DOI: 10.5194/tc-14-957-2020
论文题名: Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet
作者: Delhasse A. ; Kittel C. ; Amory C. ; Hofer S. ; Van As D. ; Fausto R.S. ; Fettweis X.
刊名: Cryosphere
ISSN: 19940416
出版年: 2020
卷: 14, 期: 3 起始页码: 957
结束页码: 965
语种: 英语
英文关键词: climate modeling
; homogeneity
; melting
; radiative transfer
; regional climate
; satellite data
; snow cover
; surface temperature
; weather forecasting
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: The ERA5 reanalysis, recently made available by the European Centre for Medium-Range Weather Forecasts (ECMWF), is a new reanalysis product at a high resolution replacing ERA-Interim and is considered to provide the best climate reanalysis over Greenland to date. However, so far little is known about the performance of ERA5 over the Greenland Ice Sheet (GrIS). In this study, we compare the near-surface climate from the new ERA5 reanalysis to ERA-Interim, the Arctic System Reanalysis (ASR) as well as to a state-of-the-art polar regional climate model (MAR). The results show (1) that ERA5 does not outperform ERA-Interim significantly when compared with near-surface climate observations over GrIS, but ASR better models the near-surface temperature than both ERA reanalyses. (2) Polar regional climate models (e.g., MAR) are still a useful tool to downscale the GrIS climate compared to ERA5, as in particular the near-surface temperature in summer has a key role for representing snow and ice processes such as the surface melt. However, assimilating satellite data and using a more recent radiative scheme enable both ERA and ASR reanalyses to represent more satisfactorily than MAR the downward solar and infrared fluxes. (3) MAR near-surface climate is not affected when forced at its lateral boundaries by either ERA5 or ERA-Interim. Therefore, forcing polar regional climate models with ERA5 starting from 1950 will enable long and homogeneous surface mass balance reconstructions. © 2020 Museum National d'Histoire Naturelle. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164441
Appears in Collections: 气候变化与战略
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作者单位: Laboratory of Climatology, Department of Geography, SPHERES, University of Liège, Liège, Belgium; School of Geographical Sciences, University of Bristol, Bristol, United Kingdom; Geological Survey of Denmark and Greenland (GEUS), Copenhagen, 1350, Denmark
Recommended Citation:
Delhasse A.,Kittel C.,Amory C.,et al. Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet[J]. Cryosphere,2020-01-01,14(3)