Abrupt climate changes for Iceland during the last millennium: Evidence from high resolution sea ice reconstructions

A high resolution account of Icelandic sea ice over the last millennium has been constructed using a novel proxy based on the presence in sediments of a biomarker (IP25) produced by sea ice algae. Comparison with historical sea ice records demonstrates a strong correlation between documented sea ice...

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Bibliographic Details
Published in:Earth and Planetary Science Letters
Main Authors: Masse, Guillaume, Rowland, Steven J., Sicre, Marie-alexandrine, Jacob, Jeremy, Jansen, Eystein, Belt, Simon T.
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier Science Bv 2008
Subjects:
highly branched isoprenoid alkenes
sea ice
Iceland
sediments
ice algae
Sea ice
Online Access:https://archimer.ifremer.fr/doc/00237/34839/33273.pdf
https://doi.org/10.1016/j.epsl.2008.03.017
https://archimer.ifremer.fr/doc/00237/34839/
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Summary:A high resolution account of Icelandic sea ice over the last millennium has been constructed using a novel proxy based on the presence in sediments of a biomarker (IP25) produced by sea ice algae. Comparison with historical sea ice records demonstrates a strong correlation between documented sea ice Occurrences and the IP25 proxy. An excellent agreement is also observed between the IP25 record and a diatom-based sea surface temperature reconstruction obtained from the same core and the Crowley and Lowery Northern Hemisphere temperature reconstruction. Using this approach, we provide new historical sea ice data for periods where records are scarce or absent and evidence for abrupt changes to sea ice and/or climate conditions around Iceland during the Little Ice Age.

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