Weber, Michael E; Clark, Peter U; Ricken, Werner; Mitrovica, Jerry X; Hostetler, Steven W; Kuhn, Gerhard (2011): Colour reflectance and descriptions of seven sediment cores from the Weddell Sea. PANGAEA, https://doi.org/10.1594/PANGAEA.769686, Supplement to: Weber, ME et al. (2011): Interhemispheric ice-sheet synchronicity during the last glacial maximum. Science, 334(6060), 1265-1269, https://doi.org/10.1126/science.1209299
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The timing of the last maximum extent of the Antarctic ice sheets relative to those in the Northern Hemisphere remains poorly understood. We develop a chronology for the Weddell Sea sector of the East Antarctic Ice Sheet that, combined with ages from other Antarctic ice-sheet sectors, indicates that the advance to and retreat from their maximum extent was within dating uncertainties synchronous with most sectors of Northern Hemisphere ice sheets. Surface climate forcing of Antarctic mass balance would probably cause an opposite response, whereby a warming climate would increase accumulation but not surface melting. Our new data support teleconnections involving sea-level forcing from Northern Hemisphere ice sheets and changes in North Atlantic deep-water formation and attendant heat flux to Antarctic grounding lines to synchronize the hemispheric ice sheets.
Median Latitude: -73.846812 * Median Longitude: -28.201006 * South-bound Latitude: -74.241160 * West-bound Longitude: -35.511833 * North-bound Latitude: -73.422160 * East-bound Longitude: -26.422660
Date/Time Start: 1987-02-14T09:03:00 * Date/Time End: 1990-01-19T19:49:00
PS1498-2 (PS10/778) * Latitude: -73.490330 * Longitude: -35.511830 * Date/Time: 1987-02-14T09:03:00 * Elevation: -2818.0 m * Penetration: 14.5 m * Recovery: 8.96 m * Location: Weddell Sea * Campaign: ANT-V/4 (PS10) * Basis: Polarstern * Device: Gravity corer (Kiel type) (SL) * Comment: 10 core sections: 0-0.21, 0.21-1.08, 1.08-2.08, 2.08-3.08, 3.08-4.08, 4.08-4.96, 4.96-5.96, 5.96-6.96, 6.96-7.96, 7.96-8.96 m
PS1599-3 (PS12/319) * Latitude: -74.066500 * Longitude: -27.694000 * Date/Time: 1988-01-22T11:09:00 * Elevation: -2487.0 m * Penetration: 13.3 m * Recovery: 11.32 m * Location: Halley Bay * Campaign: ANT-VI/3 (PS12) * Basis: Polarstern * Device: Gravity corer (Kiel type) (SL) * Comment: 12 core sections: 0-0.56, 0.56-1.56, 1.56-2.44, 2.44-3.44, 3.44-4.44, 4.44-5.44, 5.44-6.44, 6.44-7.44, 7.44-8.44, 8.44-9.44, 9.44-10.44, 10.44-11.32 m; 0-156 in PC-Liner extracted from weight barrel
PS1789-1 (PS16/409) * Latitude: -74.241160 * Longitude: -27.300330 * Date/Time: 1990-01-13T11:10:00 * Elevation: -2411.0 m * Penetration: 15 m * Recovery: 14.35 m * Location: Lyddan Island * Campaign: ANT-VIII/5 (PS16) * Basis: Polarstern * Device: Gravity corer (Kiel type) (SL) * Comment: 15 core sections: 0-0.32, 0.32-1.32, 1.32-2.32, 2.32-3.32, 3.32-4.32, 4.32-5.33, 5.33-6.33, 6.33-7.34, 7.34-8.34, 8.34-9.34, 9.34-10.35, 10.35-11.35, 11.35-12.35, 12.35-13.35, 13.35-14.35 m