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Modeling of ancient climate from deuterium content of water in volcanic glass

Quaternary International

By:
, , ,
DOI: 10.1016/1040-6182(92)90029-2

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Abstract

The explosive nature of the eruptions that produced rhyolitic tephras resulted in the ash being distributed over large areas. This ash, within a few thousand years after deposition, incorporated relatively large amounts of environmental water (up to 3.5%) into the glass structure. This hydration water is shown to retain its original deuterium concentration through time, and because the deuterium content of precipitation has been used for climate characterization, the hydration water, which is related to ancient precipitation, can be used to investigate ancient climates. Based on the analysis of ash samples dated at 13,700, 11,200 and 8500 BP, the climate in the states of Washington and Montana may have been about 3-6??C cooler at the end of the Pleistocene or Early Holocene than the present. We observe no change in the deuterium concentration of surface waters, and hence climate, in that region post-8500 BP. ?? 1992.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Modeling of ancient climate from deuterium content of water in volcanic glass
Series title:
Quaternary International
DOI:
10.1016/1040-6182(92)90029-2
Volume
13-14
Issue:
C
Year Published:
1992
Language:
English
Publisher:
Elsevier
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Quaternary International
First page:
201
Last page:
203
Number of Pages:
3