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Acetone Atmospheric Distribution Retrieved From Space
Author(s) -
Franco B.,
Clarisse L.,
Stavrakou T.,
Müller J.F.,
Pozzer A.,
HadjiLazaro J.,
Hurtmans D.,
Clerbaux C.,
Coheur P.F.
Publication year - 2019
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2019gl082052
Subject(s) - environmental science , acetone , northern hemisphere , atmospheric sciences , ozone , atmospheric sounding , atmosphere (unit) , meteorology , chemistry , geology , physics , organic chemistry
As one of the most abundant oxygenated volatile organic compounds in the atmosphere, acetone (CH 3 C[O]CH 3 ) influences atmospheric oxidants levels and ozone formation. Here we report the first unambiguous identification of acetone from the nadir‐viewing satellite sounder Infrared Atmospheric Sounding Interferometer (IASI). Via a neural network‐based retrieval approach that was previously applied to the retrieval of other weak absorbers, we obtain daily global acetone retrievals. A first intercomparison with independent measurements is conducted. As the retrieval method is computationally fast, it allowed the full reprocessing of the 2007–2018 IASI time series. Analysis of the retrieved global product and its seasonality suggests that emissions of acetone and precursors from the terrestrial biosphere at Northern Hemisphere middle and high latitudes are the main contributors to the atmospheric acetone abundance, more than year‐round oxidation of anthropogenic isoalkanes. Remarkably, biomass burning does not appear to be a strong global source of acetone.