Surface partial pressure of CO2 in seawater: in-situ measurement along a round-the-world route (from 18 December 2022 to 14 December 2023)

Monitoring the surface partial pressure of carbon dioxide (pCO2) in the oceans is fundamental for understanding both the health of the oceans and the general state of theclimate across the planet. In this context, the measurement of this variable in areas where the scarcity of data is more marked is increasingly important: the long-distance sailor Giovanni Soldini's navigation using the Maserati Multi70 Trimaran, properly equipped for the measurement of this quantity, fits precisely into filling this gap. The comparison of the post-processed experimental data with the model data provided by the Copernicus platform, although based on some necessary method approximations, is encouraging, showing relative differences below 5 %. Note-1. Giovanni Soldini supplied raw data in the context of SmartBay S. Teresa project (link: S&R4Seas- Sailing and Research for Monitoring the Ocean | Smart Bay Santa Teresa) Note-2. Data were elaborated and presented at MetroSea24 by ENEA together with INRiM, in the context of MINKE project.