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    Intercomparison of the influence of tropospheric clouds on UV-visible absorptions detected during the NDSC intercomparison campaign at OHP in June 1996

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    Authors
    Pfeilsticker, K.
    Arlander, D.W.
    Burrows, J.P.
    Erle, F.
    Gil, M.
    Goutail, F.
    Hermans, C.
    Lambert, J.-C.
    Platt, U.
    Pommereau, J.-P.
    Richter, A.
    Sarkissian, A.
    Van Roozendael, M.
    Wagner, T.
    Winterrath, T.
    Show allShow less
    Discipline
    Earth and related Environmental sciences
    Subject
    Gas absorption
    Light scattering
    Nitrogen oxides
    Ozone
    Ultraviolet spectrometers
    Upper atmosphere
    Water absorption
    Nitrogen oxides
    Cumulonimbus cloud
    Mie scattering
    Network for the detection of stratospheric change
    Radiative transfer
    Tropospheric clouds
    Zenith sky light
    Clouds
    Troposphere
    optical property
    troposphere
    ultraviolet radiation
    Chemical process
    Cloudy skies
    Intercomparisons
    Measurements of
    Mie scattering
    Pathlengths
    Tropospheric clouds
    UV-visible absorption
    Audience
    Scientific
    Date
    1999
    Metadata
    Show full item record
    Description
    The influence of tropospheric clouds on zenith sky light (or brief ZSL-DOAS) measurements of stratospheric gases is investigated. From a large set of intercomparison studies including six simultaneously operated UV/visible spectrometers, the zenith sky absorptions of O3, O4, NO2, and H2O are found to increase considerably under the investigated Cumulonimbus (Cb) cloud. The accuracy of the inferred visible O3 absorptions, however, are affected by interfering H2O absorptions. The increased cloudy sky absorptions are - attributed to increased pathlengths due to multiple Mie scattering and hence interstitial gaseous absorptions inside the cloud. The absorptions detected for chemically inert gases like O4 (and H2O) are found to be inconsistent with those detected for NO2 and O3. This finding indicates that O3 and NO2 are modified by cloud related transport or chemical processes.
    Citation
    Pfeilsticker, K.; Arlander, D.W.; Burrows, J.P.; Erle, F.; Gil, M.; Goutail, F.; Hermans, C.; Lambert, J.-C.; Platt, U.; Pommereau, J.-P.; Richter, A.; Sarkissian, A.; Van Roozendael, M.; Wagner, T.; Winterrath, T. (1999). Intercomparison of the influence of tropospheric clouds on UV-visible absorptions detected during the NDSC intercomparison campaign at OHP in June 1996. , Geophysical Research Letters, Vol. 26, Issue 8, 1169-1172, DOI: 10.1029/1999GL900198.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/5364
    doi: http://dx.doi.org/10.1029/1999GL900198
    scopus: 2-s2.0-0033560521
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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