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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ftdoajarticles:oai:doaj.org/article:bcc573040f944d7199fe6acd0871b5d0 2023-05-15T15:09:57+02:00 Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet A. Delhasse C. Kittel C. Amory S. Hofer D. van As R. S. Fausto X. Fettweis 2020-03-01T00:00:00Z https://doi.org/10.5194/tc-14-957-2020 https://doaj.org/article/bcc573040f944d7199fe6acd0871b5d0 EN eng Copernicus Publications https://www.the-cryosphere.net/14/957/2020/tc-14-957-2020.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-14-957-2020 1994-0416 1994-0424 https://doaj.org/article/bcc573040f944d7199fe6acd0871b5d0 The Cryosphere, Vol 14, Pp 957-965 (2020) Environmental sciences GE1-350 Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.5194/tc-14-957-2020 2022-12-31T01:44:03Z 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 Directory of Open Access Journals: DOAJ Articles Arctic Greenland The Cryosphere 14 3 957 965 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 A. Delhasse C. Kittel C. Amory S. Hofer D. van As R. S. Fausto X. Fettweis Brief communication: Evaluation of the near-surface climate in ERA5 over the Greenland Ice Sheet |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 |
A. Delhasse C. Kittel C. Amory S. Hofer D. van As R. S. Fausto X. Fettweis |
author_facet |
A. Delhasse C. Kittel C. Amory S. Hofer D. van As R. S. Fausto X. Fettweis |
author_sort |
A. Delhasse |
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://doaj.org/article/bcc573040f944d7199fe6acd0871b5d0 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Ice Sheet The Cryosphere |
genre_facet |
Arctic Greenland Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 14, Pp 957-965 (2020) |
op_relation |
https://www.the-cryosphere.net/14/957/2020/tc-14-957-2020.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-14-957-2020 1994-0416 1994-0424 https://doaj.org/article/bcc573040f944d7199fe6acd0871b5d0 |
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 |
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1766341033651601408 |