Assessment of regional climate model simulations of the katabatic boundary layer structure over Greenland
The parameterization of the boundary layer is a challenge for regional climate models of the Arctic. In particular, the stable boundary layer (SBL) over Greenland, being the main driver for substantial katabatic winds over the slopes, is simulated differently by different regional climate models or...
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ftunivtrier:oai:ubt.opus.hbz-nrw.de:1654 2024-01-14T10:04:24+01:00 Assessment of regional climate model simulations of the katabatic boundary layer structure over Greenland Heinemann, Günther The publication was funded by the Open Access Fund of Universität Trier and the German Research Foundation (DFG) 2020-06-01 application/pdf https://ubt.opus.hbz-nrw.de/frontdoor/index/index/docId/1654 https://nbn-resolving.org/urn:nbn:de:hbz:385-1-16541 https://doi.org/10.3390/atmos11060571 https://ubt.opus.hbz-nrw.de/files/1654/atmosphere-11-00571.pdf eng eng https://ubt.opus.hbz-nrw.de/frontdoor/index/index/docId/1654 urn:nbn:de:hbz:385-1-16541 doi:10.3390/atmos11060571 https://ubt.opus.hbz-nrw.de/files/1654/atmosphere-11-00571.pdf https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/openAccess Grönland 4022113-1 Katabatischer Wind 4520887-6 Atmosphärische Grenzschicht 4192517-8 Atmosphärische Turbulenz 4223965-5 Klima 4031170-3 Mathematisches Modell 4114528-8 Geografie Reisen ddc:910 article doc-type:article 2020 ftunivtrier https://doi.org/10.3390/atmos11060571 2023-12-17T23:34:58Z The parameterization of the boundary layer is a challenge for regional climate models of the Arctic. In particular, the stable boundary layer (SBL) over Greenland, being the main driver for substantial katabatic winds over the slopes, is simulated differently by different regional climate models or using different parameterizations of the same model. However, verification data sets with high-resolution profiles of the katabatic wind are rare. In the present paper, detailed aircraft measurements of profiles in the katabatic wind and automatic weather station data during the experiment KABEG (Katabatic wind and boundary-layer front experiment around Greenland) in April and May 1997 are used for the verification of the regional climate model COSMO-CLM (CCLM) nested in ERA-Interim reanalyses. CCLM is used in a forecast mode for the whole Arctic with 15 km resolution and is run in the standard configuration of SBL parameterization and with modified SBL parameterization. In the modified version, turbulent kinetic energy (TKE) production and the transfer coefficients for turbulent fluxes in the SBL are reduced, leading to higher stability of the SBL. This leads to a more realistic representation of the daily temperature cycle and of the SBL structure in terms of temperature and wind profiles for the lowest 200 m. Article in Journal/Newspaper Arctic Greenland Grönland Publication Server of Tier University (OPUS) Arctic Greenland Atmosphere 11 6 571 |
institution |
Open Polar |
collection |
Publication Server of Tier University (OPUS) |
op_collection_id |
ftunivtrier |
language |
English |
topic |
Grönland 4022113-1 Katabatischer Wind 4520887-6 Atmosphärische Grenzschicht 4192517-8 Atmosphärische Turbulenz 4223965-5 Klima 4031170-3 Mathematisches Modell 4114528-8 Geografie Reisen ddc:910 |
spellingShingle |
Grönland 4022113-1 Katabatischer Wind 4520887-6 Atmosphärische Grenzschicht 4192517-8 Atmosphärische Turbulenz 4223965-5 Klima 4031170-3 Mathematisches Modell 4114528-8 Geografie Reisen ddc:910 Heinemann, Günther Assessment of regional climate model simulations of the katabatic boundary layer structure over Greenland |
topic_facet |
Grönland 4022113-1 Katabatischer Wind 4520887-6 Atmosphärische Grenzschicht 4192517-8 Atmosphärische Turbulenz 4223965-5 Klima 4031170-3 Mathematisches Modell 4114528-8 Geografie Reisen ddc:910 |
description |
The parameterization of the boundary layer is a challenge for regional climate models of the Arctic. In particular, the stable boundary layer (SBL) over Greenland, being the main driver for substantial katabatic winds over the slopes, is simulated differently by different regional climate models or using different parameterizations of the same model. However, verification data sets with high-resolution profiles of the katabatic wind are rare. In the present paper, detailed aircraft measurements of profiles in the katabatic wind and automatic weather station data during the experiment KABEG (Katabatic wind and boundary-layer front experiment around Greenland) in April and May 1997 are used for the verification of the regional climate model COSMO-CLM (CCLM) nested in ERA-Interim reanalyses. CCLM is used in a forecast mode for the whole Arctic with 15 km resolution and is run in the standard configuration of SBL parameterization and with modified SBL parameterization. In the modified version, turbulent kinetic energy (TKE) production and the transfer coefficients for turbulent fluxes in the SBL are reduced, leading to higher stability of the SBL. This leads to a more realistic representation of the daily temperature cycle and of the SBL structure in terms of temperature and wind profiles for the lowest 200 m. |
author2 |
The publication was funded by the Open Access Fund of Universität Trier and the German Research Foundation (DFG) |
format |
Article in Journal/Newspaper |
author |
Heinemann, Günther |
author_facet |
Heinemann, Günther |
author_sort |
Heinemann, Günther |
title |
Assessment of regional climate model simulations of the katabatic boundary layer structure over Greenland |
title_short |
Assessment of regional climate model simulations of the katabatic boundary layer structure over Greenland |
title_full |
Assessment of regional climate model simulations of the katabatic boundary layer structure over Greenland |
title_fullStr |
Assessment of regional climate model simulations of the katabatic boundary layer structure over Greenland |
title_full_unstemmed |
Assessment of regional climate model simulations of the katabatic boundary layer structure over Greenland |
title_sort |
assessment of regional climate model simulations of the katabatic boundary layer structure over greenland |
publishDate |
2020 |
url |
https://ubt.opus.hbz-nrw.de/frontdoor/index/index/docId/1654 https://nbn-resolving.org/urn:nbn:de:hbz:385-1-16541 https://doi.org/10.3390/atmos11060571 https://ubt.opus.hbz-nrw.de/files/1654/atmosphere-11-00571.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Grönland |
genre_facet |
Arctic Greenland Grönland |
op_relation |
https://ubt.opus.hbz-nrw.de/frontdoor/index/index/docId/1654 urn:nbn:de:hbz:385-1-16541 doi:10.3390/atmos11060571 https://ubt.opus.hbz-nrw.de/files/1654/atmosphere-11-00571.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/deed.de info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/atmos11060571 |
container_title |
Atmosphere |
container_volume |
11 |
container_issue |
6 |
container_start_page |
571 |
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1788058937600245760 |