| CH4 (ppmv) | O3 (ppmv) | NO2 (ppmv) | CO2 (ppmv) |
Solar radiation (MJ/m2) Relative humidity (%) Temperature (˚C) Wind speed (m/s) | 0.661* 0.859* −0.549 −0.906 | 0.571 0.345 −0.167 −0.518 | −0.106 −0.516 0.077 −0.317 | 0.656 0.646 0.962* 0.951* |