Holocene Environmental Variability in the Arctic Gateway


Contact
gerrit.lohmann [ at ] awi.de

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.



Item Type
Inbook
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
Peer-reviewed
Publication Status
Published
Eprint ID
38187
DOI 10.1007/978-3-319-00693-2_7

Cite as
Spielhagen, R. F. , Müller, J. , Wagner, A. , Werner, K. , Lohmann, G. , Prange, M. and Stein, R. (2015): Holocene Environmental Variability in the Arctic Gateway / M. Schulz and A. Paul (editors) , In: Integrated Analysis of Interglacial Climate Dynamics (INTERDYNAMIC), Integrated Analysis of Interglacial Climate Dynamics (INTERDYNAMIC), Heidelberg, Springer, ISBN: 978-3-319-00692-5 . doi: 10.1007/978-3-319-00693-2_7


Share


Citation

Research Platforms
N/A

Campaigns


Actions
Edit Item Edit Item