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The Arctic sea ice biomarker IP25: a review of current understanding, recommendations for future research and applications in palaeo sea ice reconstructions ArchiMer
Belt, Simon T.; Mueller, Juliane.
In recent years, a novel proxy for the past occurrence of Arctic sea ice has been proposed that is based on the variable marine sedimentary abundance of an organic geochemical lipid derived from sea ice diatoms in the spring. This lipid, termed IP25 (Ice Proxy with 25 carbon atoms), is a highly branched isoprenoid mono-unsaturated alkene that appears to be sufficiently stable in sediments to permit meaningful palaeo sea ice reconstructions to be carried out over short- to long-term timescales. Since the first proposed use of IP25 as a proxy for palaeo sea ice by Belt et al. (2007), a number of laboratories have measured this biomarker in Arctic sediments and it is anticipated that research activity in this area will increase further in the future. The...
Tipo: Text Palavras-chave: Sea ice; Arctic; Proxy; IP25; Biomarker; Palaeoclimate.
Ano: 2013 URL: https://archimer.ifremer.fr/doc/00263/37473/36537.pdf
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Abrupt climate changes for Iceland during the last millennium: Evidence from high resolution sea ice reconstructions ArchiMer
Masse, Guillaume; Rowland, Steven J.; Sicre, Marie-alexandrine; Jacob, Jeremy; Jansen, Eystein; Belt, Simon T..
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...
Tipo: Text Palavras-chave: Highly branched isoprenoid alkenes; Sea ice; Iceland; Sediments.
Ano: 2008 URL: https://archimer.ifremer.fr/doc/00237/34839/33273.pdf
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