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Environmental Information in the Isotopic Record in Trees [and Discussion]

Epstein, S. and Krishnamurthy, R. V. and Oeschger, H. and Eddy, J. A. and Pecker, J.-C. (1990) Environmental Information in the Isotopic Record in Trees [and Discussion]. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, 330 (1615). pp. 427-439. ISSN 1364-503X. doi:10.1098/rsta.1990.0023.

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Twenty-three trees from widely different geographic locations and different environments were analysed for the δD and δ^(13)C records. The δD values suggested that the temperature of the Earth's surface rose over the past 100 years and probably for the past 1000 years. The rate of warming appears to be latitude dependent, greatest in the cooler areas. The δ^(13)C record, obtained for seven of the 23 trees, contain the δ^(13)C decrease due to the anthropogenic effect, the addition of CO_2 from coal and petroleum burning. This effect appears to be twice as high in the Northern Hemisphere as in the Southern Hemisphere.

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Additional Information:© 1990 Royal Society of London. Published 24 April 1990. We thank the late C. J. Ferguson for the dated bristlecone pine sample. We are grateful to the many colleagues (too numerous to list) who have contributed samples from different parts of the world. We acknowledge the help of C. Kendall, L. J. Randolph, E. Dent, S. Newman and J. Ruth for their technical assistance. We have benefited greatly from discussions with Professor M. J. DeNiro and Professor C. J. Yapp. Professor Yapp's contribution to this paper was particularly important in our discussions of his data. We are grateful for financial support from the NSF Grant No. EAR-8504096 and NSF Grant ATM80-8830. This is Contribution No. 4742 from the California Institute of Technology, Division of Geological and Planetary Sciences.
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Caltech Division of Geological and Planetary Sciences4742
Issue or Number:1615
Record Number:CaltechAUTHORS:20131031-092125486
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42150
Deposited By: Tony Diaz
Deposited On:31 Oct 2013 22:03
Last Modified:10 Nov 2021 16:19

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