Article (Scientific journals)
Spaceborne Measurements of Formic and Acetic Acid: A Global View of the Regional Sources
Franco, B; Clarisse, L; Stavrakou, T et al.
2020In Geophysical Research Letters, 47
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Keywords :
remote sensing; atmospheric composition; formic acid; acetic acid
Abstract :
[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.
Research center :
Sphères - SPHERES
Disciplines :
Earth sciences & physical geography
Author, co-author :
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  ;  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
More authors (8 more) Less
Language :
English
Title :
Spaceborne Measurements of Formic and Acetic Acid: A Global View of the Regional Sources
Publication date :
14 February 2020
Journal title :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Publisher :
Wiley, Washington, United States - District of Columbia
Volume :
47
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 May 2020

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