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Mercredi 27 novembre - Using ocean tracers to constrain water mass transports and ventilation

Par semsou — Dernière modification 12/11/2013 10:32
Quand ? Le 27/11/2013,
de 11:00 à 12:00
Où ? salle Coriolis
Participants Reiner Schlitzer, Alfred Wegener Institute, Bremerhaven, Germany
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Reiner Schlitzer, Alfred Wegener Institute, Bremerhaven, Germany

 

Titre: Using ocean tracers to constrain water mass transports and ventilation

 

Abstract:

Knowledge of the strength of ocean ventilation as well as the formation and spreading rates of intermediate and deep water masses is crucial for an understanding of the redistribution of matter in the ocean. This is particularly important for the quantification of uptake and storage of anthropogenic carbon in the world ocean as well as for the cycling of nutrients and their replenishment in the sun-lit surface ocean. In this talk I present a multi-tracer data assimilation model that exploits chlorofluorocarbon (CFC) and radiocarbon (14C) data in addition to a large number of hydrographic parameter and estimates water mass formation and spreading rates. In a second part of the talk I use this “calibrated” model to simulate distributions of 230Th and 231Pa and address the question whether data of these isotopes can be used to infer paleo transport rates.

 

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