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A climatic record from 14C-dated wood fragments from southwestern Colorado

Global Biogeochemical Cycles

By:
, , and
DOI: 10.1029/1999GB900005

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Abstract

Deuterium concentrations in trees are related to the climatic temperature at which the trees grew. Deuterium analyses were made on all available (39) 14C-dated (all 14C dates cited are uncorrected) wood fragments collected from Lake Emma sediments. The 14C dates range from 9600 to 5400 'B.P.'. Tree line was above Lake Emma at 9600 'B.P.', was at Lake Emma at about 5000 'B.P.', and is 80 m below Lake Emma at the present time. The isotopic records at the various intervals of time coincide very well with this history. The range of ??D values is maximum at 9600 'B.P.' and is minimum at about 5400 'B.P.'. These data allow us to estimate the temperature range for the area between tree line and Lake Emma between these times. These results confirm previously observed cooling trends from several sources in the Western Hemisphere.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A climatic record from 14C-dated wood fragments from southwestern Colorado
Series title:
Global Biogeochemical Cycles
DOI:
10.1029/1999GB900005
Volume
13
Issue:
3
Year Published:
1999
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Global Biogeochemical Cycles
First page:
781
Last page:
784
Number of Pages:
4