Soil CO2 concentration, air temperature and atmospheric pressure data from OVPF/IPGP soil CO2 monitoring stations, from 2012 to 2022 (Piton de la Fournaise and Mayotte volcanoes)

Here, we present the dataset associated with the article “Seasonal environmental controls on soil CO2 dynamics at a high CO2 flux sites (Piton de la Fournaise and Mayotte volcanoes)” submitted to the AGU journal “JGR Biogeosciences” by the same authors. The data are the soil CO2 concentrations, air temperatures and atmospheric pressures recorded by the five soil CO2 monitoring stations of the Observatoire Volcanologique du Piton de la Fournaise – Institut de physique du Globe de Paris (OVPF/IPGP) from the date of their respective installation up to February 23rd 2022. Data are acquired hourly and transmitted in real time at the Observatoire Volcanologique du Piton de la Fournaise (OVPF/IPGP). Stations PNRN, PCRN, BLEN and GITN are located on the island of La Réunion and station UDMN is located on the island of Mayotte. The stations were designed by the Istituto Nazionale di Geofisica e Vulcanologia (INGV) Sezione di Palermo (Gurrieri et al., 2008). For the measurement of soil CO2 concentrations, a 50 cm long probe is inserted into the soil and connected by a Teflon pipe to a Gascard NG dual-wavelength nondispersive infrared gas analyzer (CO2 gas measurement range 0–10%). The molar fraction of CO2 is measured in a soil-air gas mixture pumped at 0.8 L/min and are automatically corrected for air temperature and atmospheric pressure effects on gas molecular density (Gurrieri and Valenza, 1988). Air temperature and atmospheric pressure are measure at each station a height of two meters. Temperature is measured by Mela® sensors PK-ME with a precision of ± 0.2K. Pressure is measured by STS® sensors ATM.ECO with a precision of ± 0.375 psi.