JpGU-AGU Joint Meeting 2017

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[EE] Oral

B (Biogeosciences) » B-PT Paleontology

[B-PT03] [EE] Biomineralization and the Geochemistry of Proxies -Field ecology, Laboratory culture and Paleo

Sat. May 20, 2017 1:45 PM - 3:15 PM 201B (International Conference Hall 2F)

convener:Takashi Toyofuku(Japan Agency for Marine-Earth Science and Technology (JAMSTEC)), Hiroshi Kitazato(University Reform Office, Tokyo University of Marine Science and Technology (TUMSAT)), Jelle Bijma(Alfred-Wegener-Institut Helmholtz-Zentrum f?r Polar- und Meeresforschung), Chairperson:Takashi Toyofuku(Japan Agency for Marine-Earth Science and Technology (JAMSTEC))

In order to reconstruct the Earth climate system, marine paleoclimatologists resort to transfer functions or geochemical proxies, which are produced or affected by organisms. The relationships used for reconstructions are generally based on field calibrations or derived from laboratory experiments. The danger of these so called empirical relationships is that they maybe valid only within the restricted parameter space of their calibration. Application of proxy relationships to very different environmental settings (e.g. high vs. low latitude or glacial vs. interglacial) requires a mechanistic understanding of these relationships. Much progress can be expected by a better understanding of the biocalcification mechanisms and the incorporation of proxy signals.

In this session we failitate contributions related to the biocalcification, calibration and validation of marine proxies from field study, laboratory culture experiment and paleo environmental reconstruction.

1:45 PM - 2:00 PM

[BPT03-01] Cold seeps in the Sea of Marmara: a refuge for “extremophile” foraminifera?

*Christophe Fontanier1, Delphine Dissard2, Livio Ruffine3, Emmanuel Ponzevera3, Ewan Pelleter3, François Baudin4, Angélique Roubi3, Sandrine Chéron3, Audrey Boissier3, Nicolas Gayet5, Sylvain Bermell-Fleury3, Vivien Guyader3, Françoise Lesongeur5, Florence Savignac4 (1.EPOC Laboratory (University of Bordeaux, France), Ifremer Géosciences Marines (Plouzané, France), FORAM Study Group (Villevêque, France) & University of Angers (France), 2.IRD-Sorbonne Universités, UPMC, Univ Paris 06-CNRS-MNHN, LOCEAN Laboratory (Paris, France), 3.Ifremer Géosciences Marines (Plouzané, France), 4.ISTeP-Sorbonne Universités, UPMC, Univ Paris 06, UMR 7193 (Paris France), 5.Ifremer Etude des Ecosystèmes Profonds (Plouzané, France))

2:00 PM - 2:15 PM

[BPT03-02] A more robust salinity proxy: towards a mechanistic understanding of sodium incorporation in foraminiferal calcite

*Esmee Geerken1, Anne Roepert2, Lubos Polerecky2, Lennart de Nooijer1, Gert-Jan Reichart1,2 (1.Royal Netherlands Institute for Sea Research, the Netherlands, department of Ocean Systems, and Utrecht University, Landsdiep 4, 1797 SZ ‘t Horntje, The Netherlands, 2.Utrecht University, Faculty of Geosciences, 3584 CD Utrecht, The Netherlands.)

2:15 PM - 2:30 PM

[BPT03-03] Investigation of δ26Mg in large benthic foraminifera as a temperature proxy

*Ayumi Maeda1,2, Toshihiro Yoshimura2, Daisuke Araoka4,3, Atsushi Suzuki4,3, Kazuhiko Fujita3,4, Takashi Toyofuku5, Naohiko Ohkouchi5, Hodaka Kawahata1,2 (1.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 2.Atmosphere and Ocean Research Institute, The University of Tokyo, 3.National Institute of Advanced Industrial Science and Technology, 4.Department of Physics and Earth Sciences, Faculty of Science, University of the Ryukyus, 5.Japan Agency for Marine-Earth Science and Technology)

Discussion (3:10 PM - 3:15 PM)

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