Biomarker proxy IP25 shows potential for studying entire Quaternary Arctic sea-ice history.

Stein, R. and Fahl, K. (2013) Biomarker proxy IP25 shows potential for studying entire Quaternary Arctic sea-ice history. Organic Geochemistry, 55 . pp. 98-102. DOI 10.1016/j.orggeochem.2012.11.005.

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Abstract

A novel and promising biomarker proxy for reconstruction of Arctic sea ice conditions was developed and is based on the determination of a highly branched isoprenoid with 25 carbons (IP25). IP25 records have been restricted to the last 150 kyr BP. We present a biomarker record from Ocean Drilling Program (ODP) Site 912, going back to the Pliocene–Pleistocene boundary and indicating that sea ice of variable extent occurred in the Fram Strait/southern Yermak Plateau area at least since about 2.2 Ma. Furthermore, our data support the idea that a combination of IP25 and open water, phytoplankton biomarker data (“PIP25 index”) may give a more reliable and quantitative estimate of past sea ice cover (at least for the study area). The study reveals that the novel IP25/PIP25 biomarker approach has potential for semi-quantitative paleo-sea ice studies covering the entire Quaternary and could motivate further detailed high resolution research on ODP/IODP material using this proxy.

Document Type: Article
Keywords: Biomarker proxy ; IP25; Quaternary; Arctic sea-ice ; ODP Site 912
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.orggeochem.2012.11.005
ISSN: 0146-6380
Projects: Transdrift, Laptev Sea System
Date Deposited: 28 Aug 2014 07:54
Last Modified: 28 Aug 2014 07:54
URI: http://oceanrep.geomar.de/id/eprint/25437

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