Evaluating the potential of GOME-2 ozone column retrievals in the Chappuis bands

Here, we report on an evaluation of the potential for ozone retrievals in the Chappuis bands using GOME2 data. The theoretical precision is discussed and the results from retrievals using different settings are presented. It is shown that good agreement with UV retrievals can be achieved in many situations but that problems remain with interference from other absorbers, surface spectral reflectance properties, and also instrument calibration issues. The reasons for the problems are discussed and possible solutions suggested.