Fig. 5
Examples of CO2 CH4 and CO vertical profiles from the CHE nature run at Sodankylä (67.37°N, 26.63°E). The nature run is compared to NOAA AirCore (v20201223) observations36,39 and the CAMS CO2 and CH4 inversion57,65,66 (a–i) during three days in June, depicted by the dashed lines in (j) where the nature run hovmöller plot for CO2 shows the temporal variability of the vertical profile at Sodankylä over the whole month of June. The solid black and magenta lines show the time series of XCO2 and near-surface CO2 averaged over the model levels from the surface to 400 m above the surface (SFC CO2) respectively.
