Document Type

Conference Proceeding

Publication Title

Annals of Glaciology

Publication Date

2004

First Page

161

Last Page

168

Volume Number

39

Abstract/ Summary

Measurements of delta(34)S covering the years 1935-76 and including the 1963 Agung (Indonesia) eruption were made on a West Antarctic firn core, RIDSA (78.73 degrees S, 116.33 degrees W; 1740m a.s.l.), and results are used to unravel potential source functions in the sulfur cycle over West Antarctica. The delta(34)S values Of SO42- range from 3.1 parts per thousand to 9.9 parts per thousand. These values are lower than those reported for central Antarctica, from near South Pole station, of 9.3-18.1 parts per thousand (Patris and others, 2000). While the Agung period is isotopically distinct at South Pole, it is not in the RIDSA dataset, suggesting differences in the source associations for the sulfur cycle between these two regions. Given the relatively large input of marine aerosols at RIDSA (determined from Na+ data and the seasonal SO42- cycle), there is likely a large marine biogenic SO42- influence. The delta(34)S values indicate, however, that this marine biogenic SO42-, with a well-established delta(34)S of 18 parts per thousand, is mixing with SO42- that has extremely negative delta(34)S values to produce the measured isotope values in the RIDSA core. We suggest that the transport and deposition of stratospheric SO42- in West Antarctica, combined with local volcanic input, accounts for the observed variance in delta(34)S values.

Citation/Publisher Attribution

Pruett, LE, Kreutz, KJ, Wadleigh, M, Mayewski, PA, and Kurbatov, A, 2004, Sulfur Isotopic Measurements from a West Antarctic Ice Core: Implications for Sulfate Source and Transport: Annals of Glaciology, Vol 39, 2005, v. 39, p. 161-168. Available on publisher's site at: http://www.ingentaconnect.com/content/igsoc/agl/2004/00000039/00000001/art00025

Publisher Statement

© Copyright 2004 by the International Glaciological Society

DOI

10.3189/172756404781814339

Version

publisher's version of the published document

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