Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, EpiSciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

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

Abstract : 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.
Document type :
Journal articles
Complete list of metadata
Contributor : Catherine Cardon Connect in order to contact the contributor
Submitted on : Thursday, March 4, 2021 - 8:48:57 AM
Last modification on : Wednesday, May 4, 2022 - 3:48:23 AM
Long-term archiving on: : Saturday, June 5, 2021 - 6:16:43 PM


Publisher files allowed on an open archive



B. Franco, Lieven Clarisse, T. Stavrakou, Jean‐françois Müller, Domenico Taraborrelli, et al.. Spaceborne Measurements of Formic and Acetic Acid: A Global View of the Regional Sources. Geophysical Research Letters, American Geophysical Union, 2020, 47 (4), pp.e2019GL086239. ⟨10.1029/2019GL086239⟩. ⟨insu-02433197⟩



Record views


Files downloads