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

doi:10.1038/s41598-019-44231-1

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

Earth and Environmental Sciences-Twin Cities

Research output: Contribution to journal › Article › peer-review

9 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 language	English (US)
Article number	7880
Journal	Scientific reports
Volume	9
Issue number	1
DOIs	https://doi.org/10.1038/s41598-019-44231-1
State	Published - Dec 1 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.

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© 2019, The Author(s).

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title = "Millennial-scale glacial climate variability in Southeastern Alaska follows Dansgaard-Oeschger cyclicity",

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.",

author = "Wilcox, {Paul S.} and Dorale, {Jeffrey A.} and Baichtal, {James F.} and Christoph Sp{\"o}tl and Fowell, {Sarah J.} and Edwards, {R. Lawrence} and Kovarik, {Johanna L.}",

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: {\textcopyright} 2019, The Author(s).",

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AU - Fowell, Sarah J.

AU - Edwards, R. Lawrence

AU - Kovarik, Johanna L.

N1 - 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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N2 - 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.

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

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