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Field investigations on the snow chemistry in central and southern California—I. Inorganic ions and hydrogen peroxide

Gunz, Dieter W. and Hoffmann, Michael R. (1990) Field investigations on the snow chemistry in central and southern California—I. Inorganic ions and hydrogen peroxide. Atmospheric Environment Part A-General Topics, 24 (7). pp. 1661-1671. ISSN 0960-1686. https://resolver.caltech.edu/CaltechAUTHORS:20150813-105954946

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Abstract

Measurements of various inorganic species in snow collected in central and southern California during the winter of 1987–1988 indicate a combined influence of anthropogenic and maritime sources, depending on the meteorological conditions and wind patterns. Ion balance calculations revealed that organic acids are significant contributors to the overall chemical budget in snow samples. 60–95% of the total SO_4^(2−) was calculated to habe been derived from S(IV) oxidation. H_2O_2 concentrations up to 7.4 μmole ℓ^(−1) were analyzed in fresh snow. No systematic trends in the concentrations of H_2O_2 were observed during collection periods in marked contrast to the behavior of inorganic species (e.g. Na^+, Cl^−, SO_4^(2-), NO_3^−). H_2O_2 concentrations found in snow were 2–3 times lower than those found in rainwater collected during the same events at a lower elevation site, whereas inorganic ion levels were 2–7 times lower in snow. In an accumulated season snowpack a decrease of [H_2O_2] and an increase of [SO_4^(2−)] with depth was observed.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/0960-1686(90)90500-MDOIArticle
http://www.sciencedirect.com/science/article/pii/096016869090500MPublisherArticle
ORCID:
AuthorORCID
Hoffmann, Michael R.0000-0002-0432-6564
Additional Information:© 1990 Published by Elsevier Ltd. First received 19 December 1988 and in final form 4 August 1989. Support for this work was made available through funds provided by the Fonds zur Förderung der wissenschaftlichen Forsehung (Vienna, Austria) and the California Air Resources Board (Contr. # A6-185-32). We are also grateful to M. Williams of the University of California, Santa Barbara for the obtaining the snow cores from the Emerald Lake site. We acknowledge helpful discussions with B. C. Daube and the assistance of Erich Linse (California Air Resources Board, Meteorology Section) and Annie Esperanza (National Park Service) for providing the meteorological data.
Funders:
Funding AgencyGrant Number
California Air Resources Board (CARB)A6-185-32
Fonds zur Förderung der wissenschaftlichen ForsehungUNSPECIFIED
Subject Keywords:Inorganic snow chemistry; hydrogen peroxide in snow and rain
Issue or Number:7
Record Number:CaltechAUTHORS:20150813-105954946
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150813-105954946
Official Citation:Dieter W Gunz, Michael R Hoffmann, Field investigations on the snow chemistry in central and southern California—I. Inorganic ions and hydrogen peroxide, Atmospheric Environment. Part A. General Topics, Volume 24, Issue 7, 1990, Pages 1661-1671, ISSN 0960-1686, http://dx.doi.org/10.1016/0960-1686(90)90500-M. (http://www.sciencedirect.com/science/article/pii/096016869090500M)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59490
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:13 Aug 2015 20:41
Last Modified:03 Oct 2019 08:47

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