Reference : Spaceborne Measurements of Formic and Acetic Acid: A Global View of the Regional Sources
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Spaceborne Measurements of Formic and Acetic Acid: A Global View of the Regional Sources
Franco, B []
Clarisse, L []
Stavrakou, T []
Müller, J-F []
Taraborrelli, D []
Hadji-Lazaro, J []
Hannigan, JW []
Hase, F []
Hurtmans, D []
Jones, N []
Lutsch, E []
Mahieu, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Ortega, I []
Schneider, M []
Strong, K []
Vigouroux, C []
Clerbaux, C []
Coheur, PF []
Geophysical Research Letters
Yes (verified by ORBi)
[en] remote sensing ; atmospheric composition ; formic acid ; acetic acid
[en] Formic (HCOOH) and acetic acid (CH3COOH) are the most abundant carboxylic acids in the Earth’s atmosphere and key compounds to aqueous-phase chemistry. Here we present the first distributions of CH3COOH retrieved from the 2007–2018 satellite observations of the nadir-looking Infrared Atmospheric Sounding Interferometer (IASI), using a neural network-based retrieval approach. A joint 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 is highly 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 and CH3COOH seasonality. Earlier seasonal enhancement of HCOOH at Northern Hemisphere middle and high latitudes, and late seasonal secondary peaks of CH3COOH in the tropics, suggest that sources and production pathways specific to each species are also at play.
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