A new albedo parameterization for use in climate models over the Antarctic ice sheet
A parameterization for broadband snow surface albedo, based on snow grain size evolution, cloud optical thickness, and solar zenith angle, is implemented into a regional climate model for Antarctica and validated against field observations of albedo for the period 1995–2004. Over the Antarctic conti...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/231415 2023-11-12T04:05:45+01:00 A new albedo parameterization for use in climate models over the Antarctic ice sheet Kuipers Munneke, P. van den Broeke, M.R. Lenaerts, J.T.M. Flanner, M.G. Gardner, A.S. van de Berg, W.J. Marine and Atmospheric Research Sub Dynamics Meteorology 2011 image/pdf https://dspace.library.uu.nl/handle/1874/231415 en eng 2169-897X https://dspace.library.uu.nl/handle/1874/231415 info:eu-repo/semantics/OpenAccess Article 2011 ftunivutrecht 2023-11-01T23:12:01Z A parameterization for broadband snow surface albedo, based on snow grain size evolution, cloud optical thickness, and solar zenith angle, is implemented into a regional climate model for Antarctica and validated against field observations of albedo for the period 1995–2004. Over the Antarctic continent, modeled snow grain size exhibits expected behavior. The agreement between modeled and observed albedo at Neumayer, Dronning Maud Land, is very good, and subtle variability in albedo is well captured by the model. December–February mean differences in modeled and observed net shortwave radiation range from −8.7 to +3.8 W m−2 between 1995 and 2004, with a mean value of −2.7 W m−2. This is a considerable improvement compared to the previous albedo parameterization in the model, which led to overestimates of the net shortwave fluxes by +15.0 to +22.7 W m−2, or 40–55% of the observed net shortwave flux, in the same period. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet Utrecht University Repository Antarctic Dronning Maud Land Neumayer The Antarctic |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
description |
A parameterization for broadband snow surface albedo, based on snow grain size evolution, cloud optical thickness, and solar zenith angle, is implemented into a regional climate model for Antarctica and validated against field observations of albedo for the period 1995–2004. Over the Antarctic continent, modeled snow grain size exhibits expected behavior. The agreement between modeled and observed albedo at Neumayer, Dronning Maud Land, is very good, and subtle variability in albedo is well captured by the model. December–February mean differences in modeled and observed net shortwave radiation range from −8.7 to +3.8 W m−2 between 1995 and 2004, with a mean value of −2.7 W m−2. This is a considerable improvement compared to the previous albedo parameterization in the model, which led to overestimates of the net shortwave fluxes by +15.0 to +22.7 W m−2, or 40–55% of the observed net shortwave flux, in the same period. |
author2 |
Marine and Atmospheric Research Sub Dynamics Meteorology |
format |
Article in Journal/Newspaper |
author |
Kuipers Munneke, P. van den Broeke, M.R. Lenaerts, J.T.M. Flanner, M.G. Gardner, A.S. van de Berg, W.J. |
spellingShingle |
Kuipers Munneke, P. van den Broeke, M.R. Lenaerts, J.T.M. Flanner, M.G. Gardner, A.S. van de Berg, W.J. A new albedo parameterization for use in climate models over the Antarctic ice sheet |
author_facet |
Kuipers Munneke, P. van den Broeke, M.R. Lenaerts, J.T.M. Flanner, M.G. Gardner, A.S. van de Berg, W.J. |
author_sort |
Kuipers Munneke, P. |
title |
A new albedo parameterization for use in climate models over the Antarctic ice sheet |
title_short |
A new albedo parameterization for use in climate models over the Antarctic ice sheet |
title_full |
A new albedo parameterization for use in climate models over the Antarctic ice sheet |
title_fullStr |
A new albedo parameterization for use in climate models over the Antarctic ice sheet |
title_full_unstemmed |
A new albedo parameterization for use in climate models over the Antarctic ice sheet |
title_sort |
new albedo parameterization for use in climate models over the antarctic ice sheet |
publishDate |
2011 |
url |
https://dspace.library.uu.nl/handle/1874/231415 |
geographic |
Antarctic Dronning Maud Land Neumayer The Antarctic |
geographic_facet |
Antarctic Dronning Maud Land Neumayer The Antarctic |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet |
op_relation |
2169-897X https://dspace.library.uu.nl/handle/1874/231415 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782342086674087936 |