheric Radar Research of CMA/NJU, School of Atmospheric Sciences, Nanjing University, No.163 Xianlin Avenue, Nanjing, Jiangsu 210023, China; CMA Key Laboratory of Transportation Meteorology, Nanjing Joint Institute for Atmospheric Sciences, Nanjing, 210041, China; CMA-NJU Joint Laboratory for Climate Prediction Studies, School of Atmospheric Sciences, Nanjing University, No.163 Xianlin Avenue, Nanjing, Jiangsu 210023, China; Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, 610225, China
推荐引用方式 GB/T 7714	Cai S.,Huang A.,Zhu K.,et al. Diurnal cycle of summer precipitation over the Eastern Tibetan Plateau and surrounding regions simulated in a convection-permitting model[J],2021.
APA	Cai S..,Huang A..,Zhu K..,Yang B..,Yang X..,...&Mu X..(2021).Diurnal cycle of summer precipitation over the Eastern Tibetan Plateau and surrounding regions simulated in a convection-permitting model.Climate Dynamics.
MLA	Cai S.,et al."Diurnal cycle of summer precipitation over the Eastern Tibetan Plateau and surrounding regions simulated in a convection-permitting model".Climate Dynamics (2021).