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Observations along the southwestern Atlantic WOCE A17 line made during the Dutch GEOTRACES-NL programme (2010-2011) were compared with historical data from 1994 to quantify the changes in the anthropogenic component of the total pool of dissolved inorganic carbon (ΔCant). Application of the extended multi-linear regression (eMLR) method shows that the ΔCant from 1994 to 2011 has largely remained confined to the upper 1000 dbar. The greatest changes occur in the upper 200 dbar in the Subantarctic Zone (SAZ), where a maximum increase of 37 μmol kg-1 is found. South Atlantic Central Water (SACW) experienced the highest rate of increase in Cant, at 0.99 ± 0.14 µmol kg-1 yr-1, resulting in a maximum rate of decrease in pH of 0.0016 yr-1. The highest rates of acidification relative to ΔCant, however, were found in Subantarctic Mode Water (SAMW) and Antarctic Intermediate Water (AAIW). The low buffering capacity of SAMW and AAIW combined with their relatively high rates of Cant, increase of 0.53 ± 0.11 and 0.36 ± 0.06 μmol kg-1 yr-1, respectively, has lead to rapid acidification in the SAZ, and will continue to do so whilst simultaneously reducing the chemical buffering capacity of this significant CO2 sink. [ABSTRACT FROM AUTHOR]

The article discusses the CARbon IN the Atlantic (CARINA) Project which details the total dissolved inorganic carbon data parameters in the Atlantic Ocean. It states that the water column data have gone through quality control (QC) procedures for the assurance of the highest possible quality and consistency. Moreover, it talks about the secondary QC to quantify systemic differences in the data done on the total dissolved inorganic carbon data and data product adjustments.

The article offers information on the potential of hydrogen (pH) data scale unification and cruise adjustments by the CARbon IN the Atlantic (CARINA). It presents the details of the secondary quality control of pH in the CARINA database and the scale unification to Sea-Water Scale at 25 degrees Celsius. It describes the procedures of quality control, including crossover analysis among cruises in the CARINA dataset.

The article focuses on the introduction and overview of the CARbon IN the Atlantic (CARINA) data synthesis project. It highlights the original goal of the CARINA data synthesis project was to create a merged calibrated data set from open ocean subsurface measurements by European scientist that would be generally useful for biogeochemical investigations in the North Atlantic. It reports the next planned step for is to merge CARINA and Global Ocean Data Analysis Project (GLODAP).

The article offers information on the use of the database CARbon IN the Atlantic (CARINA) to collect water column data of carbon and carbon-relevant hydrographic and hydrochemical parameters in the Atlantic Ocean. It presents an overview of the Atlantic Ocean synthesis of the CARINA data and the adjustments that were applied to the data product. It briefly describes the procedures of quality control including crossover analysis between stations, and inversion analysis of all crossover data.

The article presents an overview of the Atlantic Ocean synthesis of the Carbon In the Atlantic (CARINA) and the adjustments being applied to the data product. It notes the use of crossover analysis to get the estimated internal accuracy of salinity data which is 4.1 parts per million. It infers that through the consistency of the internal adjustments, the CARINA database is now fit for accurate assessments in terms of oceanic carbon inventories, uptake rates and model validation.