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    Spaceborne Measurements of Formic and Acetic Acids: A Global View of the Regional Sources

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    Authors
    Franco, B.
    Clarisse, L.
    Stavrakou, T.
    Müller, J.‐F.
    Taraborrelli, D.
    Hadji‐Lazaro, J.
    Hannigan, J.W.
    Hase, F.
    Hurtmans, D.
    Jones, N.
    Lutsch, E.
    Mahieu, E.
    Ortega, I.
    Schneider, M.
    Strong, K.
    Vigouroux, C.
    Clerbaux, C.
    Coheur, P.-F.
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    Discipline
    Physical sciences
    Subject
    acetic acid
    formic acid
    IASI
    neural network
    infrared spectroscopy
    satellite remote sensing
    Audience
    Scientific
    Date
    2020
    Metadata
    Show full item record
    Description
    Formic (HCOOH) and acetic acids (CH3COOH) are the most abundant carboxylic acids inthe Earth's atmosphere and key compounds to aqueous-phase chemistry. Here we present the firstdistributions of CH3COOH retrieved from the 2007–2018 satellite observations of the nadir-lookinginfrared atmospheric sounding interferometer (IASI), using a neural network-based retrieval approach. Ajoint analysis with the IASI HCOOH product reveals that the two species exhibit similar distributions,seasonality, and atmospheric burden, pointing to major common sources. We show that their abundance ishighly correlated to isoprene and monoterpenes emissions, as well as to biomass burning. Over Africa,evidence is provided that residual smoldering combustion might be a major driver of the HCOOH andCH3COOH seasonality. Earlier seasonal enhancement of HCOOH at Northern Hemisphere middle andhigh latitudes and late seasonal secondary peaks of CH3COOH in the tropics suggest that sources andproduction pathways specific to each species are also at play.
    Citation
    Franco, B.; Clarisse, L.; Stavrakou, T.; Müller, J.‐F.; Taraborrelli, D.; Hadji‐Lazaro, J.; Hannigan, J.W.; Hase, F.; Hurtmans, D.; Jones, N.; Lutsch, E.; Mahieu, E.; Ortega, I.; Schneider, M.; Strong, K.; Vigouroux, C.; Clerbaux, C.; Coheur, P.-F. (2020). Spaceborne Measurements of Formic and Acetic Acids: A Global View of the Regional Sources. , Geophysical Research Letters, Vol. 47, Issue 4, e2019GL086239, DOI: 10.1029/2019GL086239.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/7456
    doi: http://dx.doi.org/10.1029/2019GL086239
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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