A signal of abrupt climate change in Alaska

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A signal of abrupt climate change in Alaska

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dc.contributor.author Hilchey, Heather en_US
dc.date.accessioned 2008-07-01T16:34:45Z
dc.date.available 2008-07-01T16:34:45Z
dc.date.issued 2005-03-02 en_US
dc.identifier.uri http://hdl.handle.net/10349/166
dc.description.abstract Hysteresis and ARM parameters for the top two meters of the 20 meter loess profile located at Gold Hill Steps, Alaska, indicate that variation in susceptibility, within the profile, is due to concentration and not composition of ferromagnetic grains, below the modern soil, and that this signal is not being influenced by pedogenic processes. As a result, the susceptibility profile can be used as a proxy for climate change, indicating that the region of increased susceptibility spanning a depth of 1.32-1.50m is part of a climate signal. Correlation between Gold Hill Steps and the Halfway House site, 50km away, whose susceptibility profile displays a similar increase in susceptibility dated at 11.6kyr ± 1.3kyr, provides preliminary evidence for the presence of the Younger Dryas climate change in Alaska. en_US
dc.description.sponsorship Carleton College en_US
dc.language.iso en en_US
dc.subject Younger Dryas en_US
dc.subject Magnetic Susceptibility en_US
dc.subject Alaska en_US
dc.subject Loess en_US
dc.subject Climate en_US
dc.title A signal of abrupt climate change in Alaska en_US
dc.type article en_US

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