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    GOME-2 total ozone columns from MetOp-A/MetOp-B and assimilation in the MACC system

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    Authors
    Hao, N.
    Koukouli, M.E.
    Inness, A.
    Valks, P.
    Loyola, D.G.
    Zimmer, W.
    Balis, D.S.
    Zyrichidou, I.
    Van Roozendael, M.
    Lerot, C.
    Spurr, R.J.D.
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    Discipline
    Earth and related Environmental sciences
    Subject
    algorithm
    atmospheric chemistry
    GOME
    MetOp
    satellite mission
    total ozone
    Audience
    Scientific
    Date
    2014
    Metadata
    Show full item record
    Description
    The two Global Ozone Monitoring Instrument (GOME-2) sensors operated in tandem are flying onboard EUMETSAT's (European Organisation for the Exploitation of Meteorological Satellites) MetOp-A and MetOp-B satellites, launched in October 2006 and September 2012 respectively. This paper presents the operational GOME-2/MetOp-A (GOME-2A) and GOME-2/MetOp-B (GOME-2B) total ozone products provided by the EUMETSAT Satellite Application Facility on Ozone and Atmospheric Chemistry Monitoring (O3M-SAF). These products are generated using the latest version of the GOME Data Processor (GDP version 4.7). The enhancements in GDP 4.7, including the application of Brion-Daumont-Malicet ozone absorption cross sections, are presented here. On a global scale, GOME-2B has the same high accuracy as the corresponding GOME-2A products. There is an excellent agreement between the ozone total columns from the two sensors, with GOME-2B values slightly lower with a mean difference of only 0.55±0.29%. First global validation results for 6 months of GOME-2B total ozone using ground-based measurements show that on average the GOME-2B total ozone data obtained with GDP 4.7 are slightly higher than, both, Dobson observations by about 2.0±1.0% and Brewer observations by about 1.0±0.8%. It is concluded that the total ozone columns (TOCs) provided by GOME-2A and GOME-2B are consistent and may be used simultaneously without introducing systematic effects, which has been illustrated for the Antarctic ozone hole on 18 October 2013. GOME-2A total ozone data have been used operationally in the Copernicus atmospheric service project MACC-II (Monitoring Atmospheric Composition and Climate-Interim Implementation) near-real-time (NRT) system since October 2013. The magnitude of the bias correction needed for assimilating GOME-2A ozone is reduced (to about g'6 DU in the global mean) when the GOME-2 ozone retrieval algorithm changed to GDP 4.7.
    Citation
    Hao, N.; Koukouli, M.E.; Inness, A.; Valks, P.; Loyola, D.G.; Zimmer, W.; Balis, D.S.; Zyrichidou, I.; Van Roozendael, M.; Lerot, C.; Spurr, R.J.D. (2014). GOME-2 total ozone columns from MetOp-A/MetOp-B and assimilation in the MACC system. , Atmospheric Measurement Techniques, Vol. 7, Issue 9, 2937-2951, DOI: 10.5194/amt-7-2937-2014.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/2838
    doi: http://dx.doi.org/10.5194/amt-7-2937-2014
    scopus: 2-s2.0-84907157990
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
    NewsHelpdeskBELSPO OA Policy

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