Characteristics and radiocarbon ages of four retrogressive thaw slumps on Herschel Island and King Point, supplement to: Lantuit, Hugues; Pollard, Wayne H; Couture, Nicole; Fritz, Michael; Schirrmeister, Lutz; Meyer, Hanno; Hubberten, Hans-Wolfgang (2012): Modern and late Holocene retrogressive thaw slump activity on the Yukon Coastal Plain and Herschel Island, Yukon Territory, Canada. Permafrost and Periglacial Processes, 23(1), 39-51

Four retrogressive thaw slumps (RTS) located on Herschel Island and the Yukon coast (King Point) in the western Canadian Arctic were investigated to compare the environmental, sedimentological and geochemical setting and characteristics of zones in active and stabilised slumps and at undisturbed sit...

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Bibliographic Details
Main Authors: Lantuit, Hugues, Pollard, Wayne H, Couture, Nicole, Fritz, Michael, Schirrmeister, Lutz, Meyer, Hanno, Hubberten, Hans-Wolfgang
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2012
Subjects:
International Polar Year 2007-2008 IPY
Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn
Arctic
Yukon
Canada
Herschel Island
Hanno
Pollard
King Point
Herschel
International Polar Year
IPY
permafrost
Tundra
Online Access:https://dx.doi.org/10.1594/pangaea.810045
https://doi.pangaea.de/10.1594/PANGAEA.810045
Description
Summary:Four retrogressive thaw slumps (RTS) located on Herschel Island and the Yukon coast (King Point) in the western Canadian Arctic were investigated to compare the environmental, sedimentological and geochemical setting and characteristics of zones in active and stabilised slumps and at undisturbed sites. In general, the slope, sedimentology and biogeochemistry of stabilised and undisturbed zones differ, independent of their age or location. Organic carbon contents were lower in slumps than in the surrounding tundra, and the density and compaction of slump sediments were much greater. Radiocarbon dating showed that RTS were likely to have been active around 300 a BP and are undergoing a similar period of increased activity now. This cycle is thought to be controlled more by local geometry, cryostratigraphy and the rate of coastal erosion than by variation in summer temperatures. : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150

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