Holocene Environmental Variability in the Arctic Gateway.

Spielhagen, Robert F., Müller, Juliane, Wagner, Axel, Werner, Kirstin, Lohmann, Gerrit, Prange, Matthias and Stein, Rüdiger (2015) Holocene Environmental Variability in the Arctic Gateway. In: Integrated Analysis of Interglacial Climate Dynamics (INTERDYNAMIC). , ed. by Schulz, Michael and Paul, Andre. Springer Briefs in Earth System Sciences . Springer, Berlin, pp. 37-42. ISBN 978-3-319-00692-5 DOI 10.1007/978-3-319-00693-2_7.

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Abstract

Environmental changes in the region connecting the Arctic Ocean and the northern North Atlantic were studied for the last 9,000 years (9 ka) by a combination of proxy-based paleoceanographic reconstructions as well as transient and time-slice simulations with climate models. Today, the area is perennially ice-covered in the west and ice-free in the east. Results show that sea-ice conditions were highly variable on short timescales in the last 9 ka. However, sea-ice proxies reveal an overall eastward movement of the sea-ice margin, in line with a decreasing influence of warm Atlantic Water advected to the Arctic Ocean. These cooling trends were rapidly reversed 100 years ago and replaced by the general warming in the Arctic. Model results show a consistently high freshwater input to the Arctic Ocean during the last 7 ka. The signal is robust against the Holocene cooling trend, however sensitive towards the warming trend of the last century. These results may play a role in the observed Arctic changes.

Document Type: Book chapter
Keywords: Arctic Ocean, Holocene, Sea ice, Atlantic Water, River run-off, Global warming
Research affiliation: AWI
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Open Access Journal?: No
DOI etc.: 10.1007/978-3-319-00693-2_7
Projects: Transdrift
Date Deposited: 06 Jan 2015 11:11
Last Modified: 14 Jan 2016 10:19
URI: http://oceanrep.geomar.de/id/eprint/26717

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