Brief communication: Surface energy balance differences over Greenland between ERA5 and ERA-Interim
We compare the main atmospheric drivers of the melt season over the Greenland Ice Sheet (GrIS) in ERA5 and ERA-Interim (ERAI) in their overlapping period 1979–2018. In summer, ERA5 differs significantly from ERAI, especially in the melt regions. Small-scale ERA5 − ERAI differences near the ice sheet...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-17-5131-2023 https://doaj.org/article/d72f79ea6b6f4813bf070970bf80aaad |
id |
ftdoajarticles:oai:doaj.org/article:d72f79ea6b6f4813bf070970bf80aaad |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:d72f79ea6b6f4813bf070970bf80aaad 2024-01-07T09:43:34+01:00 Brief communication: Surface energy balance differences over Greenland between ERA5 and ERA-Interim U. Krebs-Kanzow C. B. Rodehacke G. Lohmann 2023-12-01T00:00:00Z https://doi.org/10.5194/tc-17-5131-2023 https://doaj.org/article/d72f79ea6b6f4813bf070970bf80aaad EN eng Copernicus Publications https://tc.copernicus.org/articles/17/5131/2023/tc-17-5131-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-5131-2023 1994-0416 1994-0424 https://doaj.org/article/d72f79ea6b6f4813bf070970bf80aaad The Cryosphere, Vol 17, Pp 5131-5136 (2023) Environmental sciences GE1-350 Geology QE1-996.5 article 2023 ftdoajarticles https://doi.org/10.5194/tc-17-5131-2023 2023-12-10T01:40:30Z We compare the main atmospheric drivers of the melt season over the Greenland Ice Sheet (GrIS) in ERA5 and ERA-Interim (ERAI) in their overlapping period 1979–2018. In summer, ERA5 differs significantly from ERAI, especially in the melt regions. Small-scale ERA5 − ERAI differences near the ice sheet's margins and over steep slopes can be explained by the different resolution, while the large-scale differences indicate a different representation of physical processes in the two reanalyses: averaged over the lower parts of the GrIS, the mean near-surface air temperature is 1 K lower, while the mean downward shortwave radiation at the surface is on average 15 W m −2 higher than in ERAI. Comparison with observational weather station data shows a significant warm bias in ERAI and, for ERA5, a significant positive bias in downward shortwave radiation. Consequently, methods that previously estimated the GrIS surface mass balance from the ERAI surface energy balance need to be carefully recalibrated before converting to ERA5 forcing. Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Directory of Open Access Journals: DOAJ Articles Greenland The Cryosphere 17 12 5131 5136 |
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 U. Krebs-Kanzow C. B. Rodehacke G. Lohmann Brief communication: Surface energy balance differences over Greenland between ERA5 and ERA-Interim |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
We compare the main atmospheric drivers of the melt season over the Greenland Ice Sheet (GrIS) in ERA5 and ERA-Interim (ERAI) in their overlapping period 1979–2018. In summer, ERA5 differs significantly from ERAI, especially in the melt regions. Small-scale ERA5 − ERAI differences near the ice sheet's margins and over steep slopes can be explained by the different resolution, while the large-scale differences indicate a different representation of physical processes in the two reanalyses: averaged over the lower parts of the GrIS, the mean near-surface air temperature is 1 K lower, while the mean downward shortwave radiation at the surface is on average 15 W m −2 higher than in ERAI. Comparison with observational weather station data shows a significant warm bias in ERAI and, for ERA5, a significant positive bias in downward shortwave radiation. Consequently, methods that previously estimated the GrIS surface mass balance from the ERAI surface energy balance need to be carefully recalibrated before converting to ERA5 forcing. |
format |
Article in Journal/Newspaper |
author |
U. Krebs-Kanzow C. B. Rodehacke G. Lohmann |
author_facet |
U. Krebs-Kanzow C. B. Rodehacke G. Lohmann |
author_sort |
U. Krebs-Kanzow |
title |
Brief communication: Surface energy balance differences over Greenland between ERA5 and ERA-Interim |
title_short |
Brief communication: Surface energy balance differences over Greenland between ERA5 and ERA-Interim |
title_full |
Brief communication: Surface energy balance differences over Greenland between ERA5 and ERA-Interim |
title_fullStr |
Brief communication: Surface energy balance differences over Greenland between ERA5 and ERA-Interim |
title_full_unstemmed |
Brief communication: Surface energy balance differences over Greenland between ERA5 and ERA-Interim |
title_sort |
brief communication: surface energy balance differences over greenland between era5 and era-interim |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-5131-2023 https://doaj.org/article/d72f79ea6b6f4813bf070970bf80aaad |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 17, Pp 5131-5136 (2023) |
op_relation |
https://tc.copernicus.org/articles/17/5131/2023/tc-17-5131-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-5131-2023 1994-0416 1994-0424 https://doaj.org/article/d72f79ea6b6f4813bf070970bf80aaad |
op_doi |
https://doi.org/10.5194/tc-17-5131-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
12 |
container_start_page |
5131 |
op_container_end_page |
5136 |
_version_ |
1787424844771491840 |