EnviSat / SCIAMACHY validation with the LPMA / DOAS balloon gondola: Comparison of a) O3, NO2 and BrO profiles, b) the solar irradiance spectrum and c) limb radiances.
Marcel Dorf(1), Klaus Pfeilsticker(1), Hartmut Bösch(2), Andre Butz(1), Martyn Chipperfield(3), Claude Camy-Peyret(4), Konstantin Gerilowski(5), Katja Grunow(6), Lena Kritten(1) and Frank Weidner(1)
(1) University of Heidelberg, INF 229, 69120 Heidelberg, Germany
(2) Jet Propulsion Laboratory, 4800 Oak Grove Drive, 91109 Pasadena, United States
(3) University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
(4) Université Pierre et Marie Curie, 3 rue Galilee, 94200 IVRY SUR SEINE, France
(5) University of Bremen, Otto-Hahn-Allee 1 , 28359 Bremen, Germany
(6) Freie Universität Berlin, C.-H.-Becker-Weg 6-10, 12165 Berlin, Germany
To date, 4 stratospheric measurements have been performed on the LPMA / DOAS (Limb Profile Monitor of the Atmosphere / Differential Optical Absorption Spectroscopy) balloon gondola for the validation EnviSat / SCIAMACHY Level 1 and 2 products at mid- and high-latitudes during different seasons and in the tropics. From the LPMA / DOAS UV/vis/near IR solar occultation measurements, vertical profiles of O3, NO, NO2, HNO3, BrO, ClONO2, OClO, HCl, IO, OIO and of some source gases (N2O and CH4) can simultaneously be inferred.
Photochemical change was calculated along air mass trajectories to match the balloon with the satellite observations. LPMA / DOAS profiles were used to validate O3, NO2 and BrO SCIAMACHY limb profiles. Furthermore, absolutely calibrated irradiance spectra, recorded at medium spectral resolution with the DOAS instrument, were compared with SCIAMACHY irradiance spectra.
Additionally a new UV/vis mini-DOAS spectrometer was applied during all validation fights, which measures skylight radiances and trace gases in fixed limb and scanning limb geometry. It provides a stringent test for RT modelling and allows the cross validation of trace gas profiles.
The present paper reports on a) the involved methods b) validation results and c) scientific implications.
Keywords: ESA European
Space Agency - Agence spatiale europeenne,
observation de la terre, earth observation,
satellite remote sensing,
teledetection, geophysique, altimetrie, radar,
chimique atmospherique, geophysics, altimetry, radar,