Konsekvenser av CO2-opptak i havet
Richard Bellerby fra Bjerknes Centre for Climate Research ved Universitetet i Bergen holder det første foredraget Akademiets klimaserie i høst under tittelen "Consequences of C02 uptake in the oceans." Kommentator: Knut Bjørlykke, professor i geologi, Universitetet i Oslo. Se kort sammendrag under. Møtet, som er åpent for alle interesserte, holdes på Det Norske Videnskaps-Akademi, Drammenveien 78, torsdag 28. oktober kl 18.00 - 20.00. Møtet ledes av professor Nils Roll-Hansen.
Consequences of CO2 uptake in the oceans
Consequent to the increase in the atmospheric load of carbon dioxide (CO2), due in large to anthropogenic carbon release, there has been an increase in the oceanic carbon reservoir. At the air-sea interface, the productive, euphotic surface ocean is a transient buffer in the process of ocean-atmosphere CO2 equilibrium, a process retarded by the slow mixing of the surface waters with the intermediate and deep ocean. As such, the greatest changes to the CO2 system are occurring in the surface waters. This build up of CO2 is already altering the carbonate chemistry of the oceans and projections on decadal to centennial timescales point to changes in seawater pH and carbonate speciation that may have ramifications for the success of organisms or whole marine ecosystems. This presentation will introduce the concept of ocean acidification, describe the present rate of change of the marine carbonate system and its regionality and discuss scenarios of change over the next decades. I will show some examples of marine organismal and ecosystem responses to ocean acidification.