Biomarker proxies on ODP Holes 151-912A and 151-912B ...

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 Pr...

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Bibliographic Details
Main Authors: Stein, Ruediger, Fahl, Kirsten
Format: Dataset
Language:English
Published: PANGAEA 2013
Subjects:
Online Access:https://dx.doi.org/10.1594/pangaea.803128
https://doi.pangaea.de/10.1594/PANGAEA.803128
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Summary: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. ... : Supplement to: Stein, Ruediger; Fahl, Kirsten (2013): Biomarker proxy shows potential for studying the entire Quaternary Arctic sea ice history. Organic Geochemistry, 55, 98-102 ...