Cited by 7Atmospheric chemistry and aerosolsAtmospheric Ozone and ClimateAtmospheric and Environmental Gas Dynamics

An estimate of the global budget and distribution of ethanol using a global 3-D atmospheric chemistry transport model STOCHEM-CRI

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Khan, M.A.H., Glaubes, H., Kent, A., Harrison, T.G., Foulds, A., Percival, C.J., Shallcross, D.E.·2017·Transactions of the Royal Society of South Africa

Abstract

The atmospheric global budget and distribution of ethanol have been investigated using a global 3-dimensional chemistry transport model, STOCHEM-CRI. Ethanol, a precursor to acetaldehyde and peroxyacetyl nitrate (PAN), is found throughout the troposphere with a global burden of 0.024–0.25 Tg. The atmospheric lifetime of ethanol is found to be 1.1–2.8 days, which is in excellent agreement with estimates established by previous studies. The main global source of ethanol is from direct emission (99%) and the remainder (1%) being produced via peroxy radical reactions. In terms of removal rates of ethanol in the atmosphere, oxidation by hydroxyl radicals (OH) accounted for 51%, dry deposition 8% and wet deposition accounted for 41%. Globally there are significant concentrations of ethanol over equatorial Africa, North America and parts of Asia with considerably higher concentrations modelled over Saudi Arabia and Eastern Canada. Through comparison of measured and modelled ethanol data, it is apparent that the underestimation of the source strength of ethanol and the coarse resolution of the STOCHEM-CRI model produce the discrepancies between the model and the measured data mostly in urban areas. The increased vegetation and anthropogenic emissions of ethanol lead to an increase in the production of acetaldehyde (by up to 90%) and peroxyacetyl nitrate (by up to 10%) which disrupts the NOx-ozone balance, promoting ozone production (by up to 1.4%) in the equatorial regions.

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Crossref · 10.1080/0035919x.2016.1274276

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Authors
Khan, M. A. H., Glaubes, H., Kent, A., Harrison, T. G., Foulds, A., Percival, C. J., & Shallcross, D. E.
Affiliations
  • University of Bristol (GB)
  • University of Manchester (GB)
Corresponding author
Shallcross, D.E.
Venue
Transactions of the Royal Society of South Africa
Published
2017-02-07
Volume
72
Issue
2
Pages
174-183
ISSN
  • 0035-919X (ISSN-L)
  • 2154-0098
OpenAlex
W2587400689
Cited by
7
References
43
Citations by year
2025: 1 · 2021: 1 · 2020: 3 · 2018: 2
FWCI
0.79
Type
journal article
Language
en
Licence
other-oa
Locations
  • Transactions of the Royal Society of South Africa (publishedVersion)
  • Explore Bristol Research (acceptedVersion, other-oa)
  • Bristol Research (University of Bristol) (acceptedVersion, other-oa)
  • Research Explorer (The University of Manchester) (submittedVersion, other-oa)
Funders
Natural Environment Research Council (NE/K01501X)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric chemistry and aerosols
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Atmospheric Ozone and Climate
  • Physical Sciences › Environmental Science › Global and Planetary Change › Atmospheric and Environmental Gas Dynamics
Keywords
ethanol, atmospheric budget, global distribution, atmospheric lifetime, ethanol emissions, hydroxyl radical oxidation, dry deposition, wet deposition, acetaldehyde, peroxyacetyl nitrate, ozone formation, model validation, equatorial region

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