Minimal late Holocene sea level rise in the Chukchi Sea: arctic insensitivity to global change?
Long-term estimates of sea level rise are essential for planning responses to anthropogenic global change. The tectonically stable, unglaciated eastern Chukchi Sea coast has numerous depositional environments for extracting long-term records in the absence of tide gauge data. Radiocarbon ages (n = 2...
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| Format: | Text |
| Language: | English |
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2001
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.512.8875 http://ruby.fgcu.edu/courses/twimberley/EnviroPol/EnviroPhilo/Mason.pdf |
| Summary: | Long-term estimates of sea level rise are essential for planning responses to anthropogenic global change. The tectonically stable, unglaciated eastern Chukchi Sea coast has numerous depositional environments for extracting long-term records in the absence of tide gauge data. Radiocarbon ages (n = 27) on paleo-marsh beds along several Seward Peninsula lagoons allows the reconstruction of sea level over the last 6000 years in northwest Alaska and indicate a modest sea level rise, 1.5 m, or 0.27 mm year 1. Neoglacial (1600–200 cal BC) storm deposits from Kotzebue Sound to Barrow are 1–1.5 m below modern storm surge elevations, supporting the inference of a lower eustatic sea level. Our data-constrained sea level curve establishes that the Chukchi Sea responds at a considerably slower rate than other regions of the world, supporting recent models of isostatic |
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