Collaborative Research: West Antarctic Ice Sheet StabilityEntry ID: Mukhopadhyay_0338271
Abstract: The data set describes the cosmogenic 3He, 21Ne, and 10Be exposure ages of erratics and bedrock samples from the Ohio Range near the head of Mercer Ice Stream (formerly Ice Stream A) in the West Antarctic Ice Sheet (WAIS). The field location is situated in the Bottleneck, a unique, relatively narrow passage in the Transantarctic Mountains connecting the West and East Antarctic ice sheets. The ... location lies near the ice divide. The location of the glacial erractics constrain interior ice elevation in the past while the exposure ages constrain the timing of the ice highstand. Exposure ages of erractics along Mercer Ridge, on the Buckyee Table, provide a local proxy climate record. Glaciers on the Mercer Ridge are sensitive to changes in accumulation of snow and predominant wind direction. Compared to the record of the adjacent WAIS ice sheet fluctuations, the timing of alpine glacier advance yields information on climate changes in the Ohio Range that can be used to test climate reconstructions based on Antarctic ice core records.
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Data Set Citation
Dataset Originator/Creator: Sujoy Mukhopadhyay and Robert P. Ackert
Dataset Title: Exposure ages from the Ohio Range
Dataset Release Date: November 06, 2007.
ISO Topic Category
Email: sujoy at eps.harvard.edu
Province or State: MA
Postal Code: 02138
Robert P. Ackert, Sujoy Mukhopadhyay, Byron P. Parizek, and Harold Borns, Ice elevation near the West Antarctic Ice Sheet divide during the Last Glaciation. Geophysical Research Letters, In Press.
Robert P. Ackert Jr., Sujoy Mukhopadhyay, Byron Parizek, and Harold BornsSurface Exposure Ages of Glacial Erratics at the Ohio Range, Horlick Mountains. 10th International Symposium on Antarctic Earth Science (ISAES), Santa Barbara CA, Aug 2007
Robert P. Ackert Jr., Sujoy Mukhopadhyay, Aaron Putnam and Harold Borns. Surface exposure ages from the LGM trimline in the Ohio Range, Horlick Mountains. WAIS, 2006.
Creation and Review Dates
DIF Creation Date: 2007-08-02
Last DIF Revision Date: 2007-11-14