气候变化领域集成服务门户(CCPortal): Influences of North Pacific Ocean Domain Extent on the Western U.S. Winter Hydroclimatology in Variable-Resolution CESM

CCPortal

DOI	10.1029/2019JD031977
	Influences of North Pacific Ocean Domain Extent on the Western U.S. Winter Hydroclimatology in Variable-Resolution CESM
	Rhoades A.M.; Jones A.D.; O'Brien T.A.; O'Brien J.P.; Ullrich P.A.; Zarzycki C.M.
发表日期	2020
ISSN	2169897X
卷号	125 期号:14
英文摘要	Variable-resolution global climate models (VRGCMs) are a dynamical downscaling method that can reach spatiotemporal scales needed for regional climate assessments. Over the years, several users of VRGCMs have assumed where the location and extent of the refinement domain should be based on knowledge of the prevailing storm tracks and resolution dependence of important regional climate processes (e.g., atmospheric rivers [ARs] and orographic uplift), but the effect of high-resolution domain size and extent on the simulation of downstream hydroclimatic phenomena has not been systematically evaluated. Here, we use variable resolution in the Community Earth System Model (VR-CESM) to perform such a test. To do this, three VR-CESM grids were generated that span the entire, two thirds, and one third of the North Pacific and evaluated for a 30-year climatology using Atmospheric Model Intercomparison Project protocols. Simulations are compared with reanalysis products offshore (fifth-generation of the European Centre for Medium-Range Weather Forecasts atmospheric reanalysis [ERA5]) and onshore (Livneh, 2015, https://doi.org/10.1038/sdata.2015.42, and Parameter-elevation Regressions on Independent Slopes Model [PRISM]) of the western United States. The westward expansion of refinement domain influenced integrated vapor transport (IVT), which was generally high biased but minimally impacted AR characteristics. Due to slight differences in landfalling AR counts in the western United States, California winter precipitation generally improved with westward expansion of the refinement domain. Western U.S. mountain snowpack and surface temperatures were insensitive to refinement domain size and were more influenced by changes in topographic resolution and/or land surface model version. Given minimal dependence of simulated western U.S. hydroclimate on refinement domain size over the North Pacific, we advise future VR-CESM studies to focus grid resolution on better resolving land surface heterogeneity. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric rivers; Community Earth System Model; hydroclimatology; regional downscaling; TempestExtremes; variable-resolution global climate models
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185904
作者单位	Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Earth and Atmospheric Sciences Department, Indiana University Bloomington, Bloomington, IN, United States; Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO, United States; Department of Land, Air, and Water Resources, University of California, Davis, CA, United States; Department of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, United States
推荐引用方式 GB/T 7714	Rhoades A.M.,Jones A.D.,O'Brien T.A.,et al. Influences of North Pacific Ocean Domain Extent on the Western U.S. Winter Hydroclimatology in Variable-Resolution CESM[J],2020,125(14).
APA	Rhoades A.M.,Jones A.D.,O'Brien T.A.,O'Brien J.P.,Ullrich P.A.,&Zarzycki C.M..(2020).Influences of North Pacific Ocean Domain Extent on the Western U.S. Winter Hydroclimatology in Variable-Resolution CESM.Journal of Geophysical Research: Atmospheres,125(14).
MLA	Rhoades A.M.,et al."Influences of North Pacific Ocean Domain Extent on the Western U.S. Winter Hydroclimatology in Variable-Resolution CESM".Journal of Geophysical Research: Atmospheres 125.14(2020).