• Login
     
    View Item 
    •   ORFEO Home
    • Royal Belgian Institute for Space Aeronomy
    • BIRA-IASB publications
    • View Item
    •   ORFEO Home
    • Royal Belgian Institute for Space Aeronomy
    • BIRA-IASB publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Validation of MOPITT carbon monoxide using ground-based Fourier transform infrared spectrometer data from NDACC

    Thumbnail
    View/Open
    Buchholz(2017a).pdf (8.217Mb)
    Authors
    Buchholz, R.R.
    Deeter, M.N.
    Worden, H.M.
    Gille, J.
    Edwards, D.P.
    Hannigan, J.W.
    Jones, N.B.
    Paton-Walsh, C.
    Griffith, D.W.T.
    Smale, D.
    Robinson, J.
    Strong, K.
    Conway, S.
    Sussmann, R.
    Hase, F.
    Blumenstock, T.
    Mahieu, E.
    Langerock, B.
    Show allShow less
    Discipline
    Earth and related Environmental sciences
    Subject
    atmospheric chemistry
    carbon monoxide
    Fourier transform
    infrared spectroscopy
    model validation
    MOPITT
    satellite data
    Audience
    Scientific
    Date
    2017
    Metadata
    Show full item record
    Description
    The Measurements of Pollution in the Troposphere (MOPITT) satellite instrument provides the longest continuous dataset of carbon monoxide (CO) from space. We perform the first validation of MOPITT version 6 retrievals using total column CO measurements from ground-based remote-sensing Fourier transform infrared spectrometers (FTSs). Validation uses data recorded at 14 stations, that span a wide range of latitudes (80° N to 78° S), in the Network for the Detection of Atmospheric Composition Change (NDACC). MOPITT measurements are spatially co-located with each station, and different vertical sensitivities between instruments are accounted for by using MOPITT averaging kernels (AKs). All three MOPITT retrieval types are analyzed: thermal infrared (TIR-only), joint thermal and near infrared (TIR-NIR), and near infrared (NIR-only). Generally, MOPITT measurements overestimate CO relative to FTS measurements, but the bias is typically less than 10 %. Mean bias is 2.4 % for TIR-only, 5.1 % for TIR-NIR, and 6.5 % for NIR-only. The TIR-NIR and NIR-only products consistently produce a larger bias and lower correlation than the TIR-only. Validation performance of MOPITT for TIR-only and TIR-NIR retrievals over land or water scenes is equivalent. The four MOPITT detector element pixels are validated separately to account for their different uncertainty characteristics. Pixel 1 produces the highest standard deviation and lowest correlation for all three MOPITT products. However, for TIR-only and TIR-NIR, the error-weighted average that includes all four pixels often provides the best correlation, indicating compensating pixel biases and well-captured error characteristics. We find that MOPITT bias does not depend on latitude but rather is influenced by the proximity to rapidly changing atmospheric CO. MOPITT bias drift has been bound geographically to within ±0.5 % yr-1 or lower at almost all locations.
    Citation
    Buchholz, R.R.; Deeter, M.N.; Worden, H.M.; Gille, J.; Edwards, D.P.; Hannigan, J.W.; Jones, N.B.; Paton-Walsh, C.; Griffith, D.W.T.; Smale, D.; Robinson, J.; Strong, K.; Conway, S.; Sussmann, R.; Hase, F.; Blumenstock, T.; Mahieu, E.; Langerock, B. (2017). Validation of MOPITT carbon monoxide using ground-based Fourier transform infrared spectrometer data from NDACC. , Atmospheric Measurement Techniques, Vol. 10, Issue 5, 1927-1956, DOI: 10.5194/amt-10-1927-2017.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/6894
    doi: http://dx.doi.org/10.5194/amt-10-1927-2017
    scopus: 2-s2.0-85020230215
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
    NewsHelpdeskBELSPO OA Policy

    Browse

    All of ORFEOCommunities & CollectionsBy Issue DateAuthorsTitlesDisciplinesThis CollectionBy Issue DateAuthorsTitlesDisciplines
     

    DSpace software copyright © 2002-2016  DuraSpace
    Send Feedback | Cookie Information
    Theme by 
    Atmire NV