UPDATE ON ENVISAT/SCIAMACHY VALIDATION WITH BALLOON-BORNE DOAS INSTRUMENTS: COMPARISON OF O3, NO2 AND BRO PROFILES

Here the level 2 product validation (profiles of O-3, NO2 and BrO inferred by the IUP Bremen) from the Envisat/SCIAMACHY instrument is updated with spectroscopic balloon-borne measurements of the same quantities during 2003 - 2009. Generally, the satellite and the balloon-borne O-3 retrievals agree within 15 to 20 % above 15 km. For NO2, a good agreement of < 20% is found for altitude > 18 km. For lower altitudes the relative differences increase, reaching about 40% at 15 km. For BrO we extend earlier validation studies of the BrO profile inter-comparison [1, 15]. A fair agreement of typical 20% discrepancies is found for BrO profile measurements between 15 and 25 km at mid and high-latitudes. For inter-comparisons of tropical measurements the discrepancy ranges between 20-50% above 20 km.