Carbon dioxide in cave air and soil air in some karstic areas of Belgium ; Le dioxyde de carbone dans l'air des grottes et du sol dans des régions karstiques de Belgique

peer reviewed ; ABSTRACT. Caves are privileged observatories of underground air and its carbon dioxide content. The carbon dioxide partial pressure in Belgian caves displays seasonal fluctuations with strong summer maxima. Besides, CO2 concentration has risen very significantly in Belgian caves since our first measurements in the nineteen sixties. To understand the cause of this rise, we have been measuring the air in the soil above the Comblain-au-Pont cave since 2008, with a device developed by Jean Godissart. These measurements show clear seasonal variations, the maximum occurring in early... Mehr ...