title: Time variability of the north-western Mediterranean Sea pH over 1995-2011.
abstract: Factors controlling ocean acidification and its temporal variations were studied over the 1995-2011 period at the Dyfamed site at 10 m depth, in the North Mediterranean Sea. The results indicated a mean annual decrease of 0.003 ± 0.001 pH units on the seawater scale. The seasonal variability was characterized by a pH decrease during springtime and a strong pH increase in late fall. Anthropogenic CO2 (CANT) absorption by the ocean was the key driver of seawater acidification in this region, accounting for about 70% of the observed drop in pH, followed by water temperature (about 30%). The total inorganic carbon (CT) data showed a CT increase of 30.0 ± 1.0 μmol kg(-1) per decade. This decadal increase is mainly due to the CANT penetration (43.2 μmol kg(-1) per decade) in surface waters, which is mitigated for by relatively small opposing changes in CT due to physical and biological processes.
authors.affiliation: Centre de Recherches Océanologiques, 24 rue des pêcheurs, BP V 18, Abidjan, Côte d' Ivoire. Electronic address: markcelklindr@gmail.com.
authors.forename: Koffi
authors.initials: K
authors.lastname: Marcellin Yao
authors.affiliation: UPVD, IMAGES, 52 Avenue Paul Alduy, 66860, Perpignan, France.
authors.forename: Olivier
authors.initials: O
authors.lastname: Marcou
authors.affiliation: UPVD, IMAGES, 52 Avenue Paul Alduy, 66860, Perpignan, France.
authors.forename: Catherine
authors.initials: C
authors.lastname: Goyet
authors.affiliation: UPVD, IMAGES, 52 Avenue Paul Alduy, 66860, Perpignan, France.
authors.forename: Véronique
authors.initials: V
authors.lastname: Guglielmi
authors.affiliation: UPVD, IMAGES, 52 Avenue Paul Alduy, 66860, Perpignan, France.
authors.forename: Franck
authors.initials: F
authors.lastname: Touratier
authors.affiliation: UPVD, IMAGES, 52 Avenue Paul Alduy, 66860, Perpignan, France.
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Savy
mesh_terms: D002245:Carbon Dioxide / Q000378:metabolism; D004784:Environmental Monitoring; D006863:Hydrogen-Ion Concentration; D008522:Mediterranean Sea; D012621:Seasons; D012623:Seawater / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors
chemical_list: D002245:Carbon Dioxide
keywords: Anthropogenic CO(2); Mediterranean sea; Ocean acidification