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Assessing the internal consistency of the CARINA database in the Indian sector of the Southern Ocean

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Author(s): C. Lo Monaco | M. Álvarez | R. M. Key | X. Lin | T. Tanhua | B. Tilbrook | D. C. E. Bakker | S. van Heuven | M. Hoppema | N. Metzl | A. F. Ríos | C. L. Sabine | A. Velo

Journal: Earth System Science Data
ISSN 1866-3508

Volume: 2;
Issue: 1;
Start page: 51;
Date: 2010;
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ABSTRACT
Carbon and carbon-relevant hydrographic and hydrochemical ancillary data from previously not publicly available cruises were retrieved and recently merged to a new data base, CARINA (CARbon IN the Atlantic). The initial North Atlantic project, an international effort for ocean carbon synthesis, was extended to include the Arctic Mediterranean Seas (Arctic Ocean and Nordic Seas) and all three sectors of the Southern Ocean. Of a total of 188 cruises, 37 cruises are part of the Southern Ocean. The present work focuses on data collected in the Indian sector (20° S–70° S; 30° E–150° E). The Southern Indian Ocean dataset covers the period 1992–2004 and includes seasonal repeated observations. Parameters including salinity, dissolved inorganic carbon (TCO2), total alkalinity (TA), oxygen, nitrate, phosphate and silicate were examined for cruise-to-cruise and overall consistency. In addition, data from an existing, quality controlled data base (GLODAP) were introduced in the CARINA analysis to improve data coverage in the Southern Ocean. A global inversion was performed to synthesize the information deduced from objective comparisons of deep measurements (>1500 m) at nearby stations (generally
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