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Ground-level ozone influenced by circadian control of isoprene emissions

Hewitt, C. N. ; Ashworth, K. ; Boynard, A. ; Guenther, A. ; Langford, B. ; MacKenzie, A. R. ; Misztal, P. K. ; Nemitz, E. ; Owen, S. M. and Possell, M. , et al. (2011) In Nature Geoscience 4(10). p.671-674
Abstract

The volatile organic compound isoprene is produced by many plant species, and provides protection against biotic and abiotic stresses1. Globally, isoprene emissions from plants are estimated to far exceed anthropogenic emissions of volatile organic compounds2. Once in the atmosphere, isoprene reacts rapidly with hydroxyl radicals3 to form peroxy radicals, which can react with nitrogen oxides to form ground-level ozone4. Here, we use canopy-scale measurements of isoprene fluxes from two tropical ecosystems in Malaysia-a rainforest and an oil palm plantation-and three models of atmospheric chemistry to explore the effects of isoprene fluxes on ground-level ozone. We show that isoprene emissions... (More)

The volatile organic compound isoprene is produced by many plant species, and provides protection against biotic and abiotic stresses1. Globally, isoprene emissions from plants are estimated to far exceed anthropogenic emissions of volatile organic compounds2. Once in the atmosphere, isoprene reacts rapidly with hydroxyl radicals3 to form peroxy radicals, which can react with nitrogen oxides to form ground-level ozone4. Here, we use canopy-scale measurements of isoprene fluxes from two tropical ecosystems in Malaysia-a rainforest and an oil palm plantation-and three models of atmospheric chemistry to explore the effects of isoprene fluxes on ground-level ozone. We show that isoprene emissions in these ecosystems are under circadian control on the canopy scale, particularly in the oil palm plantation. As a result, these ecosystems emit less isoprene than present emissions models predict. Using local-, regional- and global-scale models of atmospheric chemistry and transport, we show that accounting for circadian control of isoprene emissions brings model predictions of ground-level ozone into better agreement with measurements, especially in isoprene-sensitive regions of the world.

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publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Geoscience
volume
4
issue
10
pages
4 pages
publisher
Nature Publishing Group
external identifiers
  • scopus:80053487770
ISSN
1752-0894
DOI
10.1038/ngeo1271
language
English
LU publication?
no
id
28c5d99d-08ed-4668-9c76-ba2e52559b04
date added to LUP
2020-11-19 23:30:47
date last changed
2022-04-03 06:28:19
@article{28c5d99d-08ed-4668-9c76-ba2e52559b04,
  abstract     = {{<p>The volatile organic compound isoprene is produced by many plant species, and provides protection against biotic and abiotic stresses<sup>1</sup>. Globally, isoprene emissions from plants are estimated to far exceed anthropogenic emissions of volatile organic compounds<sup>2</sup>. Once in the atmosphere, isoprene reacts rapidly with hydroxyl radicals<sup>3</sup> to form peroxy radicals, which can react with nitrogen oxides to form ground-level ozone<sup>4</sup>. Here, we use canopy-scale measurements of isoprene fluxes from two tropical ecosystems in Malaysia-a rainforest and an oil palm plantation-and three models of atmospheric chemistry to explore the effects of isoprene fluxes on ground-level ozone. We show that isoprene emissions in these ecosystems are under circadian control on the canopy scale, particularly in the oil palm plantation. As a result, these ecosystems emit less isoprene than present emissions models predict. Using local-, regional- and global-scale models of atmospheric chemistry and transport, we show that accounting for circadian control of isoprene emissions brings model predictions of ground-level ozone into better agreement with measurements, especially in isoprene-sensitive regions of the world.</p>}},
  author       = {{Hewitt, C. N. and Ashworth, K. and Boynard, A. and Guenther, A. and Langford, B. and MacKenzie, A. R. and Misztal, P. K. and Nemitz, E. and Owen, S. M. and Possell, M. and Pugh, T. A.M. and Ryan, A. C. and Wild, O.}},
  issn         = {{1752-0894}},
  language     = {{eng}},
  number       = {{10}},
  pages        = {{671--674}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Geoscience}},
  title        = {{Ground-level ozone influenced by circadian control of isoprene emissions}},
  url          = {{http://dx.doi.org/10.1038/ngeo1271}},
  doi          = {{10.1038/ngeo1271}},
  volume       = {{4}},
  year         = {{2011}},
}