A 14,000-yr paleoenvironmental record from Windmill Lake, central Alaska: late-glacial and Holocene vegetation in the Alaska Range
A 14,000-yr paleoenvironmental record from Windmill Lake, central Alaska: late-glacial and Holocene vegetation in the Alaska Range
A 14,000 yr high-resolution pollen and lake-level record from Windmill Lake in central Alaska provides new evidence for the Late Pleistocene and Holocene paleoenvironments of this region. At 14,000 14Cyr BP, sparse herb tundra and low lake-levels indicate a cold, arid environment. About 11,800 14Cyr BP, the vegetation abruptly shifted to a shrub tundra and lake-levels increased, suggesting warmer and more mesic conditions. Ca 10,500-10,200 14Cyr BP, herbaceous taxa increased at the expense of the shrubs, suggesting a transient episode of climatic deterioration nearly contemporaneous with the Younger Dryas chronozone. By 8000 14Cyr BP, spruce was present in the watershed and alder grew locally by 6500 14Cyr BP. The AMS radiocarbon chronology indicates later expansions of Betula, Picea, and Alnus than at most sites in central Alaska, which are conventionally dated.
203-215
Bigelow, Nancy H.
81d39e1d-fe61-471e-a99c-021d0fde30fe
Edwards, Mary E.
4b6a3389-f3a4-4933-b8fd-acdfef72200e
January 2001
Bigelow, Nancy H.
81d39e1d-fe61-471e-a99c-021d0fde30fe
Edwards, Mary E.
4b6a3389-f3a4-4933-b8fd-acdfef72200e
Bigelow, Nancy H. and Edwards, Mary E.
(2001)
A 14,000-yr paleoenvironmental record from Windmill Lake, central Alaska: late-glacial and Holocene vegetation in the Alaska Range.
Quaternary Science Reviews, 20 (1-3), .
(doi:10.1016/S0277-3791(00)00122-0).
Abstract
A 14,000 yr high-resolution pollen and lake-level record from Windmill Lake in central Alaska provides new evidence for the Late Pleistocene and Holocene paleoenvironments of this region. At 14,000 14Cyr BP, sparse herb tundra and low lake-levels indicate a cold, arid environment. About 11,800 14Cyr BP, the vegetation abruptly shifted to a shrub tundra and lake-levels increased, suggesting warmer and more mesic conditions. Ca 10,500-10,200 14Cyr BP, herbaceous taxa increased at the expense of the shrubs, suggesting a transient episode of climatic deterioration nearly contemporaneous with the Younger Dryas chronozone. By 8000 14Cyr BP, spruce was present in the watershed and alder grew locally by 6500 14Cyr BP. The AMS radiocarbon chronology indicates later expansions of Betula, Picea, and Alnus than at most sites in central Alaska, which are conventionally dated.
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Published date: January 2001
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Local EPrints ID: 55308
URI: http://eprints.soton.ac.uk/id/eprint/55308
ISSN: 0277-3791
PURE UUID: b1afb184-f0f7-40ba-8a91-e5bdd9eaef1b
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Date deposited: 01 Aug 2008
Last modified: 16 Mar 2024 03:27
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Author:
Nancy H. Bigelow
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