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A 3500-Year Ice Chemistry Record From The Dominion Range, Antarctica: Linkages Between Climatic Variations and Precipitation Chemistry

Published online by Cambridge University Press:  20 January 2017

Mary Jo Spencer ,
Paul A. Mayewski ,
W. Berry Lyons ,
Mark S. Twickler  and
Pieter Grootes
Mary Jo Spencer
Affiliation:
Glacier Research Group, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, U.S.A.
Paul A. Mayewski
Affiliation:
Glacier Research Group, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, U.S.A.
W. Berry Lyons
Affiliation:
Glacier Research Group, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, U.S.A.
Mark S. Twickler
Affiliation:
Glacier Research Group, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH 03824, U.S.A.
Pieter Grootes
Affiliation:
Quaternary Research Center, University of Washington, Seattle, WA 98195, U.S.A.
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Abstract

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In 1984 a 200-m ice core was collected from a local accumulation basin in the Dominion Range, Transantarctic Mountains, Antarctica. A complete oxygen isotope record has been obtained and a considerable portion of the core has been analyzed in detail for chloride, nitrate, sulfate, and sodium. About half of the chloride is due to sea salt with the remainder originating as gaseous HCl. Nitrate levels have increased markedly over the last 1000 years whereas the levels of the other constituents have remained fairly constant.

The oxygen isotope results suggest that this region of Antarctica is responding to long-term global climate forcing as well as to shorter-term climatic variations. This data will be compared with the anion and sodium records in order to determine the effects of climatic forcing on these other records. In particular, nitrate appears to vary in concert with fluctuations in long-term climate. Additionally, variations in each constituent over the 3500 year period will be examined in detail to determine the influence of other processes which affect their concentrations.

Type
Research Article
Information
Annals of Glaciology , Volume 14 , 1990 , pp. 358
Copyright
Copyright © International Glaciological Society 1990