Anthropogenic CO2 and CFCs in the North Atlantic Ocean - a comparison of man-made tracers.

Körtzinger, Arne , Rhein, Monika and Mintrop, Ludger (1999) Anthropogenic CO2 and CFCs in the North Atlantic Ocean - a comparison of man-made tracers. Open Access Geophysical Research Letters, 26 . pp. 2065-2068. DOI 10.1029/1999GL900432.

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We compare estimates of the anthropogenic CO2 content of seawater samples from the subpolar North Atlantic Ocean calculated on the basis of a back-calculation technique with measurements of the chlorofluorocarbon CFC-11. Estimated anthropogenic CO2 concentrations are in the range 10–80 µmol kg-1, while CFC-11 concentrations cover the full range from below detection limit to > 5 pmol kg-1 in waters at atmospheric equilibrium. The majority of the data points show a linear correlation between anthropogenic CO2 concentrations and CFC-11 saturation, which can only be explained by the strongly advective nature of the North Atlantic Ocean. Only deep eastern basin samples deviate from this general observation in that they show still significant concentrations of anthropogenic CO2 where CFC-11 is no longer detectable. In order to remove the influence of the Revelle factor reflected in the anthropogenic CO2 concentrations we have calculated 'excess' pCO2, showing an even tighter linear correlation with atmospheric equilibrium concentrations of CFC-11.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/1999GL900432
ISSN: 0094-8276
Date Deposited: 18 Feb 2008 17:24
Last Modified: 13 Feb 2018 14:04

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