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Preservation of methanesulphonic acid in frozen ice-core samples

Citation

Abram, NJ and Curran, MAJ and Mulvaney, R and Vance, TR, Preservation of methanesulphonic acid in frozen ice-core samples, Journal of Glaciology, 54, (187) pp. 680-684. ISSN 0022-1430 (2008) [Refereed Article]

DOI: doi:10.3189/002214308786570890

Abstract

Ice-core records of methanesulphonic acid (MSA) provide a potentially powerful tool for producing proxy records of sea ice, a critical but poorly understood component of the Earth's climate system. However, MSA is able to diffuse through solid ice, and here we examine the effect of two different methods of frozen storage on the preservation of MSA in archived ice-core samples. Re-analysis of archived ice sticks confirms that MSA diffuses out of ice cores archived in this manner. Despite MSA losses of up to 39% after 7 years storage, the ice sticks studied here preserve much of the variability of the original MSA record, suggesting that useful proxy records can be obtained from archived ice sticks. Furthermore, re-analysis of ice-core samples that had been refrozen into discrete bottled samples for storage demonstrates that it is possible to archive ice samples in a way that prevents MSA loss. In this case, accurate records of MSA variability and concentration were preserved even over storage periods of 15 years. This has important implications for the storage of ice cores and subsequent determination of MSA, and demonstrates that ice storage history needs to be considered when interpreting MSA records.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Physical Geography and Environmental Geoscience
Research Field:Glaciology
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Effects of Climate Change and Variability on Antarctic and Sub-Antarctic Environments (excl. Social Impacts)
Author:Curran, MAJ (Dr Mark Curran)
Author:Vance, TR (Dr Tessa Vance)
ID Code:71456
Year Published:2008
Web of Science® Times Cited:9
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2011-07-19
Last Modified:2012-08-30
Downloads:0

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