气候变化领域集成服务门户(CCPortal): Impact of radiation frequency; precipitation radiative forcing; and radiation column aggregation on convection-permitting West African monsoon simulations

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DOI	10.1007/s00382-018-4187-2
	Impact of radiation frequency; precipitation radiative forcing; and radiation column aggregation on convection-permitting West African monsoon simulations
	Matsui T.; Zhang S.Q.; Lang S.E.; Tao W.-K.; Ichoku C.; Peters-Lidard C.D.
发表日期	2020
ISSN	0930-7575
起始页码	193
结束页码	213
卷号	55
英文摘要	In this study, the impact of different configurations of the Goddard radiation scheme on convection-permitting simulations (CPSs) of the West African monsoon (WAM) is investigated using the NASA-Unified WRF (NU-WRF). These CPSs had 3 km grid spacing to explicitly simulate the evolution of mesoscale convective systems (MCSs) and their interaction with radiative processes across the WAM domain and were able to reproduce realistic precipitation and energy budget fields when compared with satellite data, although low clouds were overestimated. Sensitivity experiments reveal that (1) lowering the radiation update frequency (i.e., longer radiation update time) increases precipitation and cloudiness over the WAM region by enhancing the monsoon circulation, (2) deactivation of precipitation radiative forcing suppresses cloudiness over the WAM region, and (3) aggregating radiation columns reduces low clouds over ocean and tropical West Africa. The changes in radiation configuration immediately modulate the radiative heating and low clouds over ocean. On the 2nd day of the simulations, patterns of latitudinal air temperature profiles were already similar to the patterns of monthly composites for all radiation sensitivity experiments. Low cloud maintenance within the WAM system is tightly connected with radiation processes; thus, proper coupling between microphysics and radiation processes must be established for each modeling framework. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Convection-permitting simulation; Low cloud feedback; Radiation feedback; West African monsoon
语种	英语
scopus关键词	aggregation; climate modeling; cloud cover; cloud radiative forcing; convective system; monsoon; precipitation (climatology); West Africa
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/145424
作者单位	NASA Goddard Space Flight Center, Greenbelt, MD, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States; Science Systems and Applications, Inc., Lanham, MD, United States; Science Applications International Corporation, McLean, VA, United States
推荐引用方式 GB/T 7714	Matsui T.,Zhang S.Q.,Lang S.E.,et al. Impact of radiation frequency; precipitation radiative forcing; and radiation column aggregation on convection-permitting West African monsoon simulations[J],2020,55.
APA	Matsui T.,Zhang S.Q.,Lang S.E.,Tao W.-K.,Ichoku C.,&Peters-Lidard C.D..(2020).Impact of radiation frequency; precipitation radiative forcing; and radiation column aggregation on convection-permitting West African monsoon simulations.Climate Dynamics,55.
MLA	Matsui T.,et al."Impact of radiation frequency; precipitation radiative forcing; and radiation column aggregation on convection-permitting West African monsoon simulations".Climate Dynamics 55(2020).