Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet
peer reviewed 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...
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Copernicus Group
2020
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Online Access: | https://orbi.uliege.be/handle/2268/245980 https://orbi.uliege.be/bitstream/2268/245980/1/tc-14-957-2020.pdf https://doi.org/10.5194/tc-14-957-2020 |
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ftorbi:oai:orbi.ulg.ac.be:2268/245980 2024-10-13T14:05:38+00:00 Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet Evaluation du climat de proche surface des ERA5 sur l'inlandsis du Groenland Delhasse, Alison Kittel, Christoph Amory, Charles Hofer, Stefan van As, Dirk S. Fausto, Robert Fettweis, Xavier 2020-03-12 https://orbi.uliege.be/handle/2268/245980 https://orbi.uliege.be/bitstream/2268/245980/1/tc-14-957-2020.pdf https://doi.org/10.5194/tc-14-957-2020 en eng Copernicus Group https://www.the-cryosphere.net/14/957/2020/ urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/245980 info:hdl:2268/245980 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess The Cryosphere, 14, 957–965 (2020-03-12) Greenland Reanalyses Climate Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2020 ftorbi https://doi.org/10.5194/tc-14-957-2020 2024-09-30T14:23:32Z peer reviewed 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 ERAInterim, 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. Article in Journal/Newspaper Arctic Greenland Groenland Ice Sheet The Cryosphere University of Liège: ORBi (Open Repository and Bibliography) Arctic Greenland The Cryosphere 14 3 957 965 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Greenland Reanalyses Climate Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Greenland Reanalyses Climate Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Delhasse, Alison Kittel, Christoph Amory, Charles Hofer, Stefan van As, Dirk S. Fausto, Robert Fettweis, Xavier Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet |
topic_facet |
Greenland Reanalyses Climate Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed 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 ERAInterim, 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. |
format |
Article in Journal/Newspaper |
author |
Delhasse, Alison Kittel, Christoph Amory, Charles Hofer, Stefan van As, Dirk S. Fausto, Robert Fettweis, Xavier |
author_facet |
Delhasse, Alison Kittel, Christoph Amory, Charles Hofer, Stefan van As, Dirk S. Fausto, Robert Fettweis, Xavier |
author_sort |
Delhasse, Alison |
title |
Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet |
title_short |
Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet |
title_full |
Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet |
title_fullStr |
Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet |
title_full_unstemmed |
Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet |
title_sort |
brief communication: evaluation of the near-surface climate in era5 over the greenland ice sheet |
publisher |
Copernicus Group |
publishDate |
2020 |
url |
https://orbi.uliege.be/handle/2268/245980 https://orbi.uliege.be/bitstream/2268/245980/1/tc-14-957-2020.pdf https://doi.org/10.5194/tc-14-957-2020 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Groenland Ice Sheet The Cryosphere |
genre_facet |
Arctic Greenland Groenland Ice Sheet The Cryosphere |
op_source |
The Cryosphere, 14, 957–965 (2020-03-12) |
op_relation |
https://www.the-cryosphere.net/14/957/2020/ urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/245980 info:hdl:2268/245980 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-14-957-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
3 |
container_start_page |
957 |
op_container_end_page |
965 |
_version_ |
1812811703330537472 |