Skip to Main Content
Book Chapter

Climatic Fluctuations During the Late Pleistocene

By
C. C. Langway, Jr.
C. C. Langway, Jr.
Search for other works by this author on:
W. Dansgaard
W. Dansgaard
Search for other works by this author on:
S. J. Johnsen
S. J. Johnsen
Search for other works by this author on:
H. Clausen
H. Clausen
Search for other works by this author on:
Published:
January 01, 1973

The oxygen-isotope ratio in polar snow is determined mainly by the temperature of formation of the precipitating clouds. A continuous core 1,390 m long through the ice sheet at Camp Century, Greenland, reveals a climatic record, inferred from those ratios, spanning possibly the last 100,000 yrs. The depth-age relationship of the core is calculated from present ice-flow patterns and simple assumptions; the paleoclimatic data are interpreted from the analysis of oxygen-isotope-ratio measurements on nearly 7,000 individual samples cut from the core. The ice-core record reveals that the Wisconsin Stage started 73,000 yrs B.P. Many perturbations of the oxygen-isotope ratios are observed within the Wisconsin Stage that agree with climatic oscillations dated by radioactive methods. An 11 ‰ shift in the 0 isotope data shows that the Wisconsin Stage ended very rapidly, within a 2,500 yr interval, at about 13,000 yrs B.P. Spectral analyses of the data show oscillations with periods of 78, 181, 400, and 2,400 yrs.

You do not currently have access to this article.

Figures & Tables

Contents

GSA Memoirs

The Wisconsinan Stage

Robert F. Black
Robert F. Black
Search for other works by this author on:
Richard P. Goldthwait
Richard P. Goldthwait
Search for other works by this author on:
H. B. Willman
H. B. Willman
Search for other works by this author on:
Geological Society of America
Volume
136
ISBN print:
9780813711362
Publication date:
January 01, 1973

GeoRef

References

Related

Citing Books via

A comprehensive resource of eBooks for researchers in the Earth Sciences

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal