Novel Highly Branched Isoprenoid Biomarkers as Indicators of Sea-Ice Diatoms: Implications for Historical Sea-Ice Records and Future Predictions

Guillaume Massé1, Simon Belt1, Steve Rowland1, Michel Poulin2, Bernard LeBlanc3 and Christine Michel3


1

Petroleum and Environmental Geochemistry Group, University of Plymouth, Drake Circus, Plymouth PL4 8AA, U.K.
2 Research Division, Canadian Museum of Nature, PO Box 3443, Station D, Ottawa, Ontario K1P 6P4, Canada
3 Freshwater Institute, Fisheries and Oceans Canada, Winnipeg, Manitoba, R3T 2N6, Canada

Presented at: 2nd Annual ArcticNet Scientific Meeting (ASM2005), Banff, Canada, 13-16 December 2005.

Download: Poster as an A4 pdf file.

Brief Summary

Polar oceans are important contributors to the Earth’s climate systems. In particular, sea-ice cover influences the exchanges of heat and moisture between polar oceans and the atmosphere, since it reflects much of incoming solar radiation. It is, therefore, essential to improve our knowledge of historical sea-ice fluctuations and the associated climate changes in order to better refine models of climate change. Although satellite imaging methods are now used routinely for sea-ice coverage determinations, we need to rely on so-called ‘proxy’ measures to interrogate the geological record. A good proxy should be Selective, Sensitive and Stable. We propose the use of Highly Branched Isoprenoid (HBI) alkenes as a novel proxy for Arctic sea-ice.

Download the complete poster as an A4 pdf file.



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