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Bernardello, R. ., University of Pennsylvania-Earth and Environmental Science, Philadelphia, USA, braf@sas.upenn.edu
Marinov, I. ., University of Pennsylvania-Earth and Environmental Science, Philadelphia, USA, imarinov@sas.upenn.edu
Sarmiento, J. L., Princeton University-Atmospheric and Oceanic Sciences, Princeton, USA, jls@princeton.edu

RESPONSE OF THE OCEAN CARBON PUMPS TO CHANGES IN OCEAN CIRCULATION IN 21ST CENTURY CLIMATE CHANGE SIMULATIONS

Under increasing atmospheric CO2 concentrations the changing Earth's radiative balance will influence the atmospheric and oceanic circulation. One of the consequences will be a modification of the ability of the ocean to absorb and store CO2. To a first degree of approximation the ocean's carbon uptake can be separated between solubility-driven and biologically-driven pumps. The separate impact of the changing ocean circulation on these two pumps is still unclear though a partial compensation between opposite responses is expected. We design a suite of model experiments to quantify these responses analyzing a preindustrial steady state and an evolving state with atmospheric carbon concentrations rising according to historical (1880-2009) and projected IPCC scenarios. All experiments are carried out in CM2Mc, a coarse version of one of the climate models (the GFDL CM2) used in the IPCC Fourth Assessment report. The ocean biogeochemical component is solved by the Biology-Light-Iron-Nutrients-Gas (BLING) model which allow the separation between biological and solubility contributions to dissolved inorganic carbon.

Poster presentation

Session #:003
Date: 2/23/2012
Time: 08:00 - 10:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: B0748