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Discussion papers | Copyright
https://doi.org/10.5194/gmd-2017-251
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.

Model description paper 16 Nov 2017

Model description paper | 16 Nov 2017

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This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).

FAME (v1.0): a simple module to simulate the effect of planktonic foraminifer species-specific habitat on their oxygen isotopic content

Didier M. Roche1,2, Claire Waelbroeck1, Brett Metcalfe1,2, and Thibaut Caley3 Didier M. Roche et al.
  • 1Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
  • 2Vrije Universiteit Amsterdam, Faculty of Earth and Life Sciences, Cluster Earth and Climate, de Boelelaan 1085, 1081HV Amsterdam, The Netherlands
  • 3EPOC, UMR 5805, CNRS, University Bordeaux, Pessac, France

Abstract. The oxygen-18 signal recorded in fossil planktonic foraminifer shells has been used for over 50 years in many geoscience applications. However, different planktonic foraminifer species generally yield distinct oxygen-18 signals, as a consequence of their specific living habitats in the water column and along the year. This complexity is usually not taken into account in data – model integration studies. To overcome this shortcoming, we developed the FAME (Foraminifers As Modeled Entities) module. The module predicts the presence or absence of commonly used planktonic foraminifers, and their oxygen-18 values. It is only forced by hydrographic data and uses a very limited number of parameters, almost all derived from culture experiments. FAME performance is evaluated using MARGO Late Holocene planktonic foraminifer calcite oxygen-18 and abundances data sets. The application of FAME to a simple cooling scenario demonstrates its utility to predict changes in planktonic foraminifer oxygen-18 in response to changing climatic conditions.

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The oxygen-18 signal recorded in fossil planktonic foraminifers has been used for over 50 years in many geoscience applications. However, different planktonic foraminifer species from the same sediment core generally yield distinct oxygen-18 signals, as a consequence of their specific living habitat in the water column and along the year. To explicitly take into account this variability for five common planktonic species, we developed the portable module FAME (Foraminifers As Modeled Entities).
The oxygen-18 signal recorded in fossil planktonic foraminifers has been used for over 50 years...
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