Did massive glacial dewatering modify sedimentary structures on the Amundsen Sea Embayment shelf, West Antarctica?
نویسندگان
چکیده
منابع مشابه
Lead Sources to the Amundsen Sea, West Antarctica.
The global prevalence of industrial lead (Pb) contamination was exemplified decades ago by the predominance of anthropogenic Pb in samples of Antarctic surface ice and in Southern Ocean surface waters. Decreases in environmental Pb contamination corresponding with the near-global phase-out of leaded automobile gasoline beginning in the 1970s have since been observed. Measurements of Pb concentr...
متن کاملLimited grounding-line advance onto the West Antarctic continental shelf in the easternmost Amundsen Sea Embayment during the last glacial period
Precise knowledge about the extent of the West Antarctic Ice Sheet (WAIS) at the Last Glacial Maximum (LGM; c. 26.5-19 cal. ka BP) is important in order to 1) improve paleo-ice sheet reconstructions, 2) provide a robust empirical framework for calibrating paleo-ice sheet models, and 3) locate potential shelf refugia for Antarctic benthos during the last glacial period. However, reliable reconst...
متن کاملTropical forcing of Circumpolar Deep Water Inflow and outlet glacier thinning in the Amundsen Sea Embayment, West Antarctica
Outlet glaciers draining the Antarctic Ice Sheet into the Amundsen Sea 1 Embayment (ASE) have accelerated in recent decades, most likely as a result of increased 2 melting of their ice shelf termini by warm Circumpolar Deep Water (CDW). An ocean 3 model forced with climate reanalysis data shows that, beginning in the early 1990s, an 4 increase in westerly wind stress over the continental shelf ...
متن کاملAbbot Ice Shelf, structure of the Amundsen Sea continental margin and the southern boundary of the Bellingshausen Plate seaward of West Antarctica
Inversion of NASA Operation IceBridge airborne gravity over the Abbot Ice Shelf in West Antarctica for subice bathymetry defines an extensional terrain made up of east-west trending rift basins formed during the early stages of Antarctica/Zealandia rifting. Extension is minor, as rifting jumped north of Thurston Island early in the rifting process. The Amundsen Sea Embayment continental shelf w...
متن کاملOceanic heat transport onto the Amundsen Sea shelf through a submarine glacial trough
[1] Glaciers which drain the West Antarctic Ice Sheet (WAIS) into the Amundsen Sea are accelerating and thinning rapidly. These observations have been attributed to the regional oceanography whereby heat contained within Circumpolar Deep Water (CDW) drives the basal melting of floating glaciers. On the basis of new data we calculate that 2.8 terra-Watts (10) of oceanic heat flow onto the contin...
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ژورنال
عنوان ژورنال: Global and Planetary Change
سال: 2012
ISSN: 0921-8181
DOI: 10.1016/j.gloplacha.2012.04.006