Simulation of snowbands in the Baltic Sea area with the coupled atmosphere-ocean-ice model COSMO-CLM/NEMO
Wind-parallel bands of snowfall over the Baltic Sea area are common during late autumn and early winter. This phenomenon occurs when cold air flows over the warm water surface, enhancing convection and leading to heavy snow fall. Six snowband events from 1985 to 2010 are simulated by using the coupl...
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ftdoajarticles:oai:doaj.org/article:6419e2e8494c4d088a743771fb4f9686 2023-05-15T18:18:45+02:00 Simulation of snowbands in the Baltic Sea area with the coupled atmosphere-ocean-ice model COSMO-CLM/NEMO Trang Van Pham Jennifer Brauch Barbara Früh Bodo Ahrens 2017-02-01T00:00:00Z https://doi.org/10.1127/metz/2016/0775 https://doaj.org/article/6419e2e8494c4d088a743771fb4f9686 EN eng Borntraeger http://dx.doi.org/10.1127/metz/2016/0775 https://doaj.org/toc/0941-2948 0941-2948 doi:10.1127/metz/2016/0775 https://doaj.org/article/6419e2e8494c4d088a743771fb4f9686 Meteorologische Zeitschrift, Vol 26, Iss 1, Pp 71-82 (2017) convective snowbands lake effect Baltic Sea coupled model COSMO-CLM NEMO OASIS3 Meteorology. Climatology QC851-999 article 2017 ftdoajarticles https://doi.org/10.1127/metz/2016/0775 2022-12-30T22:24:09Z Wind-parallel bands of snowfall over the Baltic Sea area are common during late autumn and early winter. This phenomenon occurs when cold air flows over the warm water surface, enhancing convection and leading to heavy snow fall. Six snowband events from 1985 to 2010 are simulated by using the coupled atmosphere-ocean-ice model COSMO-CLM/NEMO. The model resolution is reasonably high to capture the snowbands; the atmospheric model COSMO-CLM has a horizontal grid-spacing of approximately 25 km and the ocean sea-ice model NEMO has a horizontal grid-spacing of approximately 3 km. The model results show that the coupled system COSMO-CLM/NEMO successfully reproduced the snowband events with a high contrast of temperatures between the surface and the atmosphere, sharp bands of precipitation over the sea, as well as the enormous heat fluxes released by the ocean to the atmosphere during the days when snowbands occurred. In the two cases when radar data are available, the model precipitation is shown to be in satisfactory agreement. The precipitation patterns closely follow the cloud shapes on satellite images. When not coupled with the ocean model, the atmospheric stand-alone model provided acceptable results if forced by high-quality sea surface temperatures (SSTs) from reanalysis data. However, COSMO-CLM forced with lower quality SSTs could not recreate the snowbands. The results indicate the need of an atmospheric model with high SST skill or a coupled ocean model when extreme event climatology is the primary aim in the Baltic Sea area. Article in Journal/Newspaper Sea ice Directory of Open Access Journals: DOAJ Articles Meteorologische Zeitschrift 26 1 71 82 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
convective snowbands lake effect Baltic Sea coupled model COSMO-CLM NEMO OASIS3 Meteorology. Climatology QC851-999 |
spellingShingle |
convective snowbands lake effect Baltic Sea coupled model COSMO-CLM NEMO OASIS3 Meteorology. Climatology QC851-999 Trang Van Pham Jennifer Brauch Barbara Früh Bodo Ahrens Simulation of snowbands in the Baltic Sea area with the coupled atmosphere-ocean-ice model COSMO-CLM/NEMO |
topic_facet |
convective snowbands lake effect Baltic Sea coupled model COSMO-CLM NEMO OASIS3 Meteorology. Climatology QC851-999 |
description |
Wind-parallel bands of snowfall over the Baltic Sea area are common during late autumn and early winter. This phenomenon occurs when cold air flows over the warm water surface, enhancing convection and leading to heavy snow fall. Six snowband events from 1985 to 2010 are simulated by using the coupled atmosphere-ocean-ice model COSMO-CLM/NEMO. The model resolution is reasonably high to capture the snowbands; the atmospheric model COSMO-CLM has a horizontal grid-spacing of approximately 25 km and the ocean sea-ice model NEMO has a horizontal grid-spacing of approximately 3 km. The model results show that the coupled system COSMO-CLM/NEMO successfully reproduced the snowband events with a high contrast of temperatures between the surface and the atmosphere, sharp bands of precipitation over the sea, as well as the enormous heat fluxes released by the ocean to the atmosphere during the days when snowbands occurred. In the two cases when radar data are available, the model precipitation is shown to be in satisfactory agreement. The precipitation patterns closely follow the cloud shapes on satellite images. When not coupled with the ocean model, the atmospheric stand-alone model provided acceptable results if forced by high-quality sea surface temperatures (SSTs) from reanalysis data. However, COSMO-CLM forced with lower quality SSTs could not recreate the snowbands. The results indicate the need of an atmospheric model with high SST skill or a coupled ocean model when extreme event climatology is the primary aim in the Baltic Sea area. |
format |
Article in Journal/Newspaper |
author |
Trang Van Pham Jennifer Brauch Barbara Früh Bodo Ahrens |
author_facet |
Trang Van Pham Jennifer Brauch Barbara Früh Bodo Ahrens |
author_sort |
Trang Van Pham |
title |
Simulation of snowbands in the Baltic Sea area with the coupled atmosphere-ocean-ice model COSMO-CLM/NEMO |
title_short |
Simulation of snowbands in the Baltic Sea area with the coupled atmosphere-ocean-ice model COSMO-CLM/NEMO |
title_full |
Simulation of snowbands in the Baltic Sea area with the coupled atmosphere-ocean-ice model COSMO-CLM/NEMO |
title_fullStr |
Simulation of snowbands in the Baltic Sea area with the coupled atmosphere-ocean-ice model COSMO-CLM/NEMO |
title_full_unstemmed |
Simulation of snowbands in the Baltic Sea area with the coupled atmosphere-ocean-ice model COSMO-CLM/NEMO |
title_sort |
simulation of snowbands in the baltic sea area with the coupled atmosphere-ocean-ice model cosmo-clm/nemo |
publisher |
Borntraeger |
publishDate |
2017 |
url |
https://doi.org/10.1127/metz/2016/0775 https://doaj.org/article/6419e2e8494c4d088a743771fb4f9686 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Meteorologische Zeitschrift, Vol 26, Iss 1, Pp 71-82 (2017) |
op_relation |
http://dx.doi.org/10.1127/metz/2016/0775 https://doaj.org/toc/0941-2948 0941-2948 doi:10.1127/metz/2016/0775 https://doaj.org/article/6419e2e8494c4d088a743771fb4f9686 |
op_doi |
https://doi.org/10.1127/metz/2016/0775 |
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Meteorologische Zeitschrift |
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26 |
container_issue |
1 |
container_start_page |
71 |
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82 |
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