Source Identification and Distribution Reveals Potential of the Geochemical Antarctic Sea Ice Proxy IPSO25

Lukas Smik1, Simon T. Belt1, Thomas A. Brown1, Jung-Hyun Kim2, Steven J. Rowland1, Claire S. Allen3, Joung-Ku Gal2, Kyung-Hoon Shin2, Jae Il Lee4, Kyle W.R. Taylor5


School of Geography, Earth and Environmental Sciences, University of Plymouth, Plymouth PL4 8AA U.K.
2 Department of Marine Science and ConvergenceTechnology, Hanyang University ERICA Campus, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan-si, Gyeonggi-do 426-791, South Korea
3 British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, U.K.
4 Korea Polar Research Institute, 26 Songdomirae-ro, Yeonsu-gu, Incheon 21990, South Korea
5 Isoprime Limited, Isoprime House, Earl Road, Cheadle Hulme, Stockport SK8 6PT, U.K.

Presented at: 12th International Conference on Paleoceanography, Utrecht, Netherlands, 29 August-2 September 2016.

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The biomarker IP25 has become a well-established proxy for seasonal sea ice in the Arctic, but has not been reported in the Antarctic. However, a close structural analogue of IP25 (so-called diene II; Fig. 1) has previously been proposed as a possible proxy measure of Antarctic sea ice. Unlike IP25, for which the source, seasonal production and distribution pattern across the Arctic has been determined through analysis of sea ice and several hundred surface sediments from different Arctic regions, no source has previously been identified for diene II, and reports of diene II in sea ice or surface sediments are limited in number. Indeed, the contrasting developmental stages of IP25 and diene II can been seen in Fig. 1.

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