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Science 7 December 1990:
Vol. 250. no. 4986, pp. 1383 - 1385
DOI: 10.1126/science.250.4986.1383
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Articles

A Possible Younger Dryas Record in Southeastern Alaska

D. R. Engstrom 1, B. C. S. Hansen 1, and H. E. Wright Jr. 1

1 Limnological Research Center, University of Minnesota, Minneapolis, MN 55455

A stratigraphic record of climatic cooling equal in timing and severity to the Younger Dryas event of the North Atlantic region has been obtained from lacustrine sediments in the Glacier Bay area of southeastern Alaska. Fossil pollen show that a late Wisconsin pine parkland was replaced about 10,800 years ago by shrub- and herb-dominated tundra, which lasted until about 9,800 years ago. This vegetational change is matched by geochemical evidence for loss of organic matter from catchment soils and increased mineral erosion. If this event represents the Younger Dryas, then an explanation for a hemisphere-wide propagation of a North Atlantic climatic perturbation must be sought.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Glacier readvance during the late glacial (Younger Dryas?) in the Ahklun Mountains, southwestern Alaska.
(2002)
Geology 30, 679-682
Multi-proxy Holocene palaeoclimatic record from a saline lake in the Canadian Subarctic.
R. Pienitz, J. P. Smol, W. M. Last, P. R. Leavitt, and B. F. Cumming (2000)
The Holocene 10, 673-686
   Abstract »    PDF »
Rapid response of alpine timberline vegetation to the Younger Dryas climate oscillation in the Colorado Rocky Mountains, USA.
M. A. Reasoner and M. A. Jodry (2000)
Geology 28, 51-54
   Abstract »    Full Text »    PDF »
Paleoindians in Beringia: Evidence from Arctic Alaska.
M. L. Kunz, M. L. Kunz, and R. E. Reanier (1994)
Science 263, 660-662
   Abstract »    PDF »
The Colonization of Beringia and the Peopling of the New World.
J. F. Hoffecker, J. F. Hoffecker, W. R. Powers, and T. Goebel (1993)
Science 259, 46-53
   Abstract »    PDF »
Dating methods.
W. C. Mahaney (1991)
Progress in Physical Geography 15, 304-309
   PDF »
Allerod--Younger Dryas Lake Temperatures from Midge Fossils in Atlantic Canada.
I. R. Walker, I. R. WALKER, R. J. MOTT, and J. P. SMOL (1991)
Science 253, 1010-1012
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Science. ISSN 0036-8075 (print), 1095-9203 (online)