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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ftdoajarticles:oai:doaj.org/article:c16d0220e7e14fde82b9710bd822d731 2023-05-15T14:58:34+02:00 Assessment of Regional Climate Model Simulations of the Katabatic Boundary Layer Structure over Greenland Günther Heinemann 2020-06-01T00:00:00Z https://doi.org/10.3390/atmos11060571 https://doaj.org/article/c16d0220e7e14fde82b9710bd822d731 EN eng MDPI AG https://www.mdpi.com/2073-4433/11/6/571 https://doaj.org/toc/2073-4433 doi:10.3390/atmos11060571 2073-4433 https://doaj.org/article/c16d0220e7e14fde82b9710bd822d731 Atmosphere, Vol 11, Iss 571, p 571 (2020) katabatic wind Greenland stable boundary layer turbulence parameterization Meteorology. Climatology QC851-999 article 2020 ftdoajarticles https://doi.org/10.3390/atmos11060571 2022-12-31T13:51:50Z 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 Directory of Open Access Journals: DOAJ Articles Arctic Greenland Atmosphere 11 6 571 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
katabatic wind Greenland stable boundary layer turbulence parameterization Meteorology. Climatology QC851-999 |
spellingShingle |
katabatic wind Greenland stable boundary layer turbulence parameterization Meteorology. Climatology QC851-999 Günther Heinemann Assessment of Regional Climate Model Simulations of the Katabatic Boundary Layer Structure over Greenland |
topic_facet |
katabatic wind Greenland stable boundary layer turbulence parameterization Meteorology. Climatology QC851-999 |
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. |
format |
Article in Journal/Newspaper |
author |
Günther Heinemann |
author_facet |
Günther Heinemann |
author_sort |
Günther Heinemann |
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 |
publisher |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/atmos11060571 https://doaj.org/article/c16d0220e7e14fde82b9710bd822d731 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
Atmosphere, Vol 11, Iss 571, p 571 (2020) |
op_relation |
https://www.mdpi.com/2073-4433/11/6/571 https://doaj.org/toc/2073-4433 doi:10.3390/atmos11060571 2073-4433 https://doaj.org/article/c16d0220e7e14fde82b9710bd822d731 |
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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1766330702857502720 |