Stone, J. O. (2003) Holocene Deglaciation of Marie Byrd Land, West Antarctica. Science, 299 (5603). 99-102 doi:10.1126/science.1077998
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Holocene Deglaciation of Marie Byrd Land, West Antarctica | ||
| Journal | Science | ||
| Authors | Stone, J. O. | Author | |
| Year | 2003 (January 3) | Volume | 299 |
| Page(s) | 99-102 | Issue | 5603 |
| Publisher | American Association for the Advancement of Science (AAAS) | ||
| DOI | doi:10.1126/science.1077998Search in ResearchGate | ||
| Mindat Ref. ID | 2542386 | Long-form Identifier | mindat:1:5:2542386:4 |
| GUID | 74c4e796-9576-4804-aa12-95419dd87afb | ||
| Full Reference | Stone, J. O. (2003) Holocene Deglaciation of Marie Byrd Land, West Antarctica. Science, 299 (5603). 99-102 doi:10.1126/science.1077998 | ||
| Plain Text | Stone, J. O. (2003) Holocene Deglaciation of Marie Byrd Land, West Antarctica. Science, 299 (5603). 99-102 doi:10.1126/science.1077998 | ||
| In | (2003, January) Science Vol. 299 (5603) American Association for the Advancement of Science (AAAS) | ||
References Listed
These are the references the publisher has listed as being connected to the article. Please check the article itself for the full list of references which may differ. Not all references are currently linkable within the Digital Library.
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| R. B. Alley R. A. Bindschadler Eds. Antarct. Res. Ser. 77 (American Geophysical Union Washington DC 2001). | |
| The larger size higher elevation and more continental setting of the East Antarctic Ice Sheet retard its response to changes in climate and sea level. | |
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| Not Yet Imported: Science - journal-article : 10.1126/science.1068797 If you would like this item imported into the Digital Library, please contact us quoting Journal ID 72722 | |
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| Scherer et al. (8) discovered high concentrations of atmospherically derived 10 Be and diatom microfossils of Quaternary age in sediment cores from beneath Whillans Ice Stream (formerly “ice stream B”). They interpret these results to indicate that the interior Ross Embayment was an open marine basin at least once since 750 000 years B.P. | |
| J. A. Church et al. in Climate Change 2001: The Scientific Basis J. T. Houghton et al. Eds. (Cambridge Univ. Press Cambridge UK 2001) p. 639. | |
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| H. W. Borns in Antarct. Res. Ser. 77 R. B. Alley R. A. Bindschadler Eds. (American Geophysical Union Washington DC 2001) p. 59. | |
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| Details of experimental methods calculations and 10 Be data are available as supporting material on Science Online. | |
| Ages reflect cumulative exposure to cosmic radiation. Rocks from glacial deposits can give anomalously old ages if they are recycled from older deposits or derived from an exposed source area such as a mountainside or talus slope. Other conditions such as snow cover delayed emergence after deposition deep within a moraine or disturbance by frost heaving can produce anomalously young ages. We avoided sites and samples prone to snow or sediment cover or to periglacial disturbance. We therefore regard the young ages as reliable and attribute the old “ages” to previous exposure. | |
| Reconstructing the surface slope and elevation of the Boyd Glacier from transects on Mount Darling Mount Blades and Mount Rea (fig. S1) shows that a cluster of ∼1100-m peaks in the eastern Sarnoff Mountains may have stood above the LGM ice surface. We examined these peaks but found no glacial deposits on them. Either flow lines terminating on their flanks did not connect with debris sources upstream or the peaks were capped during the LGM by a small local ice dome flowing outward. | |
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| E. J. Steig et al. in Antarct. Res. Ser. 77 R. B. Alley R. A. Bindschadler Eds. (American Geophysical Union Washington DC 2001) p. 75. | |
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| N. R. J. Hulton unpublished data. | |
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| Antarctic ice cores record substantially higher snow accumulation rates in the Holocene than during the LGM. Accumulationdoubled at Vostok and Dome C and increased by factors of 2.5 and 4 to 5 at Byrd Station and Taylor Dome respectively. It appears that coastal sites experienced the greatest contrasts supporting the idea that increased accumulation contributed to delayed deglaciation in Marie Byrd Land. | |
| Ingólfsson, Ólafur, Hjort, Christian, Berkman, Paul A., Björck, Svante, Colhoun, Eric, Goodwin, Ian D., Hall, Brenda, Hirakawa, Kazuomi, Melles, Martin, Möller, Per, Prentice, Michael L. (1998) Antarctic glacial history since the Last Glacial Maximum: an overview of the record on land. Antarctic Science, 10 (3). 326-344 doi:10.1017/s095410209800039x |
| Interpretation of very recent changes in glacier height is complicated by ice fields skirting many of the peaks. Erratics must have been transported and deposited by glaciers ablating against the mountain sides requiring flow driven by surface gradients sloping toward the mountains. Most peaks are now surrounded by ice fields sloping outward. Our estimates of thinning depend on whether the erratics emerged from beneath through-flowing glacier ice at a time when the glaciers abutted the peaks directly or after the present pattern of skirting ice fields developed. In the first case glacier axes must have stood higher than the erratics at the time of deglaciation. In the latter case the elevations of the glacier axes may not have changed much since deglaciation. Although this makes it difficult to resolve very recent changes it is a minor consideration for samples located hundreds of meters above the modern glaciers. | |
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| Fahenstock M. A., Scambos T. A., Bindschadler R. A., Kvaran G., J. Glaciol. 46, 155 (2000). | |
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| Far from the ice sheets relative sea level changes (i.e. changes in the relative height of land and sea causing coastlines to move landward or seaward) are strongly influenced by hydro-isostasy a deepening of the ocean basins and tilting of continental margins in response to loading by meltwater. Modeled sea level changes in Africa Australia and other far-field sites assuming synchronous melting of ice sheets predict greater falls in relative sea level (∼4 to 5 m) since 7000 years B.P. than those observed (1 to 3 m). The explanation for the difference invoked by Nakada and Lambeck (34) but not substantiated until the recent discovery of late WAIS deglaciation is continued meltwater addition to the oceans since 7000 years B.P. | |
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| On the basis of the volume difference between the LGM reconstruction of Hughes et al. (42) which we take as a maximum estimate of the LGM ice sheet in West Antarctica and the present-day ice sheet in the sector draining across the coast from Thwaites Glacier (110°W) to Edward VII Peninsula(158°W). The volume of 5.1 × 10 5 km 3 (LGM to present) corresponds to ∼1.4 m of esl of which ∼ 0.4 m would have been released since 10 000 years B.P. Glacier profiles interpolated between our elevation transects suggest that more than half of this volume (∼0.2 to 0.3 m of esl) was released after 7000 years B.P. (fig. S1). | |
| T. J. Hughes et al. in The Last Great Ice Sheets G. H. Denton T. J. Hughes Eds. (Wiley New York 1981) pp. 263–317. | |
| H. Liu K. Jezek B. Li Z. Zhao Radarsat Antarctic Mapping Project Digital Elevation Model Version 2 (National Snow and Ice Data Center Boulder CO 2001); available at . | |
| Scientific Committee on Antarctic Research Antarctic Digital Database Version 4.0 [cited 4 December 2002]; available at www.nerc-bas.ac.uk/public/magic/add_main.html. | |
| This work was supported by NSF grants DPP-9909778 and DPP-9615282. We thank the staff of the U.S. Antarctic Program and M. Roberts and C. Kugelman for help with all aspects of the fieldwork C. Kurnick and B. Johns of UNAVCO Inc. for high-precision Global Positioning System measurements and K. Lambeck and T. Purcell for assistance with ice-volume calculations. P. Apostle K. Krigbaum and D. Carrasco contributed to the laboratory work. |
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