CaltechAUTHORS
  A Caltech Library Service

Sulfate in antarctic snow: Spatio-temporal distribution

Patterson, C. (1979) Sulfate in antarctic snow: Spatio-temporal distribution. Atmospheric Environment, 13 (7). p. 1063. ISSN 1352-2310 . http://resolver.caltech.edu/CaltechAUTHORS:20141028-103900958

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20141028-103900958

Abstract

Delmas and Boutron (1978) may have measured sulfate deposition from a major volcanic eruption recorded in Antarctic snow, and this involved concentrations of some 20 x 10^(-9) gg^(-1) sulfur superimposed on a background of 20 x 10^(-9) gg^(-1) sulfur. They suggest that this type of sulfate contribution may be superimposed on backgrounds of both marine and anthropogenic contributions in those snows. Their observations define upper limits to contributions of substances to polar snows by volcanic emissions. That is, major eruptions do not contribute more than sporadic additions of sulfate equal in amount to background concentrations. In normal polar regions we can assume for the maximum case that half the sulfate is contributed from volcanic sources while the remainder originates from marine and anthropogenic sources. On the basis of the sulfate data of Unni et al. (1978) and Herron et al. (1977), this would yield a sulfur concentration of 10 x 10^(-9) gg^(-1) sulfur from volcanoes in snow. Herron et al. (1977) claim that concentrations of lead in 1000-yr old arctic snows at levels of 0.05 x 10^(-9) gg^(-1) are not anthropogenic but originate from natural sources such as volcanic emissions. The Pb/S ratio in volcanic gas has been measured (Duce et al., 1978) and is found to be < 1 x 10^(-7) wt fraction. The amount of lead contributed to arctic snow from volcanic sources would therefore be on the order of 1 x 10^(-15) gg^(-1) lead in snow which is infinitesimally smaller than the concentrations they report to have been derived from natural sources. Such concentrations in fact did not exist in prehistoric times since, concentrations slightly less than 10^(-12) gg^(-1) lead are observed in 3000-yr old Arctic snow (Murozumi eta!., 1969).


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/0004-6981(79)90023-4DOIArticle
http://www.sciencedirect.com/science/article/pii/0004698179900234PublisherArticle
Additional Information:© 1979 Published by Elsevier Ltd.
Record Number:CaltechAUTHORS:20141028-103900958
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141028-103900958
Official Citation:C. Patterson, Sulfate in antarctic snow: Spatio-temporal distribution, Atmospheric Environment (1967), Volume 13, Issue 7, 1979, Page 1063, ISSN 0004-6981, http://dx.doi.org/10.1016/0004-6981(79)90023-4. (http://www.sciencedirect.com/science/article/pii/0004698179900234)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50928
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:28 Oct 2014 19:00
Last Modified:28 Oct 2014 19:00

Repository Staff Only: item control page