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

• Published in: Earth System Science Data
• Main Authors: Lo Monaco, Claire, Álvarez, M., Key, Robert M., Lin, X., Tanhua, Toste, Tilbrook, Bronte, Bakker, Dorothee C. E., Van Heuven, Steven M. A. C., Hoppema, Mario, Metzl, Nicolas, Ríos, Aida F., Sabine, Christopher L., Velo, Anton
• Other Authors: Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut Mediterrani d'Estudis Avancats (IMEDEA), Consejo Superior de Investigaciones Científicas Madrid (CSIC)-Universidad de las Islas Baleares (UIB), Princeton University, Leibniz-Institut für Meereswissenschaften (IFM-GEOMAR), Commonwealth Scientific and Industrial Research Organisation Canberra (CSIRO), School of Environmental Sciences Norwich, University of East Anglia Norwich (UEA), University of Groningen Groningen, Alfred-Wegener-Institut Bremerhaven, Instituto de Investigaciones Marinas, NOAA Pacific Marine Environmental Laboratory Seattle (PMEL), National Oceanic and Atmospheric Administration (NOAA), Consejo Superior de Investigaciones Científicas Madrid (CSIC), The publication of this article is financed by CNRS-INSU
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2010
• Subjects: [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography; Arctic; Southern Ocean; Arctic Ocean; Indian; Nordic Seas; North Atlantic
• Online Access: https://hal.archives-ouvertes.fr/hal-01205900; https://hal.archives-ouvertes.fr/hal-01205900/document; https://hal.archives-ouvertes.fr/hal-01205900/file/essd-2-51-2010.pdf; https://doi.org/10.5194/essd-2-51-2010

International audience 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 (TCO 2), 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 (GLO-DAP) 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 <220 km). The corrections suggested by the inversion were allowed to vary within a fixed envelope, thus accounting for ocean interior variability. The adjustments applied to CARINA data and those recommended for GLODAP data, in order to obtain a consistent merged dataset, are presented and discussed. The final outcome of this effort is a new quality controlled data base for TCO 2 and other properties of the carbon system that can now be used to investigate the natural variability or stability of ocean chemistry and the accumulation of anthropogenic carbon. This data product also offers an important new synthesis of seasonal to decadal observations to validate ocean biogeochemical models in a region where available historical data were very sparse.