气候变化领域集成服务门户(CCPortal): Improved representation of the diurnal variation of warm season precipitation by an atmospheric general circulation model at a 10 km horizontal resolution

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DOI	10.1007/s00382-019-04943-6
	Improved representation of the diurnal variation of warm season precipitation by an atmospheric general circulation model at a 10 km horizontal resolution
	Kim H.; Lee M.-I.; Cha D.-H.; Lim Y.-K.; Putman W.M.
发表日期	2019
ISSN	0930-7575
起始页码	6523
结束页码	6542
卷号	53 期号:11
英文摘要	This study investigates the diurnal variation of the warm season precipitation simulated by the Goddard Earth Observing System version 5 atmospheric general circulation model for 2 years (2005–2006) at a horizontal resolution of 10 km. The simulation was validated with the satellite-derived Tropical Rainfall Measuring Mission (TRMM) 3B42 precipitation data and the Modern-Era Retrospective analysis for Research and Applications atmospheric reanalysis for atmospheric winds and moisture. The simulation is compared with the coarse-resolution run in 50 km to examine the impacts driven by resolution change. Overall, the 10 km model tends to reproduce the important features of the observed diurnal variation, such as the amplitude and phase at which precipitation peaks in the evening on land and in the morning over the ocean, despite an excessive amplitude bias over land. The model also reproduces the realistic propagation patterns of precipitation in the vicinity of ocean coasts and major mountains. The regional characteristics of the diurnal precipitation over two regions, the Bay of Bengal and the Great Plains in North America, are examined in detail, where the observed diurnal cycle exhibits a systematic transition in the peak phase due to the development and propagation of regional-scale convective systems. The model is able to reproduce this pattern as well as the diurnal variation of low-level wind and moisture convergence; however, it is less effective at representing the nocturnal peak of precipitation over the Great Plains. The model results suggest that increasing the horizontal resolution of the model to 10 km substantially improves the representation of the diurnal precipitation cycle. However, intrinsic model deficiencies in topographical precipitation and the accurate representation of mesoscale convective systems remain a challenge. © 2019, The Author(s).
英文关键词	Diurnal variation; General circulation model; Horizontal resolution; Precipitation
语种	英语
scopus关键词	atmospheric dynamics; diurnal activity; general circulation model; image resolution; mesoscale meteorology; precipitation assessment; precipitation intensity; seasonal variation; Bay of Bengal; Great Plains; Indian Ocean
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/145823
作者单位	School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Goddard Earth Science, Technology, and Research/I.M. Systems Group, Greenbelt, MD, United States
推荐引用方式 GB/T 7714	Kim H.,Lee M.-I.,Cha D.-H.,et al. Improved representation of the diurnal variation of warm season precipitation by an atmospheric general circulation model at a 10 km horizontal resolution[J],2019,53(11).
APA	Kim H.,Lee M.-I.,Cha D.-H.,Lim Y.-K.,&Putman W.M..(2019).Improved representation of the diurnal variation of warm season precipitation by an atmospheric general circulation model at a 10 km horizontal resolution.Climate Dynamics,53(11).
MLA	Kim H.,et al."Improved representation of the diurnal variation of warm season precipitation by an atmospheric general circulation model at a 10 km horizontal resolution".Climate Dynamics 53.11(2019).