High anthropogenic carbon content in the eastern Mediterranean.

Schneider, Anke, Tanhua, Toste , Körtzinger, Arne and Wallace, Douglas W.R. (2010) High anthropogenic carbon content in the eastern Mediterranean. Open Access Journal of Geophysical Research: Oceans, 115 (C12). DOI 10.1029/2010JC006171.

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Abstract

This work presents data of dichlorodifluoromethane (CFC-12), dissolved inorganic carbon and total alkalinity from a cruise to the Mediterranean Sea during October–November 2001, with the main focus on the CFC-12 data and on the eastern basin. Using the transit time distribution method, the anthropogenic carbon concentrations in the basin were estimated. Results were cross-checked with a back-calculation technique. The entire water column of the Mediterranean Sea contains anthropogenic CO2, with minimum concentrations of 20.5 μmol kg−1 (error range: 16.9–27.1 μmol kg−1) in the most eastern part of the basin at intermediate depths, where the waters' mean age is >130 yr. Column inventories of up to 154 mol m−2 (132–179 mol m−2) are found and a total inventory of 1.7 Pg (1.3–2.1 Pg) of anthropogenic carbon in the Mediterranean Sea was estimated. There is a net flux of 38 Tg yr−1 (30–47 Tg yr−1) of dissolved inorganic carbon through the Strait of Gibraltar into the Atlantic Ocean and an opposite net flux of 3.5 Tg yr−1 (−1.8–9.2 Tg yr−1) of anthropogenic carbon into the Mediterranean Sea.

Document Type: Article
Keywords: Marine chemistry; carbon, Mediterranean, anthropogenic
Research affiliation: OceanRep > The Future Ocean - Cluster of Excellence > FO-R05
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2010JC006171
ISSN: 2169-9275
Projects: Future Ocean, CARBOOCEAN
Expeditions/Models/Experiments:
Date Deposited: 04 Jan 2011 11:00
Last Modified: 23 Sep 2019 17:59
URI: http://oceanrep.geomar.de/id/eprint/10676

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