Projektbeschreibung Marine Isotope Stage 11 in the - Gepris

Marine Isotope Stage 11 in the Pacific Southern Ocean; a coccolithosphore
perspective
Antragstellerin:
Dr. Pilar Mariem Saavedra-Pellitero
Universität Bremen
Fachbereich 05: Geowissenschaften
Fachgebiet Sedimentologie - Paläozeanographie
Klagenfurter Straße
28359 Bremen
Telefon: +49 421 21865201
E-Mail: msaavedr uni-bremen.de
Fachliche Zuordnung
Förderung
Geologie, Ingenieurgeologie, Paläontologie
Förderung seit 2013
Projektbeschreibung
This project aims to get new insights into the late Pleistocene interglacial Marine Isotope Stage (MIS 11) in the Pacific
sector of the Southern Ocean, where little information is available. MIS 11 (between ca. 424 and 374 kyr) is a unique
exceptionally long interglacial period often regarded as an analogue of what the Holocene would have been without
any anthropogenic interference. Thick white layers with high carbonate content have been observed at high southern
latitudes during this time interval. We intend to elaborate an integrated, multi-parameter record of coccolithophore
data on MIS 11 sediments retrieved during R/V Polarstern ANT XXVI/2 expedition in the polar South Pacific (cores
PS75/091, PS75/079, PS75/076, PS75/059, PS75/047 and PS75/046). In order to characterize the coccolithophore
palaeoproductivity two independent proxies will be used: the Nannofossil Accumulation Rate (NAR) and the coccolith
Sr/Ca ratio measured in different coccolith size fractions. In addition, the carbonate contribution of the main species
Gephyrocapsa caribbeanica to the total pelagic carbonate production will be assessed and the carbonate dissolution
quantified. All the information retrieved will allow us to evaluate if the coccolithophores modified the equilibrium of the
inorganic carbon system during MIS 11 in the Pacific sector Southern Ocean.
DFG-Verfahren
Teilprojekt zu
Internationaler Bezug
Beteiligte Person:
Infrastruktur-Schwerpunktprogramme
SPP 1158: Bereich Infrastruktur - Antarktisforschung mit
vergleichenden Untersuchungen in arktischen Eisgebieten
Spanien
Dr. Karl-Heinz Baumann, Ph.D.; Professor Dr. José-Abel
Flores; Dr. Rainer Gersonde
GEPRIS ist ein Projekt der Deutschen Forschungsgemeinschaft.
Sie erreichen GEPRIS unter http://www.dfg.de/gepris
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