The role of the ocean in global change
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The role of the ocean in global change
J.-P. VanderborghtULB, Océanographie Chimique et Géochimie des
Eaux (ULB-OCEAN)
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Contributors• Royal Museum for Central Africa – Geology and
Mineralogy• Royal Belgian Institute of Natural Science – MUMM• UA – Micro- and Trace Analysis Centre• UGent – Mariene Biologie• ULB – Ecologie des Systèmes Aquatiques• ULB – Laboratoire d’Océanographie Chimique et
Géochimie des Eaux• ULg – Laboratoire de Physique Atmosphérique et
Planétaire• ULg – Unité d’Océanographie Chimique• VUB – Laboratorium voor Analytische Scheikunde
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Context
• During recent geological time, the ocean was a source of CO2 for the atmosphere.
• Following the modern increase of atmospheric CO2, the ocean acts now as a sink, with a net uptake of 2 to 3 gigatons of C per year.
• ~ 30 % of the total CO2 emitted by man has been transfered to the ocean.
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Recent geological time scale
ATMOSPHERE
LAND OCEAN
burial: 280
erosionrivers
Corg 400
HCO3- : 400
280
uplift
520 520
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ATMOSPHERE
LAND OCEAN
accumulation
3300 200
Anthropogenic fluxes
uptake2000 800
emissions7100 1100 1800 2000
???
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Some key contributions
• Behaviour of nutrients in estuarine and coastal systems (N – P – Si )
• Direct measurement / modeling of CO2 exchange at the sea surface
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• Evaluation of C fluxes in estuaries, coastal zones and the continental shelf, in the water column and in the sediments
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• Evaluation of organic carbon fluxes along the continental margin and in the Southern ocean
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• Role of siliceous and calcareous organisms
• Assessment of iron fertilisation in the Southern ocean
• Development of new tools: databases, indicators, models
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• At the individual level: International Scientific Committees and Research Institutes, etc.
• At the institutional level:the role of MUMM at the interface between science and the society.
Belgian marine research: a long tradition of collaboration between
scientists and policy preparing fora
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