A climatic record from ^(14)C-dated wood fragments from southwestern Colorado
- Creators
- Epstein, Samuel
- Xu, Xiaomei
- Carrara, Paul
Abstract
Deuterium concentration in trees are related to the climatic temperature at which the Trees grew. Deuterium analyses were made on all available (39) ^(14)C-dated (all ^(14)C dates cited are uncorrected) wood fragments collected from Lake Emma sediments. The ^(14)C 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 δD 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 Information
© 1999 by the American Geophysical Union. Received March 30, 1998; revised December 3, 1998; accepted January 28, 1999. We thank C. Yapp and C. Brunstein for advice and reviews and S. Mickinnon for technical assistance. This work is supported by NSF (ATM9219891).Attached Files
Published - gbc523.pdf
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Additional details
- Eprint ID
- 38931
- Resolver ID
- CaltechAUTHORS:20130612-162036396
- NSF
- ATM 9219891
- Created
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2013-06-13Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field