Macovei, Vlad Alexandru; Listing, Oliver; Kinski, Nadja; Voynova, Yoana G (2025): Surface seawater pCO2 observations in the Atlantic Ocean measured with a membrane-based sensor and collected for an instrument intercomparison experiment [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.983256
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Published: 2025-06-26 • DOI registered: 2025-07-25
Abstract:
An instrument intercomparison experiment was performed on the San Lorenzo Maersk (formerly Cap San Lorenzo) container ship. Here we show the results from the HydroC CO2-FT membrane-based pCO2 instrument, which was installed next to the existing installation of a General Oceanics (GO) showerhead equilibrator system. The functioning principle of the HydroC involves dissolved CO2 molecules passing the flow head and diffusing through a TOUGH membrane into an internal gas circuit. The mole fraction of CO2 is determined using a temperature stabilized non-dispersive infrared spectrometer (NDIR). The partial pressure of carbon dioxide was calculated in the surface water pumped to the engine room from the ship's underway system. The data were quality-controlled, processed according to the manufacturer instructions, and interpolated on a 1-minute time grid. The experiment took place between 2021 and 2023 over two phases and nine journeys (each up to 11 days long). During phase one (2021), a standard version of the HydroC was used. During phase two (2023), a prototype version with integrated cleaning cycle was used. The last journey in phase two (October-November 2023) also benefited from gas standard correction. The data were collected in the Atlantic Ocean, on transects between the coasts of Europe (Algeciras, Spain) and South America (Santos, Brazil). The pCO2 data in this data submission come from the membrane-based sensor; the pCO2 data from the GO instrument are available on the SOCAT database.
Supplement to:
Macovei, Vlad Alexandru; Lefèvre, Nathalie; Diverrès, Denis; Kinski, Nadja; Listing, Oliver; Voynova, Yoana G (2025): At-sea intercomparison of a membrane-based p CO 2 sensor and a traditional showerhead equilibrator system on a Ship-of-Opportunity. Limnology and Oceanography-Methods, lom3.10719, https://doi.org/10.1002/lom3.10719
Related to:
Bakker, Dorothee C E; Alin, Simone R; Aramaki, Takafumi; Barbero, Leticia; Bates, Nicholas R; Gkritzalis, Thanos; Jones, Steve D; Kozyr, Alexander; Lauvset, Siv K; Macovei, Vlad Alexandru; Metzl, Nicolas; Munro, David R; Nakaoka, Shin-Ichiro; O'Brien, Kevin M; Olsen, Are; Pierrot, Denis; Steinhoff, Tobias; Sullivan, Kevin F; Sutton, Adrienne; Sweeney, Colm; Wada, Chisato; Wanninkhof, Rik; Akl, John; Arbilla, Lisandro A; Azetsu-Scott, Kumiko; Battisti, Roman; Beatty, Cory M; Becker, Meike; Benoit-Cattin, Alice; Berghoff, Carla Florencia; Bittig, Henry C; Bonin, Jennifer A; Bott, Randy; Bozzano, Roberto; Burger, Eugene F; Brunetti, Fabio; Cantoni, Carolina; Castelli, Giuliano; Chambers, D; Chierici, Melissa; Corbo, Andrea; Cronin, Margot; Cross, Jessica; Currie, Kim I; Dentico, Carlotta; Emerson, Steven R; Enochs, Ian C; Enright, Matt P; Enyo, Kazutaka; Ericson, Ylva; Evans, Wiley; Fay, Amanda R; Feely, Richard A; Fragiacomo, Elena; Fransson, Agneta; Gehrung, Martina; Giani, Michele; Glockzin, Michael; Hoppema, Mario; Ibánhez, J Severino P; Kadono, K; Kamb, Linus; Kralj, Martina; Kristensen, Torstein; Laudicella, V Alessandro; Lefèvre, Nathalie; Leseurre, Coraline; Lo Monaco, Claire; Maenner Jones, Stacy; Maenza, Reinaldo A; McAuliffe, Anna M; Mdokwana, Baxolele; Monacci, Natalie M; Musielewicz, Sylvia; Neill, Craig; Newberger, Timothy; Nojiri, Yukihiro; Ohman, Mark D; Ólafsdóttir, Sólveig Rósa; Olivier, Léa; Omar, Abdirahman M; Osborne, John; Pensieri, Sara; Petersen, Wilhelm; Plüddemann, Albert J; Rehder, Gregor; Roden, Nicholas P; Rutgersson, Anna; Sallée, Jean Baptiste; Sanders, Richard; Sarpe, Dirk; Schirnick, Carsten; Schlitzer, Reiner; Send, Uwe; Skjelvan, Ingunn; Sutherland, Stewart C; T'Jampens, Michiel; Tamsitt, Veronica; Telszewski, Maciej; Theetaert, Hannelore; Tilbrook, Bronte; Trull, Tom W; Tsanwani, Mutshutshu; Van De Velde, Sebastiaan; van Heuven, Steven; Veccia, Martín H; Voynova, Yoana G; Weller, Robert A; Williams, Nancy L (2025): Surface Ocean CO2 Atlas Database Version 2025 (SOCATv2025) (NCEI Accession 0304549) [dataset]. NOAA National Centers for Environmental Information, https://doi.org/10.25921/648F-FV35 (The data from the other instrument are already published in the SOCAT database (https://socat.info/index.php/version-2025/) and can be found by searching by vessel name "Cap San Lorenzo" or "San Lorenzo Maersk" in the Interactive Data Set Viewer, depending on the phase of the experiment.)
Coverage:
Median Latitude: 6.772639 * Median Longitude: -25.252724 * South-bound Latitude: -23.795000 * West-bound Longitude: -44.099000 * North-bound Latitude: 35.922800 * East-bound Longitude: -5.491900
Date/Time Start: 2021-04-08T09:33:00 * Date/Time End: 2023-11-09T20:30:00
Minimum DEPTH, water: 2 m * Maximum DEPTH, water: 2 m
Event(s):
SLM_Track1 * Latitude Start: 20.769000 * Longitude Start: -20.094000 * Latitude End: -23.783000 * Longitude End: -44.097000 * Date/Time Start: 2021-04-08T09:33:00 * Date/Time End: 2021-04-14T19:40:00 * Method/Device: pCO2 sensor (pCO2) * Comment: Ship-of-Opportunity measurements of surface seawater pCO2 in the Atlantic Ocean; Standard version of the HydroC
SLM_Track2 * Latitude Start: -23.740000 * Longitude Start: -43.955000 * Latitude End: 35.299000 * Longitude End: -6.800000 * Date/Time Start: 2021-04-27T17:01:00 * Date/Time End: 2021-05-07T21:23:00 * Method/Device: pCO2 sensor (pCO2) * Comment: Ship-of-Opportunity measurements of surface seawater pCO2 in the Atlantic Ocean; Standard version of the HydroC
SLM_Track3 * Latitude Start: 35.296000 * Longitude Start: -6.977000 * Latitude End: -23.795000 * Longitude End: -44.099000 * Date/Time Start: 2021-05-27T11:40:00 * Date/Time End: 2021-06-05T06:59:00 * Method/Device: pCO2 sensor (pCO2) * Comment: Ship-of-Opportunity measurements of surface seawater pCO2 in the Atlantic Ocean; Standard version of the HydroC
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Macovei, Vlad Alexandru | |||
| 2 | Number | n | # | Macovei, Vlad Alexandru | ||
| 3 | LATITUDE | Latitude | Macovei, Vlad Alexandru | Geocode | ||
| 4 | LONGITUDE | Longitude | Macovei, Vlad Alexandru | Geocode | ||
| 5 | DATE/TIME | Date/Time | Macovei, Vlad Alexandru | Geocode | ||
| 6 | Device type | Device | Macovei, Vlad Alexandru | |||
| 7 | DEPTH, water | Depth water | m | Macovei, Vlad Alexandru | Geocode | |
| 8 | Carbon dioxide, partial pressure | pCO2 | µatm | Macovei, Vlad Alexandru | pCO2 sensor (pCO2) | measured in the engine room of a container ship from the pumped underway water, sensor measurement from membrane-equilibrated water sample, quality controlled, linearly interpolated on 1-minute time grid |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
334506 data points
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