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    Eight-component retrievals from ground-based MAX-DOAS observations

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    Authors
    Irie, H.
    Takashima, H.
    Kanaya, Y.
    Boersma, K.F.
    Gast, L.
    Wittrock, F.
    Brunner, D.
    Zhou, Y.
    Van Roozendael, M.
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    Discipline
    Earth and related Environmental sciences
    Subject
    aerosol composition
    air mass
    algorithm
    atmospheric modeling
    atmospheric plume
    data set
    ground-based measurement
    mixing ratio
    nitrogen dioxide
    spatial resolution
    spectroscopy
    troposphere
    ultraviolet radiation
    vertical profile
    visible spectrum
    volume
    wavelength
    Cabauw
    Netherlands
    Utrecht [Netherlands]
    Audience
    Scientific
    Date
    2011
    Metadata
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    Description
    We attempt for the first time to retrieve lower-tropospheric vertical profile information for 8 quantities from ground-based Multi-Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) observations. The components retrieved are the aerosol extinction coefficients at two wavelengths, 357 and 476 nm, and NO2, HCHO, CHOCHO, H2O, SO2, and O3 volume mixing ratios. A Japanese MAX-DOAS profile retrieval algorithm, version 1 (JM1), is applied to observations performed at Cabauw, the Netherlands (51.97° N, 4.93° E), in June–July 2009 during the Cabauw Intercomparison campaign of Nitrogen Dioxide measuring Instruments (CINDI). Of the retrieved profiles, we focus here on the lowest-layer data (mean values at altitudes 0–1 km), where the sensitivity is usually highest owing to the longest light path. In support of the capability of the multi-component retrievals, we find reasonable overall agreement with independent data sets, including a regional chemical transport model (CHIMERE) and in situ observations performed near the surface (2–3 m) and at the 200-m height level of the tall tower in Cabauw. Plumes of enhanced HCHO and SO2 were likely affected by biogenic and ship emissions, respectively, and an improvement in their emission strengths is suggested for better agreement between CHIMERE simulations and MAX-DOAS observations. Analysis of air mass factors indicates that the horizontal spatial representativeness of MAX-DOAS observations is about 3–15 km (depending mainly on aerosol extinction), comparable to or better than the spatial resolution of current UV-visible satellite observations and model calculations. These demonstrate that MAX-DOAS provides multi-component data useful for the evaluation of satellite observations and model calculations and can play an important role in bridging different data sets having different spatial resolutions.
    Citation
    Irie, H.; Takashima, H.; Kanaya, Y.; Boersma, K.F.; Gast, L.; Wittrock, F.; Brunner, D.; Zhou, Y.; Van Roozendael, M. (2011). Eight-component retrievals from ground-based MAX-DOAS observations. , Atmospheric Measurement Techniques, Vol. 4, Issue 6, 1027-1044, DOI: 10.5194/amt-4-1027-2011.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/3084
    doi: http://dx.doi.org/10.5194/amt-4-1027-2011
    scopus: 2-s2.0-84864514718
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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