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    Validation of OMPS Suomi NPP and OMPS NOAA-20 Formaldehyde Total Columns With NDACC FTIR Observations

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    Authors
    Kwon, H.-A.
    González Abad, G.
    Nowlan, C.R.
    Chong, H.
    Souri, A.H.
    Vigouroux, C.
    Röhling, A.
    Kivi, R.
    Makarova, M.
    Notholt, J.
    Palm, M.
    Winkler, H.
    Té, Y.
    Sussmann, R.
    Rettinger, M.
    Mahieu, E.
    Strong, K.
    Lutsch, E.
    Yamanouchi, S.
    Nagahama, T.
    Hannigan, J.W.
    Zhou, M.
    Murata, I.
    Grutter, M.
    Stremme, W.
    De Mazière, M.
    Jones, N.
    Smale, D.
    Morino, I.
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    Discipline
    Earth and related Environmental sciences
    Subject
    formaldehyde
    OMPS
    Suomi NPP
    NOAA-20
    FTIR
    validation
    Audience
    Scientific
    Date
    2023
    Metadata
    Show full item record
    Description
    We validate formaldehyde (HCHO) vertical column densities (VCDs) from Ozone Mapping and Profiler Suite Nadir Mapper (OMPS-NM) instruments onboard the Suomi National Polar-orbiting Partnership (Suomi NPP) satellite for 2012–2020 and National Oceanic and Atmospheric Administration-20 (NOAA-20) satellite for 2018–2020, hereafter referred to as OMPS-NPP and OMPS-N20, with ground-based Fourier-Transform Infrared (FTIR) observations of the Network for the Detection of Atmospheric Composition Change (NDACC). OMPS-NPP/N20 HCHO products reproduce seasonal variability at 24 FTIR sites. Monthly variability of OMPS-NPP/N20 has a very good agreement with FTIR, showing correlation coefficients of 0.83 and 0.88, respectively. OMPS-NPP (N20) biases averaged over all sites are −0.9 (4) ± 3 (6)\%. However, at clean sites (with VCDs < 4.0 × 1015 molecules cm−2), positive biases of 20 (32) ± 6 (18)\% occur for OMPS-NPP (N20). At sites with HCHO VCDs > 4.0 × 1015 molecules cm−2, negative biases of −15\% ± 4\% appear for OMPS-NPP, but OMPS-N20 shows smaller bias of 0.5\% ± 6\% due to its smaller ground pixel footprints. Therefore, smaller satellite footprint sizes are important in distinguishing small-scale plumes. In addition, we discuss a bias correction and provide lower limit for the monthly uncertainty of OMPS-NPP/N20 HCHO products. The total uncertainty for OMPS-NPP (N20) at clean sites is 0.7 (0.8) × 1015 molecules cm−2, corresponding to a relative uncertainty of 32 (30)\%. In the case of HCHO VCDs > 4.0 × 1015 molecules cm−2, however, the relative uncertainty in HCHO VCDs for OMPS-NPP (N20) decreases to 31 (18)\%.
    Citation
    Kwon, H.-A.; González Abad, G.; Nowlan, C.R.; Chong, H.; Souri, A.H.; Vigouroux, C.; Röhling, A.; Kivi, R.; Makarova, M.; Notholt, J.; Palm, M.; Winkler, H.; Té, Y.; Sussmann, R.; Rettinger, M.; Mahieu, E.; Strong, K.; Lutsch, E.; Yamanouchi, S.; Nagahama, T.; Hannigan, J.W.; Zhou, M.; Murata, I.; Grutter, M.; Stremme, W.; De Mazière, M.; Jones, N.; Smale, D.; Morino, I. (2023). Validation of OMPS Suomi NPP and OMPS NOAA-20 Formaldehyde Total Columns With NDACC FTIR Observations. , Earth and Space Science, Vol. 10, Issue 5, e2022EA002778, DOI: 10.1029/2022EA002778.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/10994
    doi: http://dx.doi.org/10.1029/2022EA002778
    scopus:
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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