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

dc.contributor.authorFranco, B.
dc.contributor.authorClarisse, L.
dc.contributor.authorStavrakou, T.
dc.contributor.authorMüller, J.‐F.
dc.contributor.authorTaraborrelli, D.
dc.contributor.authorHadji‐Lazaro, J.
dc.contributor.authorHannigan, J.W.
dc.contributor.authorHase, F.
dc.contributor.authorHurtmans, D.
dc.contributor.authorJones, N.
dc.contributor.authorLutsch, E.
dc.contributor.authorMahieu, E.
dc.contributor.authorOrtega, I.
dc.contributor.authorSchneider, M.
dc.contributor.authorStrong, K.
dc.contributor.authorVigouroux, C.
dc.contributor.authorClerbaux, C.
dc.contributor.authorCoheur, P.-F.
dc.date2020
dc.date.accessioned2020-02-24T22:20:45Z
dc.date.available2020-02-24T22:20:45Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/7456
dc.descriptionFormic (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.
dc.languageeng
dc.titleSpaceborne Measurements of Formic and Acetic Acids: A Global View of the Regional Sources
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeacetic acid
dc.subject.freeformic acid
dc.subject.freeIASI
dc.subject.freeneural network
dc.subject.freeinfrared spectroscopy
dc.subject.freesatellite remote sensing
dc.source.titleGeophysical Research Letters
dc.source.volume47
dc.source.issue4
dc.source.pagee2019GL086239
Orfeo.peerreviewedYes
dc.identifier.doi10.1029/2019GL086239


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