Surface pressure retrieval from SCIAMACHY measurements in the O 2 A Band: validation of the measurements and sensitivity on aerosols

摘要: Abstract. We perform surface pressure retrievals from cloud-free Oxygen A band measurements of SCIAMACHY. These can be well validated because is a quantity that is, in general, accurately known meteorological models. Therefore, and their validation provide important insight into the quality instrument calibration. Furthermore, they which are affected by similar radiation transport processes, for example retrieval total columns H2O, CO, CO2 CH4. In our aerosols neglected. Using synthetic measurements, it shown low to moderate albedos this leads an underestimation retrieved pressures. For high generally overestimation The pressures SCIAMACHY indeed show dependence on albedo, when compared corresponding database. However, offset about 20 hPa was found, not caused neglecting retrieval. same found comparing those co-located GOME measurements. This implies calibration error By adding 0.86% continuum reflectance at 756 nm systematic bias vanishes.