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Features of meteorological events preserved in a high-resolution Law Dome (East Antarctica) snow pit


McMorrow, AJ and Curran, MAJ and van Ommen, TD and Morgan, VI and Allison, I, Features of meteorological events preserved in a high-resolution Law Dome (East Antarctica) snow pit, Annals of Glaciology, 35 pp. 463-470. ISSN 0260-3055 (2002) [Refereed Article]

DOI: doi:10.3189/172756402781816780


Snow-pit and shallow firn-core records of oxygen isotope ratios (δ18O) and trace ion species were generated at a high-accumulation site on Law Dome, East Antarctica. Concordance between accumulation events identified in records up to 7.7 km apart confirms that the observed glaciochemical variations are the result of regional rather than local surface effects. This allows calibration of the snow-pit records with measured meteorological parameters. Net accumulation periods that comprise the snow-pit record are identified using hourly snow-accumulation measurements from a co-located automatic weather station (AWS). Particular focus is given to three net accumulation periods preserved during austral summer 1999/2000 that correspond to the top 0.5 m of the snow pit. Local meteorological conditions recorded during the summer accumulation periods by the AWS are combined with regional and synoptic-scale meteorology derived from Casey station (110 km away) and Advanced Very High Resolution Radiometer satellite imagery to identify potential source regions for chemical signals preserved in summer snow at Law Dome.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Physical geography and environmental geoscience
Research Field:Glaciology
Objective Division:Environmental Management
Objective Group:Other environmental management
Objective Field:Other environmental management not elsewhere classified
UTAS Author:McMorrow, AJ (Ms Alison McMorrow)
ID Code:26110
Year Published:2002
Web of Science® Times Cited:18
Deposited By:IASOS
Deposited On:2002-08-01
Last Modified:2011-08-02

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