erosion of intrusive body, then uplift -- but how much? intrusive body
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Erosion of intrusive body, then uplift -- but how much?
Intrusivebody
Holocene and Pleistocene Sedimentation on the Antarctic Shelf
Why study this topic?
1) Holocene: period of dramatic S. Ocean changes w/o large CO2 change.2) Pleistocene orbital cycles: 41K, 100K, CO2 chicken and egg, Ice/Ocean
feedback.3) Estimate volumes/profiles of the ice sheet – grounding lines…..4) Pleistocene instabilities of west Antarctic ice, 400Kyr, 1100 Kyr5) Ultra-high resolution records of climate change and Antarctic Margin
productivity
CO2
variations2
Holocene and Pleistocene Sedimentation on the Antarctic Shelf
Why study this topic?
1) Holocene: period of dramatic S. Ocean changes w/o large CO2 change.2) Pleistocene orbital cycles: 41K, 100K, CO2 chicken and egg, Ice/Ocean
feedback.3) Estimate volumes/profiles of the ice sheet – grounding lines…..4) Pleistocene instabilities of west Antarctic ice, 400Kyr, 1100 Kyr5) Ultra-high resolution records of climate change and Antarctic Margin
productivity
CO2 from EPICA ice core analysis
Siegenhalter, et al., Science 310, 1313-1317, 2005
Brook (2005)
Light Purple: Altitude > 3000mRed: Slope < 1/1000Blue: Snow accumulation < 5g/cm2/yearGreen: Auroral oval below the horizonGray: Limit of visibility for geostationary satellites.
Byrd
Taylor Dome
Siple
Holocene and Pleistocene Sedimentation on the Antarctic Shelf
Why study this topic?
1) Holocene: period of dramatic S. Ocean changes w/o large CO2 change.2) Pleistocene orbital cycles: 41K, 100K, CO2 chicken and egg, Ice/Ocean
feedback.3) Estimate volumes/profiles of the ice sheet – studies of grounding lines and
how the ice actually retreats…..4) Pleistocene instabilities of west Antarctic ice, 400Kyr, 1100 Kyr5) Ultra-high resolution records of climate change and Antarctic Margin
productivity
LGM in Lambert-Amery region
Loewe Massif
Mount LanyonMawson Escarpment
Mount Ruker
Mount Lanyon
GSA Today – December, 2006
Holocene and Pleistocene Sedimentation on the Antarctic Shelf
Why study this topic?
1) Holocene: period of dramatic S. Ocean changes w/o large CO2 change.2) Pleistocene orbital cycles: 41K, 100K, CO2 chicken and egg, Ice/Ocean
feedback.3) Estimate volumes/profiles of the ice sheet – studies of grounding lines and
how the ice actually retreats…..4) Pleistocene instabilities of west Antarctic ice at 120 kyr, 400kyr, 1100 kyr5) Ultra-high resolution records of climate change and Antarctic Margin
productivity