Fig. 2
Spatial variations of the CO2 measurements collected during survey throughout the target area (cell size 10 m). The maps were generated in Qgis 3.34 environment (https://qgis.org/download/) using Measurement interpolation generated in SAGA GIS environment (https://saga-gis.sourceforge.io/en/index.html). (a) Spatial variation of the airborne CO2 concentration. (b) Spatial variation of the oxygen isotope composition of the airborne CO2. (c) Spatial variation of the carbon isotope composition of the airborne CO2. Traces of the concentration profiles are reported (black lines). See text for description.
