Thermal and non-thermal components of pCO2 estimated from ASTAN cardinal buoy (western English Channel) data from 2015 to 2019

This dataset comprises two time series derived from partial pressure of CO2 (pCO2) data recorded at 30-minute intervals by the ASTAN cardinal buoy, located 3.1 km offshore from Roscoff in the western English Channel (France). The original pCO2 dataset was developed by Gac et al. (2020, (DOI:10.3389/fmars.2020.00712)-[https://doi.org/10.3389/fmars.2020.00712]). The version of this dataset used in Robache and Schmitt (2025, doi: 10.5194/egusphere-2025-972) is publicly available via Bozec et al. (2025, doi:10.17882/106537). The current dataset provides the thermal component of pCO2 (pCO2thermal, in µatm) and the non-thermal component (Xsat, in %) derived following the decomposition method of Takahashi et al. (2009, (DOI:10.1016/j.dsr2.2008.12.009)-[https://doi.org/10.1016/j.dsr2.2008.12.009]). Additional methodological details are outlined in Robache and Schmitt (2025). These data were derived from a collaboration with Yann Bozec through the ANR project CO2Coast (Principal Investigator: Hubert Loisel, ANR-20-CE01-0021). Important Note: This submission has been initially submitted to SEA scieNtific Open data Edition (SEANOE) publication service and received the recorded DOI. The metadata elements have been further processed (refined) in EMODnet Ingestion Service in order to conform with the Data Submission Service specifications.