Summarized Results on Nitrogen Oxides.

<p>Model 1 covariables: difference in reference stations Ref.diff in µg/m³, centered reference baseline concentration Ref.base in µg/m³, centered index baseline concentration Ind.base in µg/m³, Diff 1/H = difference in 1/(height of inversion layer) in 1/m, Diff 1/V = 1/(wind velocity+0.01) in (m/s)⁻¹, difference in 1/P = 1/(amount of precipitation+0.01) (mm/h)⁻¹, centered difference in time Time.diff in years.