Comparisons of broadband radiative transfer calculations with MIPAS spectra

The upper panel of the figure shows mean spectra measured by MIPAS-Envisat (black) and calculated with KOPRA using retrieved trace gas concentrations (blue). The lower panel shows the difference MIPAS minus calculated spectra. HITRAN 2008 spectroscopic data has been used for the calculations. The wavenumber range shown is part of the MIPAS band A and covers the HNO3 emission region. Generally the calculated spectra at the HNO3 signatures are too low compared to the MIPAS measurements, especially at 885.45 and 886.15 cm-1. This means some of the spectroscopic data produces lines with an intensity too low.