Atmospheric sensitivity to marginal‐ice‐zone drag: Local and global responses
The impact of a physically based parametrization of atmospheric drag over the marginal ice zone (MIZ) is evaluated through a series of regional and global atmospheric model simulations. The sea‐ice drag parametrization has recently been validated and tuned based on a large set of observations of sur...
Published in: | Quarterly Journal of the Royal Meteorological Society |
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crwiley:10.1002/qj.3486 2024-06-23T07:46:10+00:00 Atmospheric sensitivity to marginal‐ice‐zone drag: Local and global responses Renfrew, Ian A. Elvidge, Andrew D. Edwards, John M. Natural Environment Research Council 2019 http://dx.doi.org/10.1002/qj.3486 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.3486 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3486 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.3486 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3486 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Quarterly Journal of the Royal Meteorological Society volume 145, issue 720, page 1165-1179 ISSN 0035-9009 1477-870X journal-article 2019 crwiley https://doi.org/10.1002/qj.3486 2024-06-04T06:33:10Z The impact of a physically based parametrization of atmospheric drag over the marginal ice zone (MIZ) is evaluated through a series of regional and global atmospheric model simulations. The sea‐ice drag parametrization has recently been validated and tuned based on a large set of observations of surface momentum flux from the Barents Sea and Fram Strait. The regional simulations are from March 2013 and make use of a collection of cold‐air outbreak observations in the vicinity of the MIZ for validation. The global model analysis uses multiple 48 h forecasts taken from a standard test suite of simulations. Our focus is on the response of the modelled atmosphere to changes in the drag coefficient over the MIZ. We find that the parametrization of drag has a significant impact on the simulated atmospheric boundary layer; for example, changing the surface momentum flux by typically 0.1–0.2 N m −2 (comparable to the mean) and low‐level temperatures by 2–3 K in the vicinity of the MIZ. Comparisons against aircraft observations over and downwind of the MIZ show that simulations with the new sea‐ice drag scheme generally have the lowest bias and lowest root‐mean‐square errors. The wind speed and temperature biases are reduced by up to 0.5 m s −1 and 2 K respectively, compared to simulations with two settings of the previous drag scheme. In the global simulations the atmospheric response is widespread – impacting most of the Arctic and Antarctic sea‐ice areas – with the largest changes in the vicinity of the MIZ and affecting the entire atmospheric boundary layer. Article in Journal/Newspaper Antarc* Antarctic Arctic Barents Sea Fram Strait Sea ice Wiley Online Library Antarctic Arctic Barents Sea Quarterly Journal of the Royal Meteorological Society 145 720 1165 1179 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
The impact of a physically based parametrization of atmospheric drag over the marginal ice zone (MIZ) is evaluated through a series of regional and global atmospheric model simulations. The sea‐ice drag parametrization has recently been validated and tuned based on a large set of observations of surface momentum flux from the Barents Sea and Fram Strait. The regional simulations are from March 2013 and make use of a collection of cold‐air outbreak observations in the vicinity of the MIZ for validation. The global model analysis uses multiple 48 h forecasts taken from a standard test suite of simulations. Our focus is on the response of the modelled atmosphere to changes in the drag coefficient over the MIZ. We find that the parametrization of drag has a significant impact on the simulated atmospheric boundary layer; for example, changing the surface momentum flux by typically 0.1–0.2 N m −2 (comparable to the mean) and low‐level temperatures by 2–3 K in the vicinity of the MIZ. Comparisons against aircraft observations over and downwind of the MIZ show that simulations with the new sea‐ice drag scheme generally have the lowest bias and lowest root‐mean‐square errors. The wind speed and temperature biases are reduced by up to 0.5 m s −1 and 2 K respectively, compared to simulations with two settings of the previous drag scheme. In the global simulations the atmospheric response is widespread – impacting most of the Arctic and Antarctic sea‐ice areas – with the largest changes in the vicinity of the MIZ and affecting the entire atmospheric boundary layer. |
author2 |
Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Renfrew, Ian A. Elvidge, Andrew D. Edwards, John M. |
spellingShingle |
Renfrew, Ian A. Elvidge, Andrew D. Edwards, John M. Atmospheric sensitivity to marginal‐ice‐zone drag: Local and global responses |
author_facet |
Renfrew, Ian A. Elvidge, Andrew D. Edwards, John M. |
author_sort |
Renfrew, Ian A. |
title |
Atmospheric sensitivity to marginal‐ice‐zone drag: Local and global responses |
title_short |
Atmospheric sensitivity to marginal‐ice‐zone drag: Local and global responses |
title_full |
Atmospheric sensitivity to marginal‐ice‐zone drag: Local and global responses |
title_fullStr |
Atmospheric sensitivity to marginal‐ice‐zone drag: Local and global responses |
title_full_unstemmed |
Atmospheric sensitivity to marginal‐ice‐zone drag: Local and global responses |
title_sort |
atmospheric sensitivity to marginal‐ice‐zone drag: local and global responses |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1002/qj.3486 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.3486 https://onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3486 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/qj.3486 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.3486 |
geographic |
Antarctic Arctic Barents Sea |
geographic_facet |
Antarctic Arctic Barents Sea |
genre |
Antarc* Antarctic Arctic Barents Sea Fram Strait Sea ice |
genre_facet |
Antarc* Antarctic Arctic Barents Sea Fram Strait Sea ice |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 145, issue 720, page 1165-1179 ISSN 0035-9009 1477-870X |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/qj.3486 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
145 |
container_issue |
720 |
container_start_page |
1165 |
op_container_end_page |
1179 |
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1802644362275848192 |