Modeling the snow cover in climate studies - 1. Long-term integrations under different climatic conditions using a multilayered snow-cover model
A physically based model of a snow cover, which has been designed for climate studies, was tested under different conditions (Arctic, midlatitudes, alpine regions). This multi layered model can be used for stand-alone experiments as well as for implementation into sophisticated coupled models. One v...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | http://hdl.handle.net/21.11116/0000-000C-3BB9-2 http://hdl.handle.net/21.11116/0000-000C-3BBB-0 |
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ftpubman:oai:pure.mpg.de:item_3484641 2023-08-27T04:03:39+02:00 Modeling the snow cover in climate studies - 1. Long-term integrations under different climatic conditions using a multilayered snow-cover model Loth , B. Graf, H. 1998 application/pdf http://hdl.handle.net/21.11116/0000-000C-3BB9-2 http://hdl.handle.net/21.11116/0000-000C-3BBB-0 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1029/97JD01411 http://hdl.handle.net/21.11116/0000-000C-3BB9-2 http://hdl.handle.net/21.11116/0000-000C-3BBB-0 info:eu-repo/semantics/openAccess Journal of Geophysical Research: Atmospheres info:eu-repo/semantics/article 1998 ftpubman https://doi.org/10.1029/97JD01411 2023-08-02T01:36:31Z A physically based model of a snow cover, which has been designed for climate studies, was tested under different conditions (Arctic, midlatitudes, alpine regions). This multi layered model can be used for stand-alone experiments as well as for implementation into sophisticated coupled models. One version of the model, which considers a partial snow coverage of the gr id cells and an albedo masking effect by vegetation, is formulated for the Hamburg climate model ECHAM [Roeckner et al., 1992]. The key parameters of the snow-cover model are snow albedo, description of liquid water (storage capacity, transmission rate), turbulent fluxes at the snow surface, hear; conduction (internal heat conduction and heat exchange with ground), new snow density and density changes due to aging, and the choice of snow layers. Wind drifting processes and an additional form of metamorphism, the wind compaction, have to be considered in areas with high wind speeds. In order to obtain the simulation quality which is necessary for climate studies when using observed forcing data, the precipitation measurements should be corrected and information concerning the precipitation type should be given in the input data sets. A further improvement of the model could be reached by the implementation of a more sophisticated transmission scheme for liquid water, the use of a wind dependent new snow density, and the modification of snow albedo due to different rates of pollution. Article in Journal/Newspaper albedo Arctic Max Planck Society: MPG.PuRe Arctic Journal of Geophysical Research: Atmospheres 103 D10 11313 11327 |
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Open Polar |
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Max Planck Society: MPG.PuRe |
op_collection_id |
ftpubman |
language |
English |
description |
A physically based model of a snow cover, which has been designed for climate studies, was tested under different conditions (Arctic, midlatitudes, alpine regions). This multi layered model can be used for stand-alone experiments as well as for implementation into sophisticated coupled models. One version of the model, which considers a partial snow coverage of the gr id cells and an albedo masking effect by vegetation, is formulated for the Hamburg climate model ECHAM [Roeckner et al., 1992]. The key parameters of the snow-cover model are snow albedo, description of liquid water (storage capacity, transmission rate), turbulent fluxes at the snow surface, hear; conduction (internal heat conduction and heat exchange with ground), new snow density and density changes due to aging, and the choice of snow layers. Wind drifting processes and an additional form of metamorphism, the wind compaction, have to be considered in areas with high wind speeds. In order to obtain the simulation quality which is necessary for climate studies when using observed forcing data, the precipitation measurements should be corrected and information concerning the precipitation type should be given in the input data sets. A further improvement of the model could be reached by the implementation of a more sophisticated transmission scheme for liquid water, the use of a wind dependent new snow density, and the modification of snow albedo due to different rates of pollution. |
format |
Article in Journal/Newspaper |
author |
Loth , B. Graf, H. |
spellingShingle |
Loth , B. Graf, H. Modeling the snow cover in climate studies - 1. Long-term integrations under different climatic conditions using a multilayered snow-cover model |
author_facet |
Loth , B. Graf, H. |
author_sort |
Loth , B. |
title |
Modeling the snow cover in climate studies - 1. Long-term integrations under different climatic conditions using a multilayered snow-cover model |
title_short |
Modeling the snow cover in climate studies - 1. Long-term integrations under different climatic conditions using a multilayered snow-cover model |
title_full |
Modeling the snow cover in climate studies - 1. Long-term integrations under different climatic conditions using a multilayered snow-cover model |
title_fullStr |
Modeling the snow cover in climate studies - 1. Long-term integrations under different climatic conditions using a multilayered snow-cover model |
title_full_unstemmed |
Modeling the snow cover in climate studies - 1. Long-term integrations under different climatic conditions using a multilayered snow-cover model |
title_sort |
modeling the snow cover in climate studies - 1. long-term integrations under different climatic conditions using a multilayered snow-cover model |
publishDate |
1998 |
url |
http://hdl.handle.net/21.11116/0000-000C-3BB9-2 http://hdl.handle.net/21.11116/0000-000C-3BBB-0 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic |
genre_facet |
albedo Arctic |
op_source |
Journal of Geophysical Research: Atmospheres |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/97JD01411 http://hdl.handle.net/21.11116/0000-000C-3BB9-2 http://hdl.handle.net/21.11116/0000-000C-3BBB-0 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/97JD01411 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
103 |
container_issue |
D10 |
container_start_page |
11313 |
op_container_end_page |
11327 |
_version_ |
1775357053941841920 |