On the importance to consider the cloud dependence in parameterizing the albedo of snow on sea ice
The impact of a revised snow surface albedo parameterization, which explicitly considers the cloud dependence of the snow albedo, is evaluated in simulations of a coupled regional climate model of the Arctic. The revised snow surface albedo parameterization leads to a more realistic simulation of th...
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ftcopernicus:oai:publications.copernicus.org:egusphere110610 2023-06-06T11:42:46+02:00 On the importance to consider the cloud dependence in parameterizing the albedo of snow on sea ice Foth, Lara Dorn, Wolfgang Rinke, Annette Jäkel, Evelyn Niehaus, Hannah 2023-04-11 application/pdf https://doi.org/10.5194/egusphere-2023-634 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-634/ eng eng doi:10.5194/egusphere-2023-634 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-634/ eISSN: Text 2023 ftcopernicus https://doi.org/10.5194/egusphere-2023-634 2023-04-17T16:23:12Z The impact of a revised snow surface albedo parameterization, which explicitly considers the cloud dependence of the snow albedo, is evaluated in simulations of a coupled regional climate model of the Arctic. The revised snow surface albedo parameterization leads to a more realistic simulation of the variability of the surface albedo during the snow melt period in late May and June. In particular, the reproduction of lower albedo values under cloud-free/broken-cloud conditions during the snow melt period represents a major improvement and results in an earlier disappearance of the snow cover and an earlier onset of sea-ice melt. In this way, the consideration of the cloud dependence of the snow albedo results in an amplification of the two-stage snow-albedo/ice-albedo feedback in the model. This finds expression in additional loss of sea-ice volume of more than 1000 km 3 and additional reduction of summer sea-ice extent of around 250,000 km 2 during one melting period, with accumulating magnitude of the overall changes in subsequent years. Text albedo Arctic Sea ice Copernicus Publications: E-Journals Arctic |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The impact of a revised snow surface albedo parameterization, which explicitly considers the cloud dependence of the snow albedo, is evaluated in simulations of a coupled regional climate model of the Arctic. The revised snow surface albedo parameterization leads to a more realistic simulation of the variability of the surface albedo during the snow melt period in late May and June. In particular, the reproduction of lower albedo values under cloud-free/broken-cloud conditions during the snow melt period represents a major improvement and results in an earlier disappearance of the snow cover and an earlier onset of sea-ice melt. In this way, the consideration of the cloud dependence of the snow albedo results in an amplification of the two-stage snow-albedo/ice-albedo feedback in the model. This finds expression in additional loss of sea-ice volume of more than 1000 km 3 and additional reduction of summer sea-ice extent of around 250,000 km 2 during one melting period, with accumulating magnitude of the overall changes in subsequent years. |
format |
Text |
author |
Foth, Lara Dorn, Wolfgang Rinke, Annette Jäkel, Evelyn Niehaus, Hannah |
spellingShingle |
Foth, Lara Dorn, Wolfgang Rinke, Annette Jäkel, Evelyn Niehaus, Hannah On the importance to consider the cloud dependence in parameterizing the albedo of snow on sea ice |
author_facet |
Foth, Lara Dorn, Wolfgang Rinke, Annette Jäkel, Evelyn Niehaus, Hannah |
author_sort |
Foth, Lara |
title |
On the importance to consider the cloud dependence in parameterizing the albedo of snow on sea ice |
title_short |
On the importance to consider the cloud dependence in parameterizing the albedo of snow on sea ice |
title_full |
On the importance to consider the cloud dependence in parameterizing the albedo of snow on sea ice |
title_fullStr |
On the importance to consider the cloud dependence in parameterizing the albedo of snow on sea ice |
title_full_unstemmed |
On the importance to consider the cloud dependence in parameterizing the albedo of snow on sea ice |
title_sort |
on the importance to consider the cloud dependence in parameterizing the albedo of snow on sea ice |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-634 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-634/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic Sea ice |
genre_facet |
albedo Arctic Sea ice |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2023-634 https://egusphere.copernicus.org/preprints/2023/egusphere-2023-634/ |
op_doi |
https://doi.org/10.5194/egusphere-2023-634 |
_version_ |
1767951518601838592 |