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Proceedings Paper

Intercomparison of ILAS/ADEOS with MIPAS-B measurements in late March 1997
Author(s): Hermann Oelhaf; Herbert Fischer; Gerald Wetzel; Markus Stowasser; Felix Friedl-Vallon; Guido Maucher; Olaf Trieschmann; Roland Ruhnke; Yasuhiro Sasano
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Paper Abstract

Embedded in the ILAS validation campaign a balloon flight was carried out with the limb emission sounder MIPAS-B in the early night of March 24, 1997. MIPAS-B is capable is capable of simultaneously measuring profiles of all molecules ILAS was covering. Key reservoir molecules like ClONO2 and N2O25 which are not or hard to measure with ILAS complement the ILAS set of target species and allow the partitioning and budge to NOy to be studied. The balloon was launched from Kiruna/Sweden. The distance of the mean location of tangent points between the satellite and the balloonborne observation was less than 150 km and the time was offset by less then 4 hours for the most adjacent overpass of ADEOS. The balloon observations covered the altitude range of 11.0 to 29.5 km. Vertical profiles of N2O, CH4, H2O, HNO3 NO2 and aerosol extinction obtained with MIPAS-B have been compared to those obtained with ILAS based on the three most adjacent ADEOS overpasses. Model calculations with the 3D chemical transport model KASIMA were used to account for nay deviations in the dynamical and chemical properties of the airmasses observed at the different times and locations of observation. The paper demonstrates the progress made in the consistency of the data sets when going from Version 3.0 to Version 3.1 of the ILAS data processing software. Excellent agreement between balloon and satellite observation has been found for HNO3 on the basis of the Version 3.1 results. The same holds for NO2 above 20 km provided the diurnal variation is taken into account. Discrepancies still exist with the Version 3.1 results in the lowermost part of the stratospheric for most gases and generally in the case of N2O.

Paper Details

Date Published: 18 August 1998
PDF: 9 pages
Proc. SPIE 3501, Optical Remote Sensing of the Atmosphere and Clouds, (18 August 1998); doi: 10.1117/12.317747
Show Author Affiliations
Hermann Oelhaf, Forschungszentrum Karlsruhe GmbH (Germany)
Herbert Fischer, Forschungszentrum Karlsruhe GmbH (Germany)
Gerald Wetzel, Forschungszentrum Karlsruhe GmbH (Germany)
Markus Stowasser, Forschungszentrum Karlsruhe GmbH (Germany)
Felix Friedl-Vallon, Forschungszentrum Karlsruhe GmbH (Germany)
Guido Maucher, Forschungszentrum Karlsruhe GmbH (Germany)
Olaf Trieschmann, Forschungszentrum Karlsruhe GmbH (Germany)
Roland Ruhnke, Forschungszentrum Karlsruhe GmbH (Germany)
Yasuhiro Sasano, National Institute for Environmental Studies (Germany)

Published in SPIE Proceedings Vol. 3501:
Optical Remote Sensing of the Atmosphere and Clouds
Jinxue Wang; Beiying Wu; Toshihiro Ogawa; Zheng-hua Guan, Editor(s)

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