Technical note: Assessment of float pH data quality control methods – a case study in the subpolar northwest Atlantic Ocean

Wimart-Rousseau, Cathy; Steinhoff, Tobias; Klein, Birgit; Bittig, Henry; Körtzinger, Arne

doi:https://doi.org/10.5194/bg-21-1191-2024

Articles | Volume 21, issue 5

https://doi.org/10.5194/bg-21-1191-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-21-1191-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 21, issue 5

Technical note

|

13 Mar 2024

Technical note |

| 13 Mar 2024

Technical note: Assessment of float pH data quality control methods – a case study in the subpolar northwest Atlantic Ocean

Cathy Wimart-Rousseau, Tobias Steinhoff, Birgit Klein, Henry Bittig, and Arne Körtzinger

Data sets

DE-SOOP-Atlantic Sail data T. Steinhoff https://meta.icos-cp.eu/resources/stations/OS_NA-VOS

Argo float data and metadata from Global Data Assembly Centre (Argo GDAC) - Snapshot of Argo GDAC of October 10st 2022 Argo https://doi.org/10.17882/42182#96550

Coriolis Global Data Assembly Centers (GDAC) site Coriolis https://data-argo.ifremer.fr/dac/coriolis/

Argo Argo international program https://argo.ucsd.edu

OceanOPS - Argo network’s operation OceanOPS https://www.ocean-ops.org

Western Subpolar North Atlantic transport variability, Cruise No. MSM94, 02. August - 06. September 2020, Emden (Germany) J. Karstensen et al. https://doi.org/10.48433/cr_msm94

Multibeam bathymetry raw data (Kongsberg EM 122 entire dataset) of RV MARIA S, MERIAN during cruise MSM94 J. Karstensen et al. https://doi.org/10.1594/PANGAEA.927311

Short summary

The marine CO₂ system can be measured independently and continuously by BGC-Argo floats since numerous pH sensors have been developed to suit these autonomous measurements platforms. By applying the Argo correction routines to float pH data acquired in the subpolar North Atlantic Ocean, we report the uncertainty and lack of objective criteria associated with the choice of the reference method as well the reference depth for the pH correction.