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Title: | Late quaternary glacial history constrains glacio-isostatic rebound in Enderby Land, East Antarctica |
Authors: | White, DA Fink, D |
Keywords: | Ices program Climates Isotopes Glaciers Quaternary period Antarctica |
Issue Date: | 1-Mar-2014 |
Publisher: | AGU Publications |
Citation: | White, D. A., & Fink, D. (2014). Late quaternary glacial history constrains glacio-isostatic rebound in Enderby Land, East Antarctica. Journal of Geophysical Research-Earth Surface, 119(3), 401-413. doi:10.1002/2013jf002870 |
Abstract: | Measurements of the loss or gain of ice mass from large ice sheets are presently achieved through satellite-based techniques such as GRACE (Gravity Recovery and Climate Experiment). The accuracy of these satellite-based measurements to changes in modern ice sheet mass depends on our knowledge of present-day glacio-isostatic crustal uplift rates caused by past ice sheet changes. To improve models of glacio-isostatic rebound in East Antarctica, we investigated ice histories along Rayner Glacier, Enderby Land, and a little explored sector of the ice sheet where GRACE data had suggested significant mass gain during the last decade. Observations from a recent glacial geomorphic reconnaissance coupled with cosmogenic nuclide dating indicate that in the lower part of the Rayner Glacier, Enderby Land, ice heights lowered by at least 300 m and the calving margin retreated by at least 10 km in the early Holocene (~6 to 9 ka B.P.). The magnitude and timing of deglaciation are consistent with ice histories used to model the postglacial rebound corrections for present-day GRACE mass trends. These observations strengthen the body of evidence that suggests ice mass gain in Enderby Land is presently partly offsetting mass loss in other parts of Antarctica.© 2014, American Geophysical Union. |
Gov't Doc #: | 7682 |
URI: | http://dx.doi.org/10.1002/2013jf002870 http://apo.ansto.gov.au/dspace/handle/10238/8138 |
Appears in Collections: | Journal Articles |
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