Biomarker distributions in surface sediments from the Central Arctic Ocean and adjacent marginal seas ...

• Main Authors: Xiao, Xiaotong, Stein, Ruediger, Fahl, Kirsten, Müller, Juliane
• Format: Dataset
• Language: English
• Published: PANGAEA 2015
• Subjects: Event label; Latitude of event; Longitude of event; Elevation of event; DEPTH, sediment/rock; Carbon, organic, total; 2,6,10,14-Tetramethyl-7-3-methylpent-4-enylpentadecane, per unit mass total organic carbon; 2,10,14-Trimethyl-6-enyl-7-3-methylpent-1-enylpentadecene, per unit mass total organic carbon; 24-Methylcholesta-5,22E-dien-3beta-ol, per unit mass total organic carbon; 4alpha,23,24-Trimethyl-5alpha-cholest-22E-en-3beta-ol, per unit mass total organic carbon; 24-Methylcholest-5-en-3beta-ol, per unit mass total organic carbon; 24-ethylcholest-5-en-3beta-ol, per unit mass total organic carbon; Phytoplankton biomarker Brassicasterol IP25 index; Phytoplankton biomarker Dinosterol IP25 index; Gravity corer; Box corer; MultiCorer; Giant box corer; Sequential multiple corer; Multicorer with television; Gas chromatography - Mass spectrometry GC-MS; Calculated; ARA2B; ARA3B; ARK-XIV/1a; ARK-XV/2; ARK-XVI/1; ARK-XVI/2; ARK-XVII/1; ARK-XVII/2; ARK-XVIII/1; ARK-XXVI/3; ARK-XXVII/3; ARK-XI/1; Araon; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Arctic; Arctic Ocean; Phytoplankton; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.819526; https://doi.pangaea.de/10.1594/PANGAEA.819526

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 ...