Intercomparison of ILAS/ADEOS with MIPAS-B measurements in late March 1997

Hermann Oelhaf; Herbert Fischer; Gerald Wetzel; Markus Stowasser; Felix Friedl-Vallon; Guido Maucher; Olaf Trieschmann; Roland Ruhnke; Yasuhiro Sasano

doi:10.1117/12.317747

18 August 1998 Intercomparison of ILAS/ADEOS with MIPAS-B measurements in late March 1997

Hermann Oelhaf, Herbert Fischer, Gerald Wetzel, Markus Stowasser, Felix Friedl-Vallon, Guido Maucher, Olaf Trieschmann, Roland Ruhnke, Yasuhiro Sasano

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Proceedings Volume 3501, Optical Remote Sensing of the Atmosphere and Clouds; (1998) https://doi.org/10.1117/12.317747
Event: Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environment, and Space, 1998, Beijing, China

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 NO_y 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.

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Hermann Oelhaf, Herbert Fischer, Gerald Wetzel, Markus Stowasser, Felix Friedl-Vallon, Guido Maucher, Olaf Trieschmann, Roland Ruhnke, and Yasuhiro Sasano "Intercomparison of ILAS/ADEOS with MIPAS-B measurements in late March 1997", Proc. SPIE 3501, Optical Remote Sensing of the Atmosphere and Clouds, (18 August 1998); https://doi.org/10.1117/12.317747

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