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Assessing the internal consistency of the CARINA data base in the Pacific sector of the Southern Ocean

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Sabine, C. L. , Hoppema, M. , Key, R. M. , Tilbrook, B. , Van Heuven, S. , Lo Monaco, C. , Metzl, N. , Ishii, M. , Murata, A. and Musielewicz, S. (2010): Assessing the internal consistency of the CARINA data base in the Pacific sector of the Southern Ocean , Earth System Science Data, 2 , pp. 195-204 . doi: 10.5194/essd-2-195-2010
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The CARINA project is aimed at gathering and providing secondary quality control checks on carbon and carbon-relevant hydrographic and geochemical data from cruises all across the Atlantic, Arctic and Southern Ocean. In total the project gathered 188 cruises that were not previously available to the public. Of these 188 cruises, 37 are part of the Southern Ocean. Parameters from the Southern Ocean cruises, including total carbon dioxide (TCO2), total alkalinity, oxygen, nitrate, phosphate and silicate, were examined for cruise-to-cruise consistency. pH and chlorofluorocarbons (CFCs) are also part of the data base, but are not discussed here. This paper focuses on the quality control of the Southern Ocean data from the Pacific sector which consisted of 29 cruises of which 17 were included in a previous synthesis called GLODAP, 11 were new cruises from the CARINA dataset, and one cruise was included in GLODAP but was updated with new data and therefore also included in CARINA. The Pacific sector quality control procedures included crossover analysis between stations and inversion analysis of all crossover data. The GLODAP data were included into the analysis as reference cruises but without applying the GLODAP recommended adjustments so the corrections could be independently verified. The outcome of this effort is an internally consistent, high-quality carbon data set for all cruises, including the reference cruises.

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