The role of the formation and destruction of the Hudson Strait glacial ice dam in changes of climate and sea level during the Last Interglacial-Glacial transition
Keywords:Heinrich events, Glacial climate change, Barbados reefs, Glacial sea levels
During the Last interglacial period of constant sea level, large coral reefs formed on the tectonically rising island of Barbados, and a broad lagoon with a small barrier reef formed at the Cane Vale site. The constant sea level was ended by a rapid glaciation, causing a fall of world sea level of 2.4 m, as measured by surveys of features associated with breaking waves on Barbados. The fall began about 120 ka BP, and lasted roughly 400 years, according to a lake pollen record from western Europe. That rapid fall was terminated at a wave-cut step on Barbados and with a quite small reversal in falling sea level. The rise was caused by rapid melting of the marine-based Barents Sea ice dome and other ice masses, due to a restored strong Atlantic Meridional Overturning Circulation (AMOC) flow. The sea level fall then resumed until it was halted at a wave-cut step at a world sea level 12.3 m below the last interglacial level, as recorded at the University of the West Indies site on Barbados. Following the erosion of that second step, a zonal northern North Atlantic circulation prevailed, causing a glacial ice-volume decrease and rise in sea level of 3.8 m. These two sea level fall reversals were caused respectively by the formation and destruction of a Hudson Strait ice dam and the resulting increase and much later decrease in the rate of AMOC flow.
Mesolella, K.J., (1968) The uplifted reefs of Barbados, Ph.D. thesis, Brown University, Providence, RI.
Mesolella, K.J., R.K. Mathews, W.S. Broecker, and D.I. Thurber (1969) The astronomical theory of climate change: Barbados Data, Journal of Geology, vol. 77, p. 250-274.
Bender, M.I., R.G. Fairbanks, F.W. Taylor, R.K. Mathews, J.G. Goddard, and W.S. Broecker (1979) Uranium-series dating of the Pleistocene reef tracts of Barbados, West Indies, Geological Society of America Bulletin, vol. 90 p. 577-594.
Mesolella, K.J., H.A. Sealy, and R.K. Mathews (1970) Facies geometries within Pleistocene reefs of Barbados, American Association Petroleum Geologists Bulletin 543, p. 1899-1917.
Johnson, R.G., (2001) Last Interglacial sea stands on Barbados and an early anomalous deglaciation timed by differential uplift, Journal of Geophysical Research, vol. 108, No. C6, p. 11543-11551.
Brauer, A., G.H. Haug, P. Dubski, D.M. Sigman, and J.F.W. Negendank (2008) An abrupt wind shift in western Europe at the onset of the Younger Dryas cold period, Nature Geoscience, vol. 1, p. 520-523.
Johnson, R.G., (2021) Hudson Strait ice dam collapse: an explanation for the onset of the Younger Dryas cold climate in Europe in only one year, Journal of Advances in Natural Sciences, vol.8 ISSN 2393-9257, DOI. https//doi.org/10.24297/jns.v81.89614.
Field, M.H., B. Huntley, and H. Müller (1994) Eemian climate fluctuations observed in a European pollen record, Nature, vol. 371, p. 779-783.9.
Ruddiman, W.F., and A. McIntyre (1979) Warmth of subpolar North Atlantic Ocean during Northern Hemisphere ice sheet growth, Science, vol. 204, p. 173-175.
Johnson, R.G., (2015) Initiation of the last ice age in Canada by extreme precipitation resulting from a cascade of oceanic salinity increases, Journal of Advances in Natural Sciences, vol. 3, p. 237-252.
Straneo, F., and F. Saucier (2008) The outflow from Hudson Strait and its contribution to the Labrador Current, Deep Sea Research Part 1 Oceanographic Papers 55(8), DOI: 10.1016/j.dsr.2008.03.012
Stravers, J.A., G.H. Miller, and D.S. Kaufman (1992) Late glacial ice margins and deglacial chronology for southeastern Baffin Island and Hudson Strait, eastern Canadian Arctic, Canadian Journal of Earth Science, vol. 29, p. 1000-1917.
Fairbanks, R.G. (1990) The age and origin of the “Younger Dryas climate event” in Greenland ice cores, Paleoceanography, vol. 5, p. 937-948.
Adam, D.P., (1976) Hudson Bay, Lake Zissaga and the growth of the Laurentide ice sheet, Nature, vol. 261, p. 72-73.
Ross, M., P. Lajaunesse, and K.G.A. Kovar (2021) The subglacial record of Northern Hudson Bay: insights into the Hudson Strait Ice Stream catchment, Boreas, vol. 40, p. 73-91, 10.1111/j.1502-3885.3010.00176x.ISSN 0300-9483
Culberg, R., D.M. Schroeder, and W. Chu (2021) Extreme melt layers reduce firn permeability across Greenland, Nature Communications Article, doi.org/10.1038/s41467-021-22636-5
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