Polar lows: The development of baroclinic disturbances in cold air outbreaks
Abstract The formation of small disturbances in cold air outbreaks over the north‐east Atlantic is shown to be due to baroclinic instability. A case study of two such disturbances shows their growth rate, wavelength and phase speed to be very close to the predictions of the baroclinic theory. Surfac...
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crwiley:10.1002/qj.49710042604 2024-06-02T08:11:47+00:00 Polar lows: The development of baroclinic disturbances in cold air outbreaks Mansfield, D. A. 1974 http://dx.doi.org/10.1002/qj.49710042604 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.49710042604 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.49710042604 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 100, issue 426, page 541-554 ISSN 0035-9009 1477-870X journal-article 1974 crwiley https://doi.org/10.1002/qj.49710042604 2024-05-03T11:57:52Z Abstract The formation of small disturbances in cold air outbreaks over the north‐east Atlantic is shown to be due to baroclinic instability. A case study of two such disturbances shows their growth rate, wavelength and phase speed to be very close to the predictions of the baroclinic theory. Surface friction is shown to have a very important effect; strong surface winds enhancing the friction and severely reducing the growth rate. Heating from the sea surface also reduces the growth rate. It is concluded that these lows will develop only when the surface winds are light and where the air flow is not parallel to sea‐surface isotherms, thus explaining their rarity compared to that of cold air outbreaks and providing more discriminating criteria for forecasting their development. Article in Journal/Newspaper North East Atlantic Wiley Online Library Quarterly Journal of the Royal Meteorological Society 100 426 541 554 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The formation of small disturbances in cold air outbreaks over the north‐east Atlantic is shown to be due to baroclinic instability. A case study of two such disturbances shows their growth rate, wavelength and phase speed to be very close to the predictions of the baroclinic theory. Surface friction is shown to have a very important effect; strong surface winds enhancing the friction and severely reducing the growth rate. Heating from the sea surface also reduces the growth rate. It is concluded that these lows will develop only when the surface winds are light and where the air flow is not parallel to sea‐surface isotherms, thus explaining their rarity compared to that of cold air outbreaks and providing more discriminating criteria for forecasting their development. |
format |
Article in Journal/Newspaper |
author |
Mansfield, D. A. |
spellingShingle |
Mansfield, D. A. Polar lows: The development of baroclinic disturbances in cold air outbreaks |
author_facet |
Mansfield, D. A. |
author_sort |
Mansfield, D. A. |
title |
Polar lows: The development of baroclinic disturbances in cold air outbreaks |
title_short |
Polar lows: The development of baroclinic disturbances in cold air outbreaks |
title_full |
Polar lows: The development of baroclinic disturbances in cold air outbreaks |
title_fullStr |
Polar lows: The development of baroclinic disturbances in cold air outbreaks |
title_full_unstemmed |
Polar lows: The development of baroclinic disturbances in cold air outbreaks |
title_sort |
polar lows: the development of baroclinic disturbances in cold air outbreaks |
publisher |
Wiley |
publishDate |
1974 |
url |
http://dx.doi.org/10.1002/qj.49710042604 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.49710042604 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.49710042604 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 100, issue 426, page 541-554 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/qj.49710042604 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
100 |
container_issue |
426 |
container_start_page |
541 |
op_container_end_page |
554 |
_version_ |
1800758038370451456 |