Evaluation of a new snow albedo scheme for the Greenland ice sheet in the Regional Atmospheric Climate Model (RACMO2)
Snow and ice albedo schemes in present-day climate models often lack a sophisticated radiation penetration scheme and do not explicitly include spectral albedo variations. In this study, we evaluate a new snow albedo scheme in the Regional Atmospheric Climate Model (RACMO2) for the Greenland ice she...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2020
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-14-3645-2020 https://tc.copernicus.org/articles/14/3645/2020/tc-14-3645-2020.pdf https://doaj.org/article/1ad69614e75d402e87ebfb0ab7784c43 |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:1ad69614e75d402e87ebfb0ab7784c43 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:1ad69614e75d402e87ebfb0ab7784c43 2023-05-15T16:27:09+02:00 Evaluation of a new snow albedo scheme for the Greenland ice sheet in the Regional Atmospheric Climate Model (RACMO2) C. T. van Dalum W. J. van de Berg S. Lhermitte M. R. van den Broeke 2020-11-01 https://doi.org/10.5194/tc-14-3645-2020 https://tc.copernicus.org/articles/14/3645/2020/tc-14-3645-2020.pdf https://doaj.org/article/1ad69614e75d402e87ebfb0ab7784c43 en eng Copernicus Publications doi:10.5194/tc-14-3645-2020 1994-0416 1994-0424 https://tc.copernicus.org/articles/14/3645/2020/tc-14-3645-2020.pdf https://doaj.org/article/1ad69614e75d402e87ebfb0ab7784c43 undefined The Cryosphere, Vol 14, Pp 3645-3662 (2020) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.5194/tc-14-3645-2020 2023-01-22T19:30:42Z Snow and ice albedo schemes in present-day climate models often lack a sophisticated radiation penetration scheme and do not explicitly include spectral albedo variations. In this study, we evaluate a new snow albedo scheme in the Regional Atmospheric Climate Model (RACMO2) for the Greenland ice sheet, version 2.3p3, that includes these processes. The new albedo scheme uses the Two-streAm Radiative TransfEr in Snow (TARTES) model and the Spectral-to-NarrOWBand ALbedo (SNOWBAL) module, version 1.2. Additionally, the bare-ice albedo parameterization has been updated. The snow and ice broadband and narrowband albedo output of the updated version of RACMO2 is evaluated using the Programme for Monitoring of the Greenland Ice Sheet (PROMICE) and Kangerlussuaq transect (K-transect) in situ data and Moderate Resolution Imaging Spectroradiometer (MODIS) remote-sensing observations. Generally, the modeled narrowband and broadband albedo is in very good agreement with satellite observations, leading to a negligible domain-averaged broadband albedo bias for the interior. Some discrepancies are, however, observed close to the ice margin. Compared to the previous model version, RACMO2.3p2, the broadband albedo is considerably higher in the bare-ice zone during the ablation season, as atmospheric conditions now alter the bare-ice broadband albedo. For most other regions, however, the updated broadband albedo is lower due to spectral effects, radiation penetration or enhanced snow metamorphism. Article in Journal/Newspaper Greenland Ice Sheet Kangerlussuaq The Cryosphere Unknown Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) The Cryosphere 14 11 3645 3662 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir C. T. van Dalum W. J. van de Berg S. Lhermitte M. R. van den Broeke Evaluation of a new snow albedo scheme for the Greenland ice sheet in the Regional Atmospheric Climate Model (RACMO2) |
topic_facet |
geo envir |
description |
Snow and ice albedo schemes in present-day climate models often lack a sophisticated radiation penetration scheme and do not explicitly include spectral albedo variations. In this study, we evaluate a new snow albedo scheme in the Regional Atmospheric Climate Model (RACMO2) for the Greenland ice sheet, version 2.3p3, that includes these processes. The new albedo scheme uses the Two-streAm Radiative TransfEr in Snow (TARTES) model and the Spectral-to-NarrOWBand ALbedo (SNOWBAL) module, version 1.2. Additionally, the bare-ice albedo parameterization has been updated. The snow and ice broadband and narrowband albedo output of the updated version of RACMO2 is evaluated using the Programme for Monitoring of the Greenland Ice Sheet (PROMICE) and Kangerlussuaq transect (K-transect) in situ data and Moderate Resolution Imaging Spectroradiometer (MODIS) remote-sensing observations. Generally, the modeled narrowband and broadband albedo is in very good agreement with satellite observations, leading to a negligible domain-averaged broadband albedo bias for the interior. Some discrepancies are, however, observed close to the ice margin. Compared to the previous model version, RACMO2.3p2, the broadband albedo is considerably higher in the bare-ice zone during the ablation season, as atmospheric conditions now alter the bare-ice broadband albedo. For most other regions, however, the updated broadband albedo is lower due to spectral effects, radiation penetration or enhanced snow metamorphism. |
format |
Article in Journal/Newspaper |
author |
C. T. van Dalum W. J. van de Berg S. Lhermitte M. R. van den Broeke |
author_facet |
C. T. van Dalum W. J. van de Berg S. Lhermitte M. R. van den Broeke |
author_sort |
C. T. van Dalum |
title |
Evaluation of a new snow albedo scheme for the Greenland ice sheet in the Regional Atmospheric Climate Model (RACMO2) |
title_short |
Evaluation of a new snow albedo scheme for the Greenland ice sheet in the Regional Atmospheric Climate Model (RACMO2) |
title_full |
Evaluation of a new snow albedo scheme for the Greenland ice sheet in the Regional Atmospheric Climate Model (RACMO2) |
title_fullStr |
Evaluation of a new snow albedo scheme for the Greenland ice sheet in the Regional Atmospheric Climate Model (RACMO2) |
title_full_unstemmed |
Evaluation of a new snow albedo scheme for the Greenland ice sheet in the Regional Atmospheric Climate Model (RACMO2) |
title_sort |
evaluation of a new snow albedo scheme for the greenland ice sheet in the regional atmospheric climate model (racmo2) |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-3645-2020 https://tc.copernicus.org/articles/14/3645/2020/tc-14-3645-2020.pdf https://doaj.org/article/1ad69614e75d402e87ebfb0ab7784c43 |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Greenland Kangerlussuaq |
geographic_facet |
Greenland Kangerlussuaq |
genre |
Greenland Ice Sheet Kangerlussuaq The Cryosphere |
genre_facet |
Greenland Ice Sheet Kangerlussuaq The Cryosphere |
op_source |
The Cryosphere, Vol 14, Pp 3645-3662 (2020) |
op_relation |
doi:10.5194/tc-14-3645-2020 1994-0416 1994-0424 https://tc.copernicus.org/articles/14/3645/2020/tc-14-3645-2020.pdf https://doaj.org/article/1ad69614e75d402e87ebfb0ab7784c43 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-14-3645-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
11 |
container_start_page |
3645 |
op_container_end_page |
3662 |
_version_ |
1766016244673150976 |