Biomarker distributions in surface sediments from the Central Arctic Ocean and adjacent marginal seas ...
Records of the spatial and temporal variability of Arctic Ocean sea ice are of significance for understanding the causes of the dramatic decrease in Arctic sea-ice cover of recent years. In this context, the newly developed sea-ice proxy IP25, a mono-unsaturated highly branched isoprenoid alkene wit...
Main Authors: | , , , |
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Format: | Dataset |
Language: | English |
Published: |
PANGAEA
2015
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Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.819526 https://doi.pangaea.de/10.1594/PANGAEA.819526 |
Summary: | Records of the spatial and temporal variability of Arctic Ocean sea ice are of significance for understanding the causes of the dramatic decrease in Arctic sea-ice cover of recent years. In this context, the newly developed sea-ice proxy IP25, a mono-unsaturated highly branched isoprenoid alkene with 25 carbon atoms biosynthesized specifically by sea-ice associated diatoms and only found in Arctic and sub-Arctic marine sediments, has been used to reconstruct the recent spatial sea-ice distribution. The phytoplankton biomarkers 24S-brassicasterol and dinosterol were determined alongside IP25 to distinguish ice-free or permanent ice conditions, and to estimate the sea-ice conditions semi-quantitatively by means of the phytoplankton-IP25 index (PIP25). Within our study, for the first time a comprehensive data set of these biomarkers was produced using fresh and deep-frozen surface sediment samples from the Central Arctic Ocean proper (>80°N latitude) characterised by a permanent ice cover today and recently ... : Supplement to: Xiao, Xiaotong; Fahl, Kirsten; Müller, Juliane; Stein, Ruediger (2015): Sea-ice distribution in the modern Arctic Ocean: Biomarker records from trans-Arctic Ocean surface sediments. Geochimica et Cosmochimica Acta, 155, 16-29 ... |
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