Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published September 1999 | Published
Journal Article Open

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

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

Files

gbc523.pdf
Files (447.8 kB)
Name Size Download all
md5:da7d200528d7105bf92848d4b95f13db
447.8 kB Preview Download

Additional details

Created:
August 19, 2023
Modified:
October 24, 2023