气候变化领域集成服务门户(CCPortal): Dynamical downscaling the impact of spring Western US land surface temperature on the 2015 flood extremes at the Southern Great Plains: effect of domain choice; dynamic cores and land surface parameterization

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DOI	10.1007/s00382-019-04630-6
	Dynamical downscaling the impact of spring Western US land surface temperature on the 2015 flood extremes at the Southern Great Plains: effect of domain choice; dynamic cores and land surface parameterization
	Diallo I.; Xue Y.; Li Q.; De Sales F.; Li W.
发表日期	2019
ISSN	0930-7575
起始页码	1039
结束页码	1061
卷号	53 期号:2020-01-02
英文摘要	Recent studies have shown that spring land surface temperature (LST) and subsurface temperature (SUBT) over the high elevation areas in the western US (WUS) have significant impacts on the downstream summer droughts/floods in North America. In this paper, both the National Centers for Environmental Prediction—Global Forecast System (NCEP-GFS) general circulation model (GCM) and the weather research and forecasting (WRF) regional climate model (RCM) are employed, where RCM scenarios utilized initial and lateral boundary conditions derived from the corresponding NCEP-GFS scenarios. Here we use a late spring flood in the US Southern Great Plains (SGP) case to examine whether simulation of the LST/SUBT downstream effects is sensitive to the domain size choice, change in dynamical cores within the same model, as well as to the representation of surface processes parameterizations. Although all RCM experiments with different settings simulate reasonably geographical patterns of observed LST and precipitation anomalies, we found that the choice of the domain size is crucial for proper downscaling the LST/SUBT downstream effects to accurately produce the observed precipitation/LST anomalies over the SGP/WUS, respectively, along with the associated large-scale features. The southern boundary location has been identified to be crucial in producing the SGP Low Level Jet strength, which in turn brings more moisture from the Gulf of Mexico to the SGP and thereby resulting in a better simulation of the precipitation anomaly in that area. The sensitivity of the simulation of the LST/SUBT downstream effect to dynamical cores is assessed by inter-comparing the Non-hydrostatic Mesoscale Model (NMM) and the Advanced Research WRF dynamic cores. We find NMM was better at generating the large-scale eastward wave train, a crucial process associated with the LST/SUBT downstream effect. Meanwhile, this study also shows that the LST/SUBT downstream effects were not significantly dependent on the surface process parameterizations, although the Simplified Simple Biosphere model version 3 (SSiB3) highlighted a better performance over SSiB2. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Dynamical cores; Dynamical downscaling; Land surface temperature and subsurface temperature; Regional climate model; Southern Great Plains; US flood
语种	英语
scopus关键词	atmospheric general circulation model; climate modeling; downscaling; flood; land surface; parameterization; regional climate; surface temperature; Atlantic Ocean; Great Plains; Gulf of Mexico; 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/146168
作者单位	Department of Geography, University of California Los Angeles (UCLA), 315 Portola Plaza, 1255 Bunche Hall, Los Angeles, CA 90095-1524, United States; Department of Atmospheric and Oceanic Sciences, UCLA, Los Angeles, CA 90095-1524, United States; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Department of Geography, San Diego State University, San Diego, CA, United States; IMSG and Environmental Modeling Center/National Center for Environmental Prediction (NCEP), NOAA, College Park, MD 20740, United States
推荐引用方式 GB/T 7714	Diallo I.,Xue Y.,Li Q.,et al. Dynamical downscaling the impact of spring Western US land surface temperature on the 2015 flood extremes at the Southern Great Plains: effect of domain choice; dynamic cores and land surface parameterization[J],2019,53(2020-01-02).
APA	Diallo I.,Xue Y.,Li Q.,De Sales F.,&Li W..(2019).Dynamical downscaling the impact of spring Western US land surface temperature on the 2015 flood extremes at the Southern Great Plains: effect of domain choice; dynamic cores and land surface parameterization.Climate Dynamics,53(2020-01-02).
MLA	Diallo I.,et al."Dynamical downscaling the impact of spring Western US land surface temperature on the 2015 flood extremes at the Southern Great Plains: effect of domain choice; dynamic cores and land surface parameterization".Climate Dynamics 53.2020-01-02(2019).