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| Titel |
Impacts of near-future cultivation of biofuel feedstocks on atmospheric composition and local air quality |
| VerfasserIn |
K. Ashworth, G. Folberth, C. N. Hewitt, O. Wild |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 12, no. 2 ; Nr. 12, no. 2 (2012-01-19), S.919-939 |
| Datensatznummer |
250010539
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| Publikation (Nr.) |
 copernicus.org/acp-12-919-2012.pdf |
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| Zusammenfassung |
| Large-scale production of feedstock crops for biofuels will lead to land use
changes. We quantify the effects of realistic land use change scenarios for
biofuel feedstock production on isoprene emissions and hence atmospheric
composition and chemistry using the HadGEM2 model. Two feedstocks are
considered: oil palm for biodiesel in the tropics and short rotation coppice
(SRC) in the mid-latitudes. In total, 69 Mha of oil palm and 9 Mha
of SRC are planted, each sufficient to replace just over 1% of
projected global fossil fuel demand in 2020. Both planting scenarios result
in increases in total global annual isoprene emissions of about 1%. In
each case, changes in surface concentrations of ozone and biogenic secondary
organic aerosol (bSOA) are substantial at the regional scale, with
implications for air quality standards. However, the changes in tropospheric
burden of ozone and the OH radical, and hence effects on global climate, are
negligible. Over SE Asia, one region of oil palm planting, increases in
annual mean surface ozone and bSOA concentrations reach over 3 ppbv
(+11%) and 0.4 μg m−3 (+10%) respectively for parts of
Borneo, with monthly mean increases of up to 6.5 ppbv (+25%) and
0.5 μg m−3 (+12%). Under the SRC scenario, Europe
experiences monthly mean changes of over 0.6 ppbv (+1%) and
0.1 μg m−3 (+5%) in June and July, with peak increases of
over 2 ppbv (+3%) and 0.5 μg m−3 (+8 %). That
appreciable regional atmospheric impacts result from low level planting
scenarios demonstrates the need to include changes in emissions of reactive
trace gases such as isoprene in life cycle assessments performed on potential
biofuel feedstocks. |
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