Control of near-surface winds over an Antarctic ice shelf
Simple models are used to assess the factors controlling near-surface winds over an Antarctic ice shelf. Observations from Halley Station and an automatic weather station situated close to the coastal slopes adjoining the Brunt Ice Shelf are presented. These suggest that katabatic flows originating...
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American Geophysical Union
1993
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Online Access: | http://nora.nerc.ac.uk/id/eprint/517866/ https://doi.org/10.1029/92JD02425 |
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ftnerc:oai:nora.nerc.ac.uk:517866 2023-05-15T13:49:34+02:00 Control of near-surface winds over an Antarctic ice shelf King, J.C. 1993 http://nora.nerc.ac.uk/id/eprint/517866/ https://doi.org/10.1029/92JD02425 unknown American Geophysical Union King, J.C. orcid:0000-0003-3315-7568 . 1993 Control of near-surface winds over an Antarctic ice shelf. Journal of Geophysical Research, 98 (D7). 12949-12953. https://doi.org/10.1029/92JD02425 <https://doi.org/10.1029/92JD02425> Publication - Article PeerReviewed 1993 ftnerc https://doi.org/10.1029/92JD02425 2023-02-04T19:45:24Z Simple models are used to assess the factors controlling near-surface winds over an Antarctic ice shelf. Observations from Halley Station and an automatic weather station situated close to the coastal slopes adjoining the Brunt Ice Shelf are presented. These suggest that katabatic flows originating over the continental slopes adjust more quickly to the regional easterly flow over the ice shelf than is predicted by these simple models. It is suggested that nonlinear mechanisms such as “hydraulic jumps” or internal gravity wave radiation could lead to flow adjustment on the short space and time scales observed. In contrast with the present observations, katabatic flows have been observed to propagate across the Ross Ice Shelf for great distances with little modification. However, in this latter region the topography favors the formation of intense, channeled katabatic flow, while the katabatic flow onto the Brunt Ice Shelf is unconfined and consequently much weaker. Article in Journal/Newspaper Antarc* Antarctic Brunt Ice Shelf Ice Shelf Ross Ice Shelf Natural Environment Research Council: NERC Open Research Archive Antarctic Ross Ice Shelf Halley Station ENVELOPE(-26.541,-26.541,-75.581,-75.581) Brunt Ice Shelf ENVELOPE(-22.500,-22.500,-74.750,-74.750) Journal of Geophysical Research 98 D7 12949 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
Simple models are used to assess the factors controlling near-surface winds over an Antarctic ice shelf. Observations from Halley Station and an automatic weather station situated close to the coastal slopes adjoining the Brunt Ice Shelf are presented. These suggest that katabatic flows originating over the continental slopes adjust more quickly to the regional easterly flow over the ice shelf than is predicted by these simple models. It is suggested that nonlinear mechanisms such as “hydraulic jumps” or internal gravity wave radiation could lead to flow adjustment on the short space and time scales observed. In contrast with the present observations, katabatic flows have been observed to propagate across the Ross Ice Shelf for great distances with little modification. However, in this latter region the topography favors the formation of intense, channeled katabatic flow, while the katabatic flow onto the Brunt Ice Shelf is unconfined and consequently much weaker. |
format |
Article in Journal/Newspaper |
author |
King, J.C. |
spellingShingle |
King, J.C. Control of near-surface winds over an Antarctic ice shelf |
author_facet |
King, J.C. |
author_sort |
King, J.C. |
title |
Control of near-surface winds over an Antarctic ice shelf |
title_short |
Control of near-surface winds over an Antarctic ice shelf |
title_full |
Control of near-surface winds over an Antarctic ice shelf |
title_fullStr |
Control of near-surface winds over an Antarctic ice shelf |
title_full_unstemmed |
Control of near-surface winds over an Antarctic ice shelf |
title_sort |
control of near-surface winds over an antarctic ice shelf |
publisher |
American Geophysical Union |
publishDate |
1993 |
url |
http://nora.nerc.ac.uk/id/eprint/517866/ https://doi.org/10.1029/92JD02425 |
long_lat |
ENVELOPE(-26.541,-26.541,-75.581,-75.581) ENVELOPE(-22.500,-22.500,-74.750,-74.750) |
geographic |
Antarctic Ross Ice Shelf Halley Station Brunt Ice Shelf |
geographic_facet |
Antarctic Ross Ice Shelf Halley Station Brunt Ice Shelf |
genre |
Antarc* Antarctic Brunt Ice Shelf Ice Shelf Ross Ice Shelf |
genre_facet |
Antarc* Antarctic Brunt Ice Shelf Ice Shelf Ross Ice Shelf |
op_relation |
King, J.C. orcid:0000-0003-3315-7568 . 1993 Control of near-surface winds over an Antarctic ice shelf. Journal of Geophysical Research, 98 (D7). 12949-12953. https://doi.org/10.1029/92JD02425 <https://doi.org/10.1029/92JD02425> |
op_doi |
https://doi.org/10.1029/92JD02425 |
container_title |
Journal of Geophysical Research |
container_volume |
98 |
container_issue |
D7 |
container_start_page |
12949 |
_version_ |
1766251692213403648 |