Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet
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 abou...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00050914 2023-05-15T15:09:55+02:00 Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet Delhasse, Alison Kittel, Christoph Amory, Charles Hofer, Stefan van As, Dirk S. Fausto, Robert Fettweis, Xavier 2020-03 electronic https://doi.org/10.5194/tc-14-957-2020 https://noa.gwlb.de/receive/cop_mods_00050914 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050571/tc-14-957-2020.pdf https://tc.copernicus.org/articles/14/957/2020/tc-14-957-2020.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-14-957-2020 https://noa.gwlb.de/receive/cop_mods_00050914 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050571/tc-14-957-2020.pdf https://tc.copernicus.org/articles/14/957/2020/tc-14-957-2020.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2020 ftnonlinearchiv https://doi.org/10.5194/tc-14-957-2020 2022-02-08T22:36:40Z 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. Article in Journal/Newspaper Arctic Greenland Ice Sheet The Cryosphere Niedersächsisches Online-Archiv NOA Arctic Greenland The Cryosphere 14 3 957 965 |
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Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung 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 |
article Verlagsveröffentlichung |
description |
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. |
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 Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-957-2020 https://noa.gwlb.de/receive/cop_mods_00050914 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050571/tc-14-957-2020.pdf https://tc.copernicus.org/articles/14/957/2020/tc-14-957-2020.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Ice Sheet The Cryosphere |
genre_facet |
Arctic Greenland Ice Sheet The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-14-957-2020 https://noa.gwlb.de/receive/cop_mods_00050914 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00050571/tc-14-957-2020.pdf https://tc.copernicus.org/articles/14/957/2020/tc-14-957-2020.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
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_ |
1766341019862827008 |