气候变化领域集成服务门户(CCPortal): Using 4-km WRF CONUS simulations to assess impacts of the surface coupling strength on regional climate simulation

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DOI	10.1007/s00382-019-04932-9
	Using 4-km WRF CONUS simulations to assess impacts of the surface coupling strength on regional climate simulation
	Chen L.; Li Y.; Chen F.; Barlage M.; Zhang Z.; Li Z.
发表日期	2019
ISSN	0930-7575
起始页码	6397
结束页码	6416
卷号	53 期号:2020-09-10
英文摘要	Uncertainties in representing land–atmosphere interactions can substantially influence regional climate simulations. Among these uncertainties, the surface exchange coefficient Ch is a critical parameter, controlling the total energy transported from the land surface to the atmosphere. Although it directly impacts the coupling strength between the surface and atmosphere, it has not been properly evaluated for regional climate models. This study assesses the representation of surface coupling strength in a stand-alone Noah-MP land surface model and in coupled 4-km Weather Research and Forecasting (WRF) model simulations. The data collected at eight FLUXNET sites of the Canadian Carbon Program and seven AMRIFLUX sites are used to evaluate the offline Noah-MP simulations. Nine of these FLUXNET sites are used for the evaluation of the coupled WRF simulations. These sites are categorized into three land use types: grassland, cropland, and forest. The surface exchange coefficients derived using three formulations in Noah-MP simulations are compared to those calculated from observations. Then, the default Czil = 0 and new canopy-height dependent Czil are used in coupled WRF simulations over the spring and summer in 2006 to compare their effects on surface heat flux, temperature, and precipitation. When the new canopy-height dependent Czil scheme is used, the simulated Ch exchange coefficient agrees better with observation and improves the daily maximum air temperature and heat flux simulation over grassland and cropland in the US Great Plains. Over grassland, the modeled Ch shows a different diurnal cycle than that for observed Ch, which makes WRF lag behind the observed diurnal cycle of sensible heat flux and temperature. The difference in precipitation between the two schemes is not as clear as the temperature difference because the impact of changing Ch is not local. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Land–atmosphere interaction; Surface coupling strength; Surface exchange coefficient; Surface fluxes
语种	英语
scopus关键词	air-sea interaction; computer simulation; diurnal variation; heat flux; regional climate; surface flux; weather forecasting; United States
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/145861
作者单位	CAS Key Laboratory of Regional Climate Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences (CAS), Beijing, China; Global Institute for Water Security, University of Saskatchewan, 11 Innovation Boulevard, Saskatoon, SK S7N 3H5, Canada; National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Chen L.,Li Y.,Chen F.,et al. Using 4-km WRF CONUS simulations to assess impacts of the surface coupling strength on regional climate simulation[J],2019,53(2020-09-10).
APA	Chen L.,Li Y.,Chen F.,Barlage M.,Zhang Z.,&Li Z..(2019).Using 4-km WRF CONUS simulations to assess impacts of the surface coupling strength on regional climate simulation.Climate Dynamics,53(2020-09-10).
MLA	Chen L.,et al."Using 4-km WRF CONUS simulations to assess impacts of the surface coupling strength on regional climate simulation".Climate Dynamics 53.2020-09-10(2019).