Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 15 September 1995:
Vol. 269. no. 5230, pp. 1565 - 1567
DOI: 10.1126/science.269.5230.1565
Prev | Table of Contents | Next

Articles

Late Glacial Climate Record of Midwestern United States from the Hydrogen Isotope Ratio of Lake Organic Matter

R. V. Krishnamurthy 1, K. A. Syrup 1, M. Baskaran 2, and A. Long 3

1 Department of Geology, Western Michigan University, Kalamazoo, MI 49008, USA.
2 Department of Marine Sciences, Texas A&M University, Galveston, TX 77553-1675, USA.
3 Department of Geosciences, University of Arizona, Tucson, AZ 85721, USA.

A hydrogen isotope time series obtained from an analysis of organic matter extracted from a lake core in Kalamazoo, southwestern Michigan, reveals four distinct isotope stages within the last 12,000 years that can be interpreted in terms of oscillations between cold and warm, dry climates. The most dramatic are a cold phase between 12,000 and 9000 years before present (B.P.), a warm, dry period between 8500 and 2000 years B.P., a cold period between 2000 and 1000 years B.P., and a warming trend since 1000 years B.P. The warming trend of the last 1000 years is comparable in magnitude to the mid-Holocene warm phase.

Submitted on December 27, 1994
Accepted on June 29, 1995


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Hydrogen isotope ratios of palmitic acid in lacustrine sediments record late Quaternary climate variations.
Y. Huang, B. Shuman, Y. Wang, and T. Webb III (2002)
Geology 30, 1103-1106
   Abstract »    Full Text »    PDF »
Reconstruction of postglacial to early Holocene vegetation history in terrestrial Central Europe via cuticular lipid biomarkers and pollen records from lake sediments.
L. Schwark, K. Zink, and J. Lechterbeck (2002)
Geology 30, 463-466
   Abstract »    Full Text »    PDF »
Mammalian S-phase checkpoint integrity is dependent on transformation status and purine deoxyribonucleosides.
C. Downes, C. Bachrati, S. Devlin, M Tommasino, T. Cutts, J. Watson, I Rasko, and R. Johnson (2000)
J. Cell Sci. 113, 1089-1096
   Abstract »    PDF »
Paleoclimate and Amerindians: Evidence from stable isotopes and atmospheric circulation.
M. B. Lovvorn, G. C. Frison, and L. L. Tieszen (2001)
PNAS 98, 2485-2490
   Abstract »    Full Text »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)