Conditions for Strong Wind Occurrences at Casey
This set is taken from a long simulation with a General Circulation Model. The extract used here is the pressure and temperature analyses of the 3d simulated atmosphere on days upon which strong surface winds are simulated at Casey. Taken from the abstract of the referenced paper: Strong wind events...
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Online Access: | https://researchdata.ands.org.au/conditions-strong-wind-occurrences-casey/700227 https://data.aad.gov.au/metadata/records/ASAC_517 http://nla.gov.au/nla.party-617536 |
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ftands:oai:ands.org.au::700227 2023-05-15T13:46:58+02:00 Conditions for Strong Wind Occurrences at Casey SIMMONDS, IAN (hasPrincipalInvestigator) SIMMONDS, IAN (processor) Australian Antarctic Data Centre (publisher) Spatial: northlimit=-66.28167; southlimit=-66.28167; westlimit=110.5275; eastLimit=110.5275; projection=WGS84 Temporal: From 2004-09-30 to 2005-03-31 https://researchdata.ands.org.au/conditions-strong-wind-occurrences-casey/700227 https://data.aad.gov.au/metadata/records/ASAC_517 http://nla.gov.au/nla.party-617536 unknown Australian Antarctic Data Centre https://researchdata.ands.org.au/conditions-strong-wind-occurrences-casey/700227 5c520c9e-3b6e-4142-8cc0-46b34862b27d ASAC_517 https://data.aad.gov.au/metadata/records/ASAC_517 http://nla.gov.au/nla.party-617536 Australian Antarctic Data Centre climatologyMeteorologyAtmosphere ANTICYCLONES/CYCLONES EARTH SCIENCE ATMOSPHERE ATMOSPHERIC PRESSURE SURFACE WINDS ATMOSPHERIC WINDS BLIZZARDS COASTAL ANTARCTICA KATABATIC FLOW STRONG WINDS SYNOPTIC SYSTEMS CONTINENT > ANTARCTICA > Casey GEOGRAPHIC REGION > POLAR dataset ftands 2020-01-05T21:17:19Z This set is taken from a long simulation with a General Circulation Model. The extract used here is the pressure and temperature analyses of the 3d simulated atmosphere on days upon which strong surface winds are simulated at Casey. Taken from the abstract of the referenced paper: Strong wind events occurring near Casey (Antarctica) in a long July GCM simulation have been studied to determine the relative roles played by the synoptic situation and the katabatic flow in producing these episodes. It has been found that the events are associated with strong katabatic and strong gradient flow operating together. Both components are found to increase threefold on average for these strong winds, and although the geostrophic flow is the stronger, it rarely produces strong winds without katabatic flow becoming stronger than it is in the mean. The two wind components do not flow in the same direction; indeed there is some cancellation between them, since katabatic flow acts in a predominant downslope direction, while the geostrophic wind acts across slope. The stronger geostrophic flow is associated with higher-than-average pressures over the continent and the approach of a strong cyclonic system toward the coast and a blocking system downstream. The anomalous synoptic patterns leading up to the occasions display a strong wavenumber 4 structure. The very strong katabatic flow appears to be related to the production of a supply of cold air inland from Casey by the stronger-than-average surface temperature inversions inland a few days before the strong winds occur. The acceleration of this negatively buoyant air mass down the steep, ice-sheet escarpment results in strong katabatic flow near the coast. Dataset Antarc* Antarctica Ice Sheet Research Data Australia (Australian National Data Service - ANDS) ENVELOPE(110.5275,110.5275,-66.28167,-66.28167) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
climatologyMeteorologyAtmosphere ANTICYCLONES/CYCLONES EARTH SCIENCE ATMOSPHERE ATMOSPHERIC PRESSURE SURFACE WINDS ATMOSPHERIC WINDS BLIZZARDS COASTAL ANTARCTICA KATABATIC FLOW STRONG WINDS SYNOPTIC SYSTEMS CONTINENT > ANTARCTICA > Casey GEOGRAPHIC REGION > POLAR |
spellingShingle |
climatologyMeteorologyAtmosphere ANTICYCLONES/CYCLONES EARTH SCIENCE ATMOSPHERE ATMOSPHERIC PRESSURE SURFACE WINDS ATMOSPHERIC WINDS BLIZZARDS COASTAL ANTARCTICA KATABATIC FLOW STRONG WINDS SYNOPTIC SYSTEMS CONTINENT > ANTARCTICA > Casey GEOGRAPHIC REGION > POLAR Conditions for Strong Wind Occurrences at Casey |
topic_facet |
climatologyMeteorologyAtmosphere ANTICYCLONES/CYCLONES EARTH SCIENCE ATMOSPHERE ATMOSPHERIC PRESSURE SURFACE WINDS ATMOSPHERIC WINDS BLIZZARDS COASTAL ANTARCTICA KATABATIC FLOW STRONG WINDS SYNOPTIC SYSTEMS CONTINENT > ANTARCTICA > Casey GEOGRAPHIC REGION > POLAR |
description |
This set is taken from a long simulation with a General Circulation Model. The extract used here is the pressure and temperature analyses of the 3d simulated atmosphere on days upon which strong surface winds are simulated at Casey. Taken from the abstract of the referenced paper: Strong wind events occurring near Casey (Antarctica) in a long July GCM simulation have been studied to determine the relative roles played by the synoptic situation and the katabatic flow in producing these episodes. It has been found that the events are associated with strong katabatic and strong gradient flow operating together. Both components are found to increase threefold on average for these strong winds, and although the geostrophic flow is the stronger, it rarely produces strong winds without katabatic flow becoming stronger than it is in the mean. The two wind components do not flow in the same direction; indeed there is some cancellation between them, since katabatic flow acts in a predominant downslope direction, while the geostrophic wind acts across slope. The stronger geostrophic flow is associated with higher-than-average pressures over the continent and the approach of a strong cyclonic system toward the coast and a blocking system downstream. The anomalous synoptic patterns leading up to the occasions display a strong wavenumber 4 structure. The very strong katabatic flow appears to be related to the production of a supply of cold air inland from Casey by the stronger-than-average surface temperature inversions inland a few days before the strong winds occur. The acceleration of this negatively buoyant air mass down the steep, ice-sheet escarpment results in strong katabatic flow near the coast. |
author2 |
SIMMONDS, IAN (hasPrincipalInvestigator) SIMMONDS, IAN (processor) Australian Antarctic Data Centre (publisher) |
format |
Dataset |
title |
Conditions for Strong Wind Occurrences at Casey |
title_short |
Conditions for Strong Wind Occurrences at Casey |
title_full |
Conditions for Strong Wind Occurrences at Casey |
title_fullStr |
Conditions for Strong Wind Occurrences at Casey |
title_full_unstemmed |
Conditions for Strong Wind Occurrences at Casey |
title_sort |
conditions for strong wind occurrences at casey |
publisher |
Australian Antarctic Data Centre |
url |
https://researchdata.ands.org.au/conditions-strong-wind-occurrences-casey/700227 https://data.aad.gov.au/metadata/records/ASAC_517 http://nla.gov.au/nla.party-617536 |
op_coverage |
Spatial: northlimit=-66.28167; southlimit=-66.28167; westlimit=110.5275; eastLimit=110.5275; projection=WGS84 Temporal: From 2004-09-30 to 2005-03-31 |
long_lat |
ENVELOPE(110.5275,110.5275,-66.28167,-66.28167) |
genre |
Antarc* Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctica Ice Sheet |
op_source |
Australian Antarctic Data Centre |
op_relation |
https://researchdata.ands.org.au/conditions-strong-wind-occurrences-casey/700227 5c520c9e-3b6e-4142-8cc0-46b34862b27d ASAC_517 https://data.aad.gov.au/metadata/records/ASAC_517 http://nla.gov.au/nla.party-617536 |
_version_ |
1766245902428667904 |