February 1st to 5th 2016
Olhão, Portugal
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What is the acidification level in the Mediterranean Sea?

Scientific Exhibition
Future Oceans
Wednesday, February 3, 2016 -
18:30 to 20:00

Hassoun, A.E.R. 1 Gemayel, E. 2 Krasakopoulou, E. 3 Goyet, C. 4 Abboud-Abi Saab, M. 5 Guglielmi, V. 6 Touratier, F. 7 Falco, C. 8

1National Council for Scientific Research, National Center for Marine Sciences,P.O. Box 534, Batroun, Lebanon
2National Council for Scientific Research, National Center for Marine Sciences,P.O. Box 534, Batroun, Lebanon
3University of the Aegean, Department of Marine Sciences, University Hill, Mytilene 81100,Greece
4IMAGES_ESPACE-DEV, Université de Perpignan Via Domitia, 52 avenue Paul Alduy, 66860 Perpignan Cedex 9, France and ESPACE-DEV, UG
5National Council for Scientific Research, National Center for Marine Sciences,P.O. Box 534, Batroun, Lebanon
6IMAGES_ESPACE-DEV, Université de Perpignan Via Domitia, 52 avenue Paul Alduy, 66860 Perpignan Cedex 9, France and ESPACE-DEV, UG
7IMAGES_ESPACE-DEV, Université de Perpignan Via Domitia, 52 avenue Paul Alduy, 66860 Perpignan Cedex 9, France and ESPACE-DEV, UG
8IMAGES_ESPACE-DEV, Université de Perpignan Via Domitia, 52 avenue Paul Alduy, 66860 Perpignan Cedex 9, France and ESPACE-DEV, UG

Using the biogeochemical data of the May 2013 MedSeA cruise, we were able to estimate the anthropogenic CO2 (CANT) concentrations and the acidification levels (?pH=pH 2013–pHpre-industrial) in the Mediterranean Sea. Applying the TrOCA approach, our results show that the most invaded waters (>60 µmol kg -1?1) are those of the intermediate and deep layers in the Alboran, Liguro- and Algero-Provencal Sub-basins in the Western basin, and in the Adriatic Sub-basin in the Eastern basin. This study shows that the hydrography in the Mediterranean Sea impacts both CANT concentrations and acidification levels in the intermediate and deep layers. It also indicates that the entire Mediterranean Sea is still highly saturated in calcium carbonate minerals. The acidification ranges between ?0.055 and ?0.156 pH unit, which reflects the fact that all Mediterranean Sea waters are already strongly influenced by the ocean acidification phenomena.
keywords: 
Carbonate System, Acidification, Anthropogenic Carbon, Mediterranean Sea

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