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Probabilistic estimation of future emissions of isoprene and surface oxidant chemistry associated with land-use change in response to growing food needs

Hardacre, C. J. ; Palmer, P. I. ; Engstrom, Kerstin LU ; Rounsevell, M. and Murray-Rust, D. (2013) In Atmospheric Chemistry and Physics 13(11). p.5451-5472
Abstract
We quantify the impact of land-use change, determined by our growing demand for food and biofuel production, on isoprene emissions and subsequent atmospheric oxidant chemistry in 2015 and 2030, relative to 1990, ignoring compound climate change effects over that period. We estimate isoprene emissions from an ensemble (n = 1000) of land-use change realizations from 1990-2050, broadly guided by the IPCC AR4/SRES scenarios A1 and B1. We also superimpose land-use change required to address projected biofuel usage using two scenarios: (1) assuming that world governments make no changes to biofuel policy after 2009, and (2) assuming that world governments develop biofuel policy with the aim of keeping equivalent atmospheric CO2 at 450 ppm. We... (More)
We quantify the impact of land-use change, determined by our growing demand for food and biofuel production, on isoprene emissions and subsequent atmospheric oxidant chemistry in 2015 and 2030, relative to 1990, ignoring compound climate change effects over that period. We estimate isoprene emissions from an ensemble (n = 1000) of land-use change realizations from 1990-2050, broadly guided by the IPCC AR4/SRES scenarios A1 and B1. We also superimpose land-use change required to address projected biofuel usage using two scenarios: (1) assuming that world governments make no changes to biofuel policy after 2009, and (2) assuming that world governments develop biofuel policy with the aim of keeping equivalent atmospheric CO2 at 450 ppm. We present the median and interquartile range (IQR) statistics of the ensemble and show that land-use change between -1.50 x 10(12) m(2) to +6.06 x 10(12) m(2) was found to drive changes in the global isoprene burden of -3.5 to +2.8 Tgyr(-1) in 2015 and -7.7 to +6.4 Tgyr(-1) in 2030. We use land-use change realizations corresponding to the median and IQR of these emission estimates to drive the GEOS-Chem global 3-D chemistry transport model to investigate the perturbation to global and regional surface concentrations of isoprene, nitrogen oxides (NO+NO2), and the atmospheric concentration and deposition of ozone (O-3). We show that across subcontinental regions the monthly surface O-3 increases by 0.1-0.8 ppb, relative to a zero land-use change calculation, driven by increases (decreases) in surface isoprene in high (low) NOx environments. At the local scale (4 degrees x 5 degrees) we find that surface O-3 increases by 5-12 ppb over temperate North America, China and boreal Eurasia, driven by large increases in isoprene emissions from short-rotation coppice crop cultivation for biofuel production. (Less)
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Contribution to journal
publication status
published
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in
Atmospheric Chemistry and Physics
volume
13
issue
11
pages
5451 - 5472
publisher
Copernicus Gesellschaft mbH
external identifiers
  • wos:000320380200003
  • scopus:84879022961
ISSN
1680-7324
DOI
10.5194/acp-13-5451-2013
language
English
LU publication?
yes
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0f7a98fd-b1ed-481e-a62f-9dd029c84851 (old id 3990523)
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2016-04-01 10:03:26
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2020-01-05 04:23:42
@article{0f7a98fd-b1ed-481e-a62f-9dd029c84851,
  abstract     = {We quantify the impact of land-use change, determined by our growing demand for food and biofuel production, on isoprene emissions and subsequent atmospheric oxidant chemistry in 2015 and 2030, relative to 1990, ignoring compound climate change effects over that period. We estimate isoprene emissions from an ensemble (n = 1000) of land-use change realizations from 1990-2050, broadly guided by the IPCC AR4/SRES scenarios A1 and B1. We also superimpose land-use change required to address projected biofuel usage using two scenarios: (1) assuming that world governments make no changes to biofuel policy after 2009, and (2) assuming that world governments develop biofuel policy with the aim of keeping equivalent atmospheric CO2 at 450 ppm. We present the median and interquartile range (IQR) statistics of the ensemble and show that land-use change between -1.50 x 10(12) m(2) to +6.06 x 10(12) m(2) was found to drive changes in the global isoprene burden of -3.5 to +2.8 Tgyr(-1) in 2015 and -7.7 to +6.4 Tgyr(-1) in 2030. We use land-use change realizations corresponding to the median and IQR of these emission estimates to drive the GEOS-Chem global 3-D chemistry transport model to investigate the perturbation to global and regional surface concentrations of isoprene, nitrogen oxides (NO+NO2), and the atmospheric concentration and deposition of ozone (O-3). We show that across subcontinental regions the monthly surface O-3 increases by 0.1-0.8 ppb, relative to a zero land-use change calculation, driven by increases (decreases) in surface isoprene in high (low) NOx environments. At the local scale (4 degrees x 5 degrees) we find that surface O-3 increases by 5-12 ppb over temperate North America, China and boreal Eurasia, driven by large increases in isoprene emissions from short-rotation coppice crop cultivation for biofuel production.},
  author       = {Hardacre, C. J. and Palmer, P. I. and Engstrom, Kerstin and Rounsevell, M. and Murray-Rust, D.},
  issn         = {1680-7324},
  language     = {eng},
  number       = {11},
  pages        = {5451--5472},
  publisher    = {Copernicus Gesellschaft mbH},
  series       = {Atmospheric Chemistry and Physics},
  title        = {Probabilistic estimation of future emissions of isoprene and surface oxidant chemistry associated with land-use change in response to growing food needs},
  url          = {http://dx.doi.org/10.5194/acp-13-5451-2013},
  doi          = {10.5194/acp-13-5451-2013},
  volume       = {13},
  year         = {2013},
}