气候变化领域集成服务门户(CCPortal): Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance

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DOI	10.5194/tc-13-1547-2019
	Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance
	Van Kampenhout L.; Rhoades A.M.; Herrington A.R.; Zarzycki C.M.; Lenaerts J.T.M.; Sacks W.J.; Van Den Broeke M.R.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	1547
结束页码	1564
卷号	13 期号:6
英文摘要	In this study, the resolution dependence of the simulated Greenland ice sheet surface mass balance (GrIS SMB) in the variable-resolution Community Earth System Model (VR-CESM) is investigated. Coupled atmosphere-land simulations are performed on two regionally refined grids over Greenland at 0.5° (∼55km) and 0.25° (∼28km), maintaining a quasi-uniform resolution of 1° (∼111km) over the rest of the globe. On the refined grids, the SMB in the accumulation zone is significantly improved compared to airborne radar and in situ observations, with a general wetting (more snowfall) at the margins and a drying (less snowfall) in the interior GrIS. Total GrIS precipitation decreases with resolution, which is in line with best-available regional climate model results. In the ablation zone, CESM starts developing a positive SMB bias with increased resolution in some basins, notably in the east and the north. The mismatch in ablation is linked to changes in cloud cover in VR-CESM, and a reduced effectiveness of the elevation classes subgrid parametrization in CESM. Overall, our pilot study introduces VR-CESM as a new tool in the cryospheric sciences, which could be used to dynamically downscale SMB in scenario simulations and to force dynamical ice sheet models through the CESM coupling framework. © Author(s) 2019.
学科领域	ablation; airborne survey; climate effect; climate modeling; cloud cover; ice sheet; land-atmosphere interaction; mass balance; radar; regional climate; resolution; simulation; Arctic; Greenland
语种	英语
scopus关键词	ablation; airborne survey; climate effect; climate modeling; cloud cover; ice sheet; land-atmosphere interaction; mass balance; radar; regional climate; resolution; simulation; Arctic; Greenland
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118879
作者单位	Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, Netherlands; Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Stony Brook University, Stony Brook, NY, United States; National Center for Atmospheric Research, Boulder, Boulder, CO, United States; Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, United States
推荐引用方式 GB/T 7714	Van Kampenhout L.,Rhoades A.M.,Herrington A.R.,et al. Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance[J],2019,13(6).
APA	Van Kampenhout L..,Rhoades A.M..,Herrington A.R..,Zarzycki C.M..,Lenaerts J.T.M..,...&Van Den Broeke M.R..(2019).Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance.The Cryosphere,13(6).
MLA	Van Kampenhout L.,et al."Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance".The Cryosphere 13.6(2019).