The non-linear climate chemistry-response model AirClim 2.0 used for estimating CO2 and non-CO2 climate effects

AirClim is a non-linear climate-chemistry response model to simulate the climate effect resulting from aircraft emissions (V2.0). AirClim combines air traffic emissions with pre-calculated atmospheric impact data. For the pre-calculated data, climate–chemistry simulations are performed, with normalised emissions in idealised emission regions. For receiving the response surfaces for NO_x emissions on the O₃ and CH₄ concentration, and for the impact of H₂O emissions, the complex chemistry-climate model E39C/A was used. For the response surfaces of contrail induced cloudiness simulations with the ECHAM4-CCMod model (Burkhardt and were analysed. The climate effect of CO₂ is independent of the emission location due to its long lifetime. Therefore, a green function is used for the climate impact of CO₂. AirClim calculates the temporal development of concentration change, radiative forcing (RF) and near surface temperature change of the individual effects accounting for their different lifetime and dependency on the emission location.