CARINA alkalinity data in the Atlantic Ocean

[摘要] Data on carbon and carbon-relevant hydrographic and hydrochemical parametersfrom previously non-publicly available cruise data sets in the Arctic,Atlantic and Southern Ocean have been retrieved and merged to a newdatabase: CARINA (CARbon IN the Atlantic).

These data have gone through rigorous quality control (QC) procedures toassure the highest possible quality and consistency. The data for most ofthe measured parameters in the CARINA data base were objectively examined inorder to quantify systematic differences in the reported values, i.e. secondary quality control. Systematic biases found in the data have beencorrected in the data products, i.e. three merged data files with measured,calculated and interpolated data for each of the three CARINA regions;Arctic, Atlantic and Southern Ocean. Out of a total of 188 cruise entries inthe CARINA database, 98 were conducted in the Atlantic Ocean and of these,75 cruises report alkalinity values.

Here we present details of the secondary QC on alkalinity for the AtlanticOcean part of CARINA. Procedures of quality control, including crossoveranalysis between cruises and inversion analysis of all crossover data arebriefly described. Adjustments were applied to the alkalinity values for 16of the cruises in the Atlantic Ocean region. With these adjustments theCARINA database is consistent both internally as well as with GLODAP data,an oceanographic data set based on the World Hydrographic Program in the1990s. Based on our analysis we estimate the internal accuracy of theCARINA-ATL alkalinity data to be 3.3 μmol kg⁻¹. The CARINAdata are now suitable for accurate assessments of, for example, oceaniccarbon inventories and uptake rates and for model validation.

[学科分类] 天文学(综合)