Abstract
Abstract. Water column data of carbon and carbon-relevant hydrographic and hydrochemical parameters from 188 cruises in the Arctic Mediterranean Seas, Atlantic and Southern Ocean have been retrieved and merged in a new data base: the CARINA (CARbon IN the Atlantic) Project. These data have gone through rigorous quality control (QC) procedures so as to improve the quality and consistency of the data as much as possible. Secondary quality control, which involved objective study of data in order to quantify systematic differences in the reported values, was performed for the pertinent parameters in the CARINA data base. Systematic biases in the data have been tentatively corrected in the data products. The products are three merged data files with measured, adjusted and interpolated data of all cruises for each of the three CARINA regions (Arctic Mediterranean Seas, Atlantic and Southern Ocean). Ninety-eight cruises were conducted in the "Atlantic" defined as the region south of the Greenland-Iceland-Scotland Ridge and north of about 30° S. Here we report the details of the secondary QC which was done on the total dissolved inorganic carbon (TCO2) data and the adjustments that were applied to yield the final data product in the Atlantic. Procedures of quality control – including crossover analysis between stations and inversion analysis of all crossover data – are briefly described. Adjustments were applied to TCO2 measurements for 17 of the cruises in the Atlantic Ocean region. With these adjustments, the CARINA data base is consistent both internally as well as with GLODAP data, an oceanographic data set based on the WOCE Hydrographic Program in the 1990s, and is now suitable for accurate assessments of, for example, regional oceanic carbon inventories, uptake rates and model validation.
Highlights
CARINA is a database containing inorganic carbon, alkalinity and relevant associated data such as temperature, salinity inorganic nutrients and oxygen from hydrographic cruises in the Arctic Mediterranean Seas, Atlantic and SouthernOceans
These files are in the World Ocean Circulation Experiment (WOCE) Hydrographic Program Office (WHPO) exchange format where the first lines consist of the condensed metadata
The TCO2 measurements are a key parameter in the CARINA effort such that we provide a short description of analysis methodologies
Summary
CARINA is a database containing inorganic carbon, alkalinity and relevant associated data such as temperature, salinity inorganic nutrients and oxygen from hydrographic cruises in the Arctic Mediterranean Seas, Atlantic and Southern. This report describes the consistency analysis of total dissolved inorganic carbon (TCO2) for the Atlantic Ocean part of the CARINA database. The CARINA database consists of two parts: the first part is the individual cruHisyedfirleosgcroanpthaiincinSgtaatlilotnhse ionrigCiAnaRl dINataAa−sAreTpLorted by the° mCoeraesCurrueismesent°tOetahmersCriuniscelus din°gS,taitnionms awnithyCcaalcsuelast,edthTeCOq2uality flags originally assigned to the data. These files are in the World Ocean Circulation Experiment (WOCE) Hydrographic Program Office (WHPO) exchange format where the first lines consist of the condensed metadata. Pierrot et al.: CARINA TCO2 data in the Atlantic Ocean Geographical Data Distribution in CARINA−ATL (Number of TCO Measurements)
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