A synthesis of SNAPO-CO2 ocean total alkalinity and total dissolved inorganic carbon measurements from 1993 to 2022 - Institut Pierre-Simon Laplace Access content directly
Journal Articles Earth System Science Data Year : 2023

A synthesis of SNAPO-CO2 ocean total alkalinity and total dissolved inorganic carbon measurements from 1993 to 2022

Nathalie Lefèvre
Anne Petrenko
Thibaut Wagener

Abstract

Since 2004, the Service facility SNAPO-CO2 (Service National d’Analyse des Paramètres Océaniques du CO2) housed by the LOCEAN laboratory (Paris, France) has been in charge for the analysis of Total Alkalinity (AT) and Total dissolved inorganic carbon (CT) of seawater samples on a series of cruises or ships of opportunity conducted in different regions in the frame of French projects. More than 44000 observations are synthetized in this work. Sampling was performed either from CTD-Rosette casts (Niskin bottles) or collected from the ship’s seawater supply (intake at about 5m depth). After completion of each cruise, discrete samples were returned back at LOCEAN laboratory and stored in a dark room at 4 °C before analysis generally within 2-3 months after sampling (sometimes within a week). AT and CT were analyzed simultaneously by potentiometric titration using a closed cell (Edmond, 1970). Certified Reference Materials (CRMs) provided by Pr. A. Dickson (Scripps Institution of Oceanography, San Diego, USA) were used to calibrate the measurements. The same instrumentation was used for underway measurements during OISO cruises (https://doi.org/10.18142/228) and OISO AT-CT data for 1998-2018 in the South Indian Ocean added in this synthesis. The synthesis is organized in two files (one for Global ocean and the Coastal Zones, one for the Mediterranean Sea) with the same format: Cruise name, Ship name, day, month, year, hour, minute, second, latitude, longitude, depth, AT (µmol/kg), Flag-AT, CT (µmol/kg), Flag-CT, Temperature (°C), Flag-Temp, Salinity (PSU), Flag-Salinity, nsample/cruise, nsample on file, sampling method.
Fichier principal
Vignette du fichier
essd-2023-308-manuscript-version3 (2).pdf (2.44 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-04292340 , version 1 (04-09-2023)
hal-04292340 , version 2 (17-11-2023)

Identifiers

Cite

Nicolas Metzl, Jonathan Fin, Claire Lo Monaco, Guillaume Bourdin, Samir Alliouane, et al.. A synthesis of SNAPO-CO2 ocean total alkalinity and total dissolved inorganic carbon measurements from 1993 to 2022. Earth System Science Data, inPress, ⟨10.5194/essd-2023-308⟩. ⟨hal-04292340v2⟩
246 View
47 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More