Research Article

Sensitivity of CO2 and CH4 Annual Cycles to Different Meteorological Variables at a Rural Site in Northern Spain

Figure 3

Annual evolution of the boundary layer height (BLH) CO2 (a) and CH4 (b) during the day. Three situations were considered: with all the observations (cyan line), for boundary layers below 400 m (red line), and for boundary layer heights above 800 m (green line). The appearance frequency for the low and high boundary layer is also shown.
(a)
(b)