Organic paleotemperature proxies in suspended particulate matter and sediment core tops from continatal slope off Newfoundland during Maria S. Merian Expedition MSM39 in June 2014 ...

• Main Author: Schukies, Julian
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2018
• Subjects: Alfred Wegener Institute; Newfoundland; north atlantic current; North Atlantic; Northwest Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.894308; https://doi.pangaea.de/10.1594/PANGAEA.894308

TEX86 (tetraether index of 86 carbon atoms) is an organic paleotemperatureproxy based on the relative abundances of thaumarcheal isoprenoid glycerol dialkyl glycerol tetraethers (iGDGTs). The calibration is based on global core top sediments. The global core top calibrations of TEX86 are often not reliable for reconstructions of watertemperatures in regions with distinct hydrographic conditions. In the area of the continental edge of Newfoundland (Northwest Atlantic), hydrographic conditions are mainly determined by the Labrador- and the North Atlantic Current. Thus, the region differs from the global ocean. In this study the accuracy of temperature estimations of TEX86 was tested at the realm of the continental edge off Newfoundland. For this purpose, GDGT distribution in suspended particulate matter of water surface and core top sediments was analysed. Based on the GDGT composition, the influence of the regional environmental factors on the TEX86 proxy was investigated. Based on TEX-signals of the samples, ... : Supplement to: Schukies, Julian (2018): Prüfung der Anwendbarkeit des TEX86 in Proben partikulären organischen Materials und Oberflächensedimenten im Bereich des Zusammentreffens von Nordatlantik- und Labradorstrom am Kontinentalhang vor Neufundland, NW Atlantik. Master thesis, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany (unpublished) ...