The Atmospheric Boundary Layer and Surface Conditions during Katabatic Wind Events over the Terra Nova Bay Polynya
Off the coast of Victoria Land, Antarctica an area of open water—the Terra Nova Bay Polynya (TNBP)—persists throughout the austral winter. The development of this coastal polynya is driven by extreme katabatic winds blowing down the slopes of Transantarctic Mountains. The surface-atmosphere coupling...
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ftmdpi:oai:mdpi.com:/2072-4292/12/24/4160/ 2023-08-20T04:02:25+02:00 The Atmospheric Boundary Layer and Surface Conditions during Katabatic Wind Events over the Terra Nova Bay Polynya Marta Wenta John J. Cassano agris 2020-12-19 application/pdf https://doi.org/10.3390/rs12244160 EN eng Multidisciplinary Digital Publishing Institute Atmospheric Remote Sensing https://dx.doi.org/10.3390/rs12244160 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 12; Issue 24; Pages: 4160 atmospheric boundary layer sea ice–atmosphere interactions katabatic winds Text 2020 ftmdpi https://doi.org/10.3390/rs12244160 2023-08-01T00:41:55Z Off the coast of Victoria Land, Antarctica an area of open water—the Terra Nova Bay Polynya (TNBP)—persists throughout the austral winter. The development of this coastal polynya is driven by extreme katabatic winds blowing down the slopes of Transantarctic Mountains. The surface-atmosphere coupling and ABL transformation during the katabatic wind events between 18 and 25 September 2012 in Terra Nova Bay are studied, using observations from Aerosonde unmanned aircraft system (UAS), numerical modeling results and Antarctic Weather Station (AWS) measurements. First, we analyze how the persistence and strength of the katabatic winds relate to sea level pressure (SLP) changes in the region throughout the studied period. Secondly, the polynya extent variations are analysed in relation to wind speed changes. We conclude that the intensity of the flow, surface conditions in the bay and regional SLP fluctuations are all interconnected and contribute to polynya development. We also analyse the Antarctic Mesoscale Prediction System (AMPS) forecast for the studied period and find out that incorrect representation of vertical ABL properties over the TNBP might be caused by overestimated sea ice concentrations (SIC) used as model input. Altogether, this research provides a unique description of TNBP development and its interactions with the atmosphere and katabatic winds. Text Antarc* Antarctic Antarctica Sea ice Victoria Land MDPI Open Access Publishing Antarctic The Antarctic Austral Victoria Land Terra Nova Bay Transantarctic Mountains Remote Sensing 12 24 4160 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
atmospheric boundary layer sea ice–atmosphere interactions katabatic winds |
spellingShingle |
atmospheric boundary layer sea ice–atmosphere interactions katabatic winds Marta Wenta John J. Cassano The Atmospheric Boundary Layer and Surface Conditions during Katabatic Wind Events over the Terra Nova Bay Polynya |
topic_facet |
atmospheric boundary layer sea ice–atmosphere interactions katabatic winds |
description |
Off the coast of Victoria Land, Antarctica an area of open water—the Terra Nova Bay Polynya (TNBP)—persists throughout the austral winter. The development of this coastal polynya is driven by extreme katabatic winds blowing down the slopes of Transantarctic Mountains. The surface-atmosphere coupling and ABL transformation during the katabatic wind events between 18 and 25 September 2012 in Terra Nova Bay are studied, using observations from Aerosonde unmanned aircraft system (UAS), numerical modeling results and Antarctic Weather Station (AWS) measurements. First, we analyze how the persistence and strength of the katabatic winds relate to sea level pressure (SLP) changes in the region throughout the studied period. Secondly, the polynya extent variations are analysed in relation to wind speed changes. We conclude that the intensity of the flow, surface conditions in the bay and regional SLP fluctuations are all interconnected and contribute to polynya development. We also analyse the Antarctic Mesoscale Prediction System (AMPS) forecast for the studied period and find out that incorrect representation of vertical ABL properties over the TNBP might be caused by overestimated sea ice concentrations (SIC) used as model input. Altogether, this research provides a unique description of TNBP development and its interactions with the atmosphere and katabatic winds. |
format |
Text |
author |
Marta Wenta John J. Cassano |
author_facet |
Marta Wenta John J. Cassano |
author_sort |
Marta Wenta |
title |
The Atmospheric Boundary Layer and Surface Conditions during Katabatic Wind Events over the Terra Nova Bay Polynya |
title_short |
The Atmospheric Boundary Layer and Surface Conditions during Katabatic Wind Events over the Terra Nova Bay Polynya |
title_full |
The Atmospheric Boundary Layer and Surface Conditions during Katabatic Wind Events over the Terra Nova Bay Polynya |
title_fullStr |
The Atmospheric Boundary Layer and Surface Conditions during Katabatic Wind Events over the Terra Nova Bay Polynya |
title_full_unstemmed |
The Atmospheric Boundary Layer and Surface Conditions during Katabatic Wind Events over the Terra Nova Bay Polynya |
title_sort |
atmospheric boundary layer and surface conditions during katabatic wind events over the terra nova bay polynya |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/rs12244160 |
op_coverage |
agris |
geographic |
Antarctic The Antarctic Austral Victoria Land Terra Nova Bay Transantarctic Mountains |
geographic_facet |
Antarctic The Antarctic Austral Victoria Land Terra Nova Bay Transantarctic Mountains |
genre |
Antarc* Antarctic Antarctica Sea ice Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Victoria Land |
op_source |
Remote Sensing; Volume 12; Issue 24; Pages: 4160 |
op_relation |
Atmospheric Remote Sensing https://dx.doi.org/10.3390/rs12244160 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs12244160 |
container_title |
Remote Sensing |
container_volume |
12 |
container_issue |
24 |
container_start_page |
4160 |
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1774712867534143488 |