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

Journal Article


Abstract


  • ©2020. American Geophysical Union. All Rights Reserved. Formic (HCOOH) and acetic acids (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.

Authors


  •   Franco, Bruno (external author)
  •   Clarisse, L (external author)
  •   Stavrakou, T (external author)
  •   Müller, J (external author)
  •   Taraborrelli, D (external author)
  •   Hadji-Lazaro, J (external author)
  •   Hannigan, J (external author)
  •   Hase, Frank (external author)
  •   Hurtmans, D (external author)
  •   Jones, Nicholas B.
  •   Lutsch, E (external author)
  •   Mahieu, E (external author)
  •   Ortega, I (external author)
  •   Schneider, Michael (external author)
  •   Strong, Kimberly (external author)
  •   Vigouroux, C (external author)
  •   Clerbaux, C (external author)
  •   Coheur, P (external author)

Publication Date


  • 2020

Citation


  • Franco, B., Clarisse, L., Stavrakou, T., Müller, J., Taraborrelli, D., Hadji-Lazaro, J., Hannigan, J., Hase, F., Hurtmans, D., Jones, N., Lutsch, E., Mahieu, E., Ortega, I., Schneider, M., Strong, K., Vigouroux, C., Clerbaux, C. & Coheur, P. (2020). Spaceborne Measurements of Formic and Acetic Acids: A Global View of the Regional Sources. Geophysical Research Letters, 47 (4),

Scopus Eid


  • 2-s2.0-85081079100

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers1/1215

Has Global Citation Frequency


Volume


  • 47

Issue


  • 4

Place Of Publication


  • United States

Abstract


  • ©2020. American Geophysical Union. All Rights Reserved. Formic (HCOOH) and acetic acids (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.

Authors


  •   Franco, Bruno (external author)
  •   Clarisse, L (external author)
  •   Stavrakou, T (external author)
  •   Müller, J (external author)
  •   Taraborrelli, D (external author)
  •   Hadji-Lazaro, J (external author)
  •   Hannigan, J (external author)
  •   Hase, Frank (external author)
  •   Hurtmans, D (external author)
  •   Jones, Nicholas B.
  •   Lutsch, E (external author)
  •   Mahieu, E (external author)
  •   Ortega, I (external author)
  •   Schneider, Michael (external author)
  •   Strong, Kimberly (external author)
  •   Vigouroux, C (external author)
  •   Clerbaux, C (external author)
  •   Coheur, P (external author)

Publication Date


  • 2020

Citation


  • Franco, B., Clarisse, L., Stavrakou, T., Müller, J., Taraborrelli, D., Hadji-Lazaro, J., Hannigan, J., Hase, F., Hurtmans, D., Jones, N., Lutsch, E., Mahieu, E., Ortega, I., Schneider, M., Strong, K., Vigouroux, C., Clerbaux, C. & Coheur, P. (2020). Spaceborne Measurements of Formic and Acetic Acids: A Global View of the Regional Sources. Geophysical Research Letters, 47 (4),

Scopus Eid


  • 2-s2.0-85081079100

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers1/1215

Has Global Citation Frequency


Volume


  • 47

Issue


  • 4

Place Of Publication


  • United States