Observation and modelling of gap flow and wake formation on Svalbard
Abstract Aircraft observations, satellite information and model simulations are presented for an episode with significant local disturbances in the vicinity of Spitsbergen, on the Svalbard archipelago in the Barents Sea. Relative weak upstream winds from the east gave rise to strong local winds in t...
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crwiley:10.1002/qj.782 2024-06-02T08:04:09+00:00 Observation and modelling of gap flow and wake formation on Svalbard Barstad, Idar Adakudlu, Muralidhar Norwegian Research Council's International Polar Year programme 2011 http://dx.doi.org/10.1002/qj.782 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.782 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.782 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Quarterly Journal of the Royal Meteorological Society volume 137, issue 660, page 1731-1738 ISSN 0035-9009 1477-870X journal-article 2011 crwiley https://doi.org/10.1002/qj.782 2024-05-03T11:42:24Z Abstract Aircraft observations, satellite information and model simulations are presented for an episode with significant local disturbances in the vicinity of Spitsbergen, on the Svalbard archipelago in the Barents Sea. Relative weak upstream winds from the east gave rise to strong local winds in the Hinlopen Strait which separates Spitsbergen from Nordaustlandet Island. The aircraft data included wind lidar, water vapour lidar and dropsonde observations. The aircraft flew through the Hinlopen Strait and found winds near 20 m s −1 in magnitude close to the surface. This is a factor of about four above the upstream wind magnitude. In the lee of the terrain, a wake with return currents was formed and this was clearly documented by the lidar observations. The model simulations reproduced the episodes with a high degree of fidelity. In the lee of the mountains, small‐scale cloud features appeared both in the lidar data and in the satellite observations. For wind directions with easterly and northerly components, these features are frequently observed on satellite pictures downstream of Spitsbergen. In the model framework, the cloud streamers were further investigated. Through sensitivity tests and more idealized simulations, it was found that the features plausibly stem from vertical circulations set up by the terrain and maintained by the positive buoyancy gained downstream over the relatively warm water. Copyright © 2011 Royal Meteorological Society Article in Journal/Newspaper Barents Sea Hinlopen Strait Nordaustlandet Svalbard Spitsbergen Wiley Online Library Barents Sea Nordaustlandet ENVELOPE(22.400,22.400,79.800,79.800) Svalbard Svalbard Archipelago Quarterly Journal of the Royal Meteorological Society 137 660 1731 1738 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Aircraft observations, satellite information and model simulations are presented for an episode with significant local disturbances in the vicinity of Spitsbergen, on the Svalbard archipelago in the Barents Sea. Relative weak upstream winds from the east gave rise to strong local winds in the Hinlopen Strait which separates Spitsbergen from Nordaustlandet Island. The aircraft data included wind lidar, water vapour lidar and dropsonde observations. The aircraft flew through the Hinlopen Strait and found winds near 20 m s −1 in magnitude close to the surface. This is a factor of about four above the upstream wind magnitude. In the lee of the terrain, a wake with return currents was formed and this was clearly documented by the lidar observations. The model simulations reproduced the episodes with a high degree of fidelity. In the lee of the mountains, small‐scale cloud features appeared both in the lidar data and in the satellite observations. For wind directions with easterly and northerly components, these features are frequently observed on satellite pictures downstream of Spitsbergen. In the model framework, the cloud streamers were further investigated. Through sensitivity tests and more idealized simulations, it was found that the features plausibly stem from vertical circulations set up by the terrain and maintained by the positive buoyancy gained downstream over the relatively warm water. Copyright © 2011 Royal Meteorological Society |
author2 |
Norwegian Research Council's International Polar Year programme |
format |
Article in Journal/Newspaper |
author |
Barstad, Idar Adakudlu, Muralidhar |
spellingShingle |
Barstad, Idar Adakudlu, Muralidhar Observation and modelling of gap flow and wake formation on Svalbard |
author_facet |
Barstad, Idar Adakudlu, Muralidhar |
author_sort |
Barstad, Idar |
title |
Observation and modelling of gap flow and wake formation on Svalbard |
title_short |
Observation and modelling of gap flow and wake formation on Svalbard |
title_full |
Observation and modelling of gap flow and wake formation on Svalbard |
title_fullStr |
Observation and modelling of gap flow and wake formation on Svalbard |
title_full_unstemmed |
Observation and modelling of gap flow and wake formation on Svalbard |
title_sort |
observation and modelling of gap flow and wake formation on svalbard |
publisher |
Wiley |
publishDate |
2011 |
url |
http://dx.doi.org/10.1002/qj.782 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fqj.782 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/qj.782 |
long_lat |
ENVELOPE(22.400,22.400,79.800,79.800) |
geographic |
Barents Sea Nordaustlandet Svalbard Svalbard Archipelago |
geographic_facet |
Barents Sea Nordaustlandet Svalbard Svalbard Archipelago |
genre |
Barents Sea Hinlopen Strait Nordaustlandet Svalbard Spitsbergen |
genre_facet |
Barents Sea Hinlopen Strait Nordaustlandet Svalbard Spitsbergen |
op_source |
Quarterly Journal of the Royal Meteorological Society volume 137, issue 660, page 1731-1738 ISSN 0035-9009 1477-870X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/qj.782 |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
137 |
container_issue |
660 |
container_start_page |
1731 |
op_container_end_page |
1738 |
_version_ |
1800748794800766976 |