Characteristics and radiocarbon ages of four retrogressive thaw slumps on Herschel Island and King Point
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| Sprache: | en |
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PANGAEA
2012
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| author | Lantuit, Hugues Pollard, Wayne H Couture, Nicole Fritz, Michael Schirrmeister, Lutz Meyer, Hanno Hubberten, Hans-Wolfgang |
| author_facet | Lantuit, Hugues Pollard, Wayne H Couture, Nicole Fritz, Michael Schirrmeister, Lutz Meyer, Hanno Hubberten, Hans-Wolfgang |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_810045 |
| institution | PANGAEA |
| language | en |
| publishDate | 2012 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Characteristics and radiocarbon ages of four retrogressive thaw slumps on Herschel Island and King Point Lantuit, Hugues Pollard, Wayne H Couture, Nicole Fritz, Michael Schirrmeister, Lutz Meyer, Hanno Hubberten, Hans-Wolfgang AWI_PerDyn; International Polar Year (2007-2008); IPY; Permafrost Research (Periglacial Dynamics) @ AWI 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. |
| title | Characteristics and radiocarbon ages of four retrogressive thaw slumps on Herschel Island and King Point |
| topic | AWI_PerDyn; International Polar Year (2007-2008); IPY; Permafrost Research (Periglacial Dynamics) @ AWI |
| url | https://doi.org/10.1594/PANGAEA.810045 |