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    Retrievals of formaldehyde from ground-based FTIR and MAX-DOAS observations at the Jungfraujoch station and comparisons with GEOS-Chem and IMAGES model simulations

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    Authors
    Franco, B.
    Hendrick, F.
    Van Roozendael, M.
    Muller, J.-F.
    Stavrakou, T.
    Marais, E.A.
    Bovy, B.
    Bader, W.
    Fayt, C.
    Hermans, C.
    Lejeune, B.
    Pinardi, G.
    Servais, C.
    Mahieu, E.
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    Discipline
    Earth and related Environmental sciences
    Subject
    aerosol formation
    atmospheric chemistry
    atmospheric transport
    database
    EOS
    formaldehyde
    FTIR spectroscopy
    ground-based measurement
    numerical model
    photooxidation
    remote sensing
    troposphere
    Alps
    Bern [Switzerland]
    Jungfraujoch
    Switzerland
    Audience
    Scientific
    Date
    2015
    Metadata
    Show full item record
    Description
    As an ubiquitous product of the oxidation of many volatile organic compounds (VOCs), formaldehyde (HCHO) plays a key role as a short-lived and reactive intermediate in the atmospheric photo-oxidation pathways leading to the formation of tropospheric ozone and secondary organic aerosols. In this study, HCHO profiles have been successfully retrieved from ground-based Fourier transform infrared (FTIR) solar spectra and UV-visible Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) scans recorded during the July 2010–December 2012 time period at the Jungfraujoch station (Swiss Alps, 46.5° N, 8.0° E, 3580 m a.s.l.). Analysis of the retrieved products has revealed different vertical sensitivity between both remote sensing techniques. Furthermore, HCHO amounts simulated by two state-of-the-art chemical transport models (CTMs), GEOS-Chem and IMAGES v2, have been compared to FTIR total columns and MAX-DOAS 3.6–8 km partial columns, accounting for the respective vertical resolution of each ground-based instrument. Using the CTM outputs as the intermediate, FTIR and MAX-DOAS retrievals have shown consistent seasonal modulations of HCHO throughout the investigated period, characterized by summertime maximum and wintertime minimum. Such comparisons have also highlighted that FTIR and MAX-DOAS provide complementary products for the HCHO retrieval above the Jungfraujoch station. Finally, tests have revealed that the updated IR parameters from the HITRAN 2012 database have a cumulative effect and significantly decrease the retrieved HCHO columns with respect to the use of the HITRAN 2008 compilation.
    Citation
    Franco, B.; Hendrick, F.; Van Roozendael, M.; Muller, J.-F.; Stavrakou, T.; Marais, E.A.; Bovy, B.; Bader, W.; Fayt, C.; Hermans, C.; Lejeune, B.; Pinardi, G.; Servais, C.; Mahieu, E. (2015). Retrievals of formaldehyde from ground-based FTIR and MAX-DOAS observations at the Jungfraujoch station and comparisons with GEOS-Chem and IMAGES model simulations. , Atmospheric Measurement Techniques, Vol. 8, Issue 4, 1733-1756, DOI: 10.5194/amt-8-1733-2015.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/2770
    doi: http://dx.doi.org/10.5194/amt-8-1733-2015
    scopus: 2-s2.0-84928492418
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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