Year | NO2 (ppmv) | U(ti) | U'(ti) | CO2 (ppmv) | U(ti) | U'(ti) |
2011 2012 2013 2014 | 135.695 127.516 133.934 132.747 | 0.000 1.509 0.686 −1.097 | −2.057 0.137 −2.194 −1.920 | 382.370 385.108 388.111 392.186 | 1.509 0.960 1.783 0.411 | −1.509 −0.960 −0.137 −0.411 |