Regional fluxes of momentum and sensible heat over a sub-arctic landscape during late winter
Based on measurements at Sodankyla Meteorological Observatory the regional (aggregated) momentum and sensible heat fluxes are estimated for two days over a site in Finnish Lapland during late winter. The forest covers 49% of the area. The study shows that the forest dominates and controls the region...
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Language: | English |
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2001
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Online Access: | https://orbit.dtu.dk/en/publications/0c21e021-49c9-4140-a543-4dd4b8826243 https://doi.org/10.1023/A:1018982711470 |
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ftdtupubl:oai:pure.atira.dk:publications/0c21e021-49c9-4140-a543-4dd4b8826243 2024-06-09T07:42:26+00:00 Regional fluxes of momentum and sensible heat over a sub-arctic landscape during late winter Batchvarova, E. Gryning, Sven-Erik Hasager, C.B. 2001 https://orbit.dtu.dk/en/publications/0c21e021-49c9-4140-a543-4dd4b8826243 https://doi.org/10.1023/A:1018982711470 eng eng https://orbit.dtu.dk/en/publications/0c21e021-49c9-4140-a543-4dd4b8826243 info:eu-repo/semantics/closedAccess Batchvarova , E , Gryning , S-E & Hasager , C B 2001 , ' Regional fluxes of momentum and sensible heat over a sub-arctic landscape during late winter ' , Boundary-Layer Meteorology , vol. 99 , no. 3 , pp. 489-507 . https://doi.org/10.1023/A:1018982711470 Vindenergi og atmosfæriske processer article 2001 ftdtupubl https://doi.org/10.1023/A:1018982711470 2024-05-14T23:56:42Z Based on measurements at Sodankyla Meteorological Observatory the regional (aggregated) momentum and sensible heat fluxes are estimated for two days over a site in Finnish Lapland during late winter. The forest covers 49% of the area. The study shows that the forest dominates and controls the regional fluxes of momentum and sensible heat in different ways. The regional momentum flux is found to be 10-20% smaller than the measured momentum flux over the forest, and the regional sensible heat flux is estimated to be 30-50% of the values measured over a coniferous forest. The regional momentum flux is determined in two ways, both based on blending height theory. One is a parameterised method, the other represents a numerical solution of an aggregation model. The regional sensible heat flux is determined from the theory of mixed-layer growth. At near neutral conditions the regional momentum flux can be determined independently of the regional sensible heat flux. At unstable conditions the two models become coupled. The information that is needed by the parameterised blending height method and by the mixed-layer evolution method in order to derive the regional fluxes of momentum and sensible heat can be obtained from radiosonde profiles of wind speed and temperature. Article in Journal/Newspaper Arctic Arctic Lapland Technical University of Denmark: DTU Orbit Arctic |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Vindenergi og atmosfæriske processer |
spellingShingle |
Vindenergi og atmosfæriske processer Batchvarova, E. Gryning, Sven-Erik Hasager, C.B. Regional fluxes of momentum and sensible heat over a sub-arctic landscape during late winter |
topic_facet |
Vindenergi og atmosfæriske processer |
description |
Based on measurements at Sodankyla Meteorological Observatory the regional (aggregated) momentum and sensible heat fluxes are estimated for two days over a site in Finnish Lapland during late winter. The forest covers 49% of the area. The study shows that the forest dominates and controls the regional fluxes of momentum and sensible heat in different ways. The regional momentum flux is found to be 10-20% smaller than the measured momentum flux over the forest, and the regional sensible heat flux is estimated to be 30-50% of the values measured over a coniferous forest. The regional momentum flux is determined in two ways, both based on blending height theory. One is a parameterised method, the other represents a numerical solution of an aggregation model. The regional sensible heat flux is determined from the theory of mixed-layer growth. At near neutral conditions the regional momentum flux can be determined independently of the regional sensible heat flux. At unstable conditions the two models become coupled. The information that is needed by the parameterised blending height method and by the mixed-layer evolution method in order to derive the regional fluxes of momentum and sensible heat can be obtained from radiosonde profiles of wind speed and temperature. |
format |
Article in Journal/Newspaper |
author |
Batchvarova, E. Gryning, Sven-Erik Hasager, C.B. |
author_facet |
Batchvarova, E. Gryning, Sven-Erik Hasager, C.B. |
author_sort |
Batchvarova, E. |
title |
Regional fluxes of momentum and sensible heat over a sub-arctic landscape during late winter |
title_short |
Regional fluxes of momentum and sensible heat over a sub-arctic landscape during late winter |
title_full |
Regional fluxes of momentum and sensible heat over a sub-arctic landscape during late winter |
title_fullStr |
Regional fluxes of momentum and sensible heat over a sub-arctic landscape during late winter |
title_full_unstemmed |
Regional fluxes of momentum and sensible heat over a sub-arctic landscape during late winter |
title_sort |
regional fluxes of momentum and sensible heat over a sub-arctic landscape during late winter |
publishDate |
2001 |
url |
https://orbit.dtu.dk/en/publications/0c21e021-49c9-4140-a543-4dd4b8826243 https://doi.org/10.1023/A:1018982711470 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Lapland |
genre_facet |
Arctic Arctic Lapland |
op_source |
Batchvarova , E , Gryning , S-E & Hasager , C B 2001 , ' Regional fluxes of momentum and sensible heat over a sub-arctic landscape during late winter ' , Boundary-Layer Meteorology , vol. 99 , no. 3 , pp. 489-507 . https://doi.org/10.1023/A:1018982711470 |
op_relation |
https://orbit.dtu.dk/en/publications/0c21e021-49c9-4140-a543-4dd4b8826243 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1023/A:1018982711470 |
_version_ |
1801371303354040320 |