New analysis of sediments from the Camp Century ice core reveals that northwestern Greenland was ice-free during the Marine Isotope Stage (MIS) 11 interglacial period. This implies the Greenland Ice Sheet contributed to a significant rise in global sea levels during a time when global temperatures w
Newly examined sediments retrieved from the base of the Camp Century ice core in northwestern Greenland suggest that the region was ice-free during a significant historical period – the Marine Isotope Stage 11 interglacial period. This period is known to have some of the lowest global ice volumes recorded.The absence of ice in this region during the MIS 11 suggests that the Greenland Ice Sheet must have contributed over 1.
Christ et al. conclude, “If moderate warmth for 29 [thousand years] during MIS 11 resulted in significant ice loss from Greenland, then rapid, prolonged, and considerable anthropogenic Arctic warming will likely cause melting of the [Greenland Ice Sheet], raise sea level, and trigger additional climate feedbacks in the coming centuries.
Reference: “Deglaciation of northwestern Greenland during Marine Isotope Stage 11” by Andrew J. Christ, Tammy M. Rittenour, Paul R. Bierman, Benjamin A. Keisling, Paul C. Knutz, Tonny B. Thomsen, Nynke Keulen, Julie C. Fosdick, Sidney R. Hemming, Jean-Louis Tison, Pierre-Henri Blard, Jørgen P. Steffensen, Marc W. Caffee, Lee B. Corbett, Dorthe Dahl-Jensen, David P. Dethier, Alan J. Hidy, Nicolas Perdrial, Dorothy M. Peteet, Eric J. Steig and Elizabeth K.
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