[Parameters: Topic='ATMOSPHERE', Term='ATMOSPHERIC PRESSURE', Variable_Level_1='ANTICYCLONES/CYCLONES']
Physical Basis for Forecasting Strong Wind Events in the Antarctic Coastal RegionsEntry ID: ASAC_632
Abstract: 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.
Start Date: 1975-02-01Stop Date: 1990-03-31
Latitude Resolution: 4 degrees
Longitude Resolution: 4 degrees
Temporal Resolution: 15 min
ISO Topic Category
Quality 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.
Access Constraints A pdf copy of one of the referenced papers is available for download from the provided URL.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference at the provided URL when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 2.3 MB
Distribution Format: pdf
Role: TECHNICAL CONTACT
Phone: +61 3 9344 7216
Fax: +61 3 9344 7761
Email: simmonds at unimelb.edu.au
University of Melbourne School of Earth Sciences
Province or State: Victoria
Postal Code: 3052
Role: DIF AUTHOR
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: dave.connell at aad.gov.au
Australian Antarctic Division 203 Channel Highway
Province or State: Tasmania
Postal Code: 7050
Jones D.A., Simmonds I. (1994) A climatology of Southern Hemisphere anticyclones. Climate Dynamics 10. 333-348
Murphy B., Simmonds I. (1993) An analysis of strong wind events simulated in a GCM near Casey in the Antarctic. Monthly Weather Review 121. 522
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2000-07-28
Last DIF Revision Date: 2014-01-10