In June 2019, the European project Ringo organized an intensive campaign near Orléans to compare vertical measurements of greenhouse gases and test measurements on new compounds. The project aims to better describe the atmosphere and validate satellite measurements.
Ringo, which stands for Readiness of ICOS for Necessities of integrated Global Observations, is working on expanding the European Icos infrastructure network and evaluate new measurements in the atmosphere, ecosystems and oceans. It aims to develop vertical measurements of atmospheric concentrations of CO2 and CH4, over a total column (Total Carbon Column Observing Network, TCCON) or according to vertical profiles, up to 30 km in altitude, using “aircores”. These measurements should help validate atmospheric transport models in the upper atmosphere, as well as spatial measurements of total columns from space by NASA’s Orbiting Carbon Observatory-2 (OCO-2) or Japan’s Greenhouse Gases Observing Satellite (GOSAT), and in a few years by Merlin and Microcarb (Cnes).
The French consortium on greenhouse gas measurement, including the Laboratoire des sciences du climat et l’environnement (LSCE), brought together the seven international research groups responsible for advancing aircore measurements at the Icos observatory in Trainou, in the Orleans forest. During a two-week campaign, they recorded thirty vertical profiles of CO2, CH4 and CO, up to altitudes of 30-35 km. These data from these measurements is now being analyzed. The LSCE researchers were also able to measure N2O and COS (carbon oxysulfide) profiles for the first time and test altitude tracking by injecting a gas into the aircore.
Part of this campaign was shared with Magic 2019 (Monitoring Atmospheric composition and Greenhouse gases through multi-Instrument Campaigns), involving airborne measurements on board the Falcon de Safire (Service des avions français instrumentés pour la recherche en environnement) and aircores at the Aire-sur-Adour and Le Puy de Dôme sites.