Millennial-scale glacial climate variability in Southeastern Alaska follows Dansgaard-Oeschger cyclicity

Paul S. Wilcox, Jeffrey A. Dorale, James F. Baichtal, Christoph Spötl, Sarah J. Fowell, R. Lawrence Edwards, Johanna L. Kovarik

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A stalagmite from Prince of Wales Island grew episodically between ~75,000 and ~11,100 yr BP; interrupted by seven hiatuses. Hiatuses most likely correspond to permafrost development and a temperature drop of up to 5 °C from modern conditions. Intervals of calcite deposition place tight constraints on the timing of mild climatic episodes in Alaska during the last glacial period, when permafrost was absent, allowing water infiltration into the karst system. These periods of calcite deposition are synchronous, within dating uncertainties, with Greenland Interstadials 1, 10, 11, 12c, 14b-14e, 16.1a, 17.2, and 20c.

Original languageEnglish (US)
Article number7880
JournalScientific reports
Volume9
Issue number1
DOIs
StatePublished - May 27 2019

Bibliographical note

Funding Information:
This work was funded by the University of Alaska Global Change Grant, the Alaska Space Grant, The University of Alaska Geist Fund, Alaska NASA EPSCoR, the University of Innsbruck, and the Alaska Geological Society. We would also like to thank the USDA Forest Service, Tongass National Forest Geology Program for the support they provided logistically in the field and the journal referees for their constructive comments.

Publisher Copyright:
© 2019, The Author(s).

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