Data

Physical Basis for Forecasting Strong Wind Events in the Antarctic Coastal Regions

Australian Antarctic Division
Simmonds, I. ; SIMMONDS, IAN
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://data.aad.gov.au/metadata/ASAC_632&rft.title=Physical Basis for Forecasting Strong Wind Events in the Antarctic Coastal Regions&rft.identifier=http://data.aad.gov.au/metadata/ASAC_632&rft.publisher=Australian Antarctic Data Centre&rft.description=The data set generated in this project is a long (10 years) climate model simulation, with the data over the Antarctic coastal region extracted. A subsidiary data set is episodes of strong simulated surface winds, particularly in the Casey region.From the abstract of one of the referenced papers:A climatology of anticyclones generated by an objective automatic scheme applied to 15 years of once-daily Australian Bureau of Meteorology hemispheric analyses is presented. Contour maps of the anticyclone system density, positions of formation and dissipation together with other statistics are shown. The distribution of anticyclones through the hemisphere was found to be dominated by a mid latitude belt of high density, located in the band 25-42 S typically 2-4 degrees south of the time-mean subtropical ridge. Within this band of the anticyclone density displays considerable structure with greater system numbers over the eastern parts of the three subtropical ocean basins in the vicinity of the three subtropical ocean time-mean anticyclones. During winter the system density displays a bifurcation in the New Zealand sector, with the highest density along the 30 and 45 degree S latitude bands. The movement of systems in the subtropical ocean basins was found to be in a general easterly direction with a weak equatorwards component, the transport of systems closely following the orientation of the belt of highest system density. In the vicinity of the African and South American continents, movement was more complex with east-south-east motion upstream, and east-north-east movement downstream, the net transport being such as to encourage a general steering of systems around the continental land masses more particularly during the warmer seasons. To highlight the dynamic role played by these systems and their cyclonic counterparts, we present a limited investigation of the response of Southern Hemisphere synoptic systems to variations of the broader atmospheric system and compare these findings to those obtained by more traditional analysis techniques.Progress Code: completedStatement: From one of the referenced papers: Data and analysis techniques The data analyses on which the current study is based are the 2300 GMT numerical analyses from the Australian Bureau of Meteorology, Melbourne Australia. These analyses are contained on a 47x47 polar stereographic grid centred on the south pole, giving a resolution of approximately 500 km. The earlier years of this analyses set have been used in a wide range of studies. The data used cover the 2300 GMT analyses for the 15-year period, February 1975 to March 1990.&rft.creator=Simmonds, I. &rft.creator=SIMMONDS, IAN &rft.date=2000&rft.coverage=westlimit=-180; southlimit=-80; eastlimit=180; northlimit=-45&rft.coverage=westlimit=-180; southlimit=-80; eastlimit=180; northlimit=-45&rft_rights=A pdf copy of one of the referenced papers is available for download from the provided URL to AAD staff only.&rft_rights=Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/legalcode&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_632 when using these data.&rft_rights=This metadata record is publicly available.&rft_subject=climatologyMeteorologyAtmosphere&rft_subject=EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > ANTICYCLONES/CYCLONES&rft_subject=EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS&rft_subject=EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > TELECONNECTIONS&rft_subject=BLIZZARD&rft_subject=COASTAL WEATHER&rft_subject=KATABATIC WIND&rft_subject=SYNOPTIC FORCING&rft_subject=weather systems&rft_subject=Computer > Computer&rft_subject=GCM > General Circulation Model&rft_subject=CEOS&rft_subject=AMD/AU&rft_subject=AMD&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=CONTINENT > ANTARCTICA&rft_subject=GEOGRAPHIC REGION > POLAR&rft_subject=GEOGRAPHIC REGION > SOUTHERN HEMISPHERE&rft.type=dataset&rft.language=English Access the data
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Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/legalcode

A pdf copy of one of the referenced papers is available for download from the provided URL to AAD staff only.

This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_632 when using these data.

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The data set generated in this project is a long (10 years) climate model simulation, with the data over the Antarctic coastal region extracted. A subsidiary data set is episodes of strong simulated surface winds, particularly in the Casey region.

From the abstract of one of the referenced papers:

A climatology of anticyclones generated by an objective automatic scheme applied to 15 years of once-daily Australian Bureau of Meteorology hemispheric analyses is presented. Contour maps of the anticyclone system density, positions of formation and dissipation together with other statistics are shown. The distribution of anticyclones through the hemisphere was found to be dominated by a mid latitude belt of high density, located in the band 25-42 S typically 2-4 degrees south of the time-mean subtropical ridge. Within this band of the anticyclone density displays considerable structure with greater system numbers over the eastern parts of the three subtropical ocean basins in the vicinity of the three subtropical ocean time-mean anticyclones. During winter the system density displays a bifurcation in the New Zealand sector, with the highest density along the 30 and 45 degree S latitude bands. The movement of systems in the subtropical ocean basins was found to be in a general easterly direction with a weak equatorwards component, the transport of systems closely following the orientation of the belt of highest system density. In the vicinity of the African and South American continents, movement was more complex with east-south-east motion upstream, and east-north-east movement downstream, the net transport being such as to encourage a general steering of systems around the continental land masses more particularly during the warmer seasons. To highlight the dynamic role played by these systems and their cyclonic counterparts, we present a limited investigation of the response of Southern Hemisphere synoptic systems to variations of the broader atmospheric system and compare these findings to those obtained by more traditional analysis techniques.

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Progress Code: completed
Statement: From one of the referenced papers: Data and analysis techniques The data analyses on which the current study is based are the 2300 GMT numerical analyses from the Australian Bureau of Meteorology, Melbourne Australia. These analyses are contained on a 47x47 polar stereographic grid centred on the south pole, giving a resolution of approximately 500 km. The earlier years of this analyses set have been used in a wide range of studies. The data used cover the 2300 GMT analyses for the 15-year period, February 1975 to March 1990.

Data time period: 1975-02-01 to 1990-03-31

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180,-45 180,-80 0,-80 -180,-80 -180,-45 0,-45 180,-45

0,-62.5

text: westlimit=-180; southlimit=-80; eastlimit=180; northlimit=-45

Subjects
AMD | AMD/AU | BLIZZARD | CEOS | COASTAL WEATHER | CONTINENT > ANTARCTICA | Computer > Computer | EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > ANTICYCLONES/CYCLONES | EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS | EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > TELECONNECTIONS | GCM > General Circulation Model | GEOGRAPHIC REGION > POLAR | GEOGRAPHIC REGION > SOUTHERN HEMISPHERE | KATABATIC WIND | OCEAN > SOUTHERN OCEAN | SYNOPTIC FORCING | climatologyMeteorologyAtmosphere | weather systems |

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Other Information
Public information for ASAC project 632 (PROJECT HOME PAGE)

url : https://projects.aad.gov.au/search_projects_results.cfm?project_no=632

Download point for the data - pdf document detailing the model used - AAD Staff Only (VIEW RELATED INFORMATION > PUBLICATIONS)

url : https://data.aad.gov.au/eds/1027/download

Citation reference for this metadata record and dataset (VIEW RELATED INFORMATION)

url : http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_632

Identifiers
  • global : ASAC_632
ACN 633 798 857