Objective
TO PREDICT RELIABLY FUTURE ATMOSPHERIC CO2 LEVELS ONE MUST THROUGHLY UNDERSTAND THE DYNAMICS OF THE GAS EXCHANGE BETEWEEN AIR AND SEA AS A FUNCTION OF DYNAMICAL PARAMETERS SUCH AS TEMPERATURE, SEA-STATE, WIND SPEED, AND CHEMICAL PARAMETERS, MAINLY THE SEA WATER CHEMISTRY.
THE FLUX OF CO2 BETWEEN THE ATMOSPHERE AND THE OCEAN IS ESTIMATED THE PRODUCT OF ITS CONCENTRATION DIFFERENCE ACROSS THE INTERFACE AND THE TRANSFER VELOCITY WHICH DEPENDS ON THE VARIOUS PARAMETERS QUOTED ABOVE. NO QUANTITATIVE BASIS EXISTS TO CALCULATE THE VALUE OF THE TRANSFER VELOCITY COEFFICIENT AND ITS DEPENDENCY ON THE DYNAMICAL AND CHEMICAL QUANTITIES DESCRIBING THE AIR-SEA INTERFACE.
OUR AIM IN THE PRESENT PROPOSAL IS TO INVESTIGATE THE MECHANISMS OF THE GAS EXCHANGE AT THE AIR-WATER INTERFACE BY RUNNING EXPERIMENTS IN A WIND TUNNEL.
A WIND-WATER FACILITY WHEREIN THE SMALL-SCALE DYNAMICAL AND THERMODYNAMICAL AIR-SEA EXCHANGE PROCESSES CAN BE SIMULATED EXISTS AT THE INSTITUT DE MECANIQUE STATISTIQUE DE LA TURBULANCE AT MARSEILLE. WE WILL MEASURE THE CO2 EXCHANGE RATE IN THIS FACILITY WORKING WITH SEA WATER.
A MORE DETAILED SCHEME AND TIME-TABLE FOR THE PROPOSED RESEARCH ARE THE FOLLOWING : - EXPERIMENTS AT I.M.S.T. WITH RARE GASES (ARGON, HELIUM) AND SLIGHTLY ACTIVE GASES AS N2O WITH SEA-WATER. THIS STUDY IS PRESENTLY BEING ACHIEVED WITH FRESH WATER.
- SETTING OF THE ANALYTICAL PROCEDURE TO MEASURE CO2 IN THES GAS AND THE LIQUID PHASE DIRECTLY IN THE WIND TUNNEL BY GAS CHROMATOGRAPHY. EXPERIMENTS IN THE WIND TUNNEL WITH CO2 AND SALT WATER WILL BE PERFORMED.
- SOME EXPEIMENTS WILL BE RUN USING ISOTOPICALLY LABELLED CO2 (13CO2) IN ORDER TO PRECISE THE RELATIVE PARTS OF THE PHYSICAL AND CHEMICAL KINETICS OCCURING WITH SALT WATER.
- MODELING THE FLUX OF CO2 BETWEEN THE ATMOSPHERE AND THE SEA AT THE WORLD OCEAN SCALE, TAKING INTO ACCOUNT THE SPATIAL AND TEMPORAL CHANGES AT THIS SCALE.
Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Funding Scheme
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Coordinator
91190 Gif-sur-Yvette
France
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