The penultimate deglaciation: High-resolution paleoceanographic evidence from a north south transect along the eastern Nordic Seas

Details The penultimate deglaciation: High-resolution paleoceanographic evidence from a north south transect along the eastern Nordic Seas The penultimate deglaciation: High-resolution paleoceanographic evidence from a north south transect along the eastern Nordic Seas

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006e%26psl.241..505r&link_type=abstract

Earth and Planetary Science Letters, Volume 241, Issue 3-4, p. 505-516.

Computer Science

8

Scientific paper

The penultimate termination has been studied with focus on oceanographic changes in the eastern Nordic Seas and the influence of these changes on the surrounding ice sheets and vice versa. Repeatedly, major changes in the strength of the Atlantic Meridional Overturning Circulation (AMOC) occurred during the studied interval. Times of strong overturning and increased heat transport northwards were of importance in triggering one minor and two major disintegration events. The two major disintegration events were separated by a deglacial pause, characterized by a strong AMOC. The same variability is seen throughout the eastern Nordic Seas, from the Faeroe Shetland Channel in the south to the Fram Strait in the north. Some of the oceanographic changes occurring during the penultimate termination are comparable with changes seen through the last deglaciation. Reduced winter moisture flux and increased summer melting due to the present insolation forcing further amplified the rate of ice sheet disintegration. Calculated sea-level change through TII shows a mean change of 121 ± 4 m, 41 ± 16 m in the first step and 80 ± 13 m in the last step.

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