globalchange  > 气候减缓与适应
DOI: 10.1029/2017JD027827
Scopus ID: 2-s2.0-85047493930
Fine Particle Emissions From Tropical Peat Fires Decrease Rapidly With Time Since Ignition
Author: Roulston C.; Paton-Walsh C.; Smith T.E.L.; Guérette É.-A.; Evers S.; Yule C.M.; Rein G.; Van der Werf G.R.
Source Publication: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
Publishing Year: 2018
Volume: 123, Issue:10
pages begin: 5607
pages end: 5617
Language: 英语
Keyword: emissions ; fire ; peat ; PM2.5
English Abstract: Southeast Asia experiences frequent fires in fuel-rich tropical peatlands, leading to extreme episodes of regional haze with high concentrations of fine particulate matter (PM2.5) impacting human health. In a study published recently, the first field measurements of PM2.5 emission factors for tropical peat fires showed larger emissions than from other fuel types. Here we report even higher PM2.5 emission factors, measured at newly ignited peat fires in Malaysia, suggesting that current estimates of fine particulate emissions from peat fires may be underestimated by a factor of 3 or more. In addition, we use both field and laboratory measurements of burning peat to provide the first mechanistic explanation for the high variability in PM2.5 emission factors, demonstrating that buildup of a surface ash layer causes the emissions of PM2.5 to decrease as the peat fire progresses. This finding implies that peat fires are more hazardous (in terms of aerosol emissions) when first ignited than when still burning many days later. Varying emission factors for PM2.5 also have implications for our ability to correctly model the climate and air quality impacts downwind of the peat fires. For modelers able to implement a time-varying emission factor, we recommend an emission factor for PM2.5 from newly ignited tropical peat fires of 58 g of PM2.5 per kilogram of dry fuel consumed (g/kg), reducing exponentially at a rate of 9%/day. If the age of the fire is unknown or only a single value may be used, we recommend an average value of 24 g/kg. ©2018. The Authors.
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被引频次[WOS]:14   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:气候减缓与适应

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Affiliation: Centre for Atmospheric Chemistry, University of Wollongong, Wollongong, NSW, Australia; Department of Geography, King's College London, London, United Kingdom; Department of Geography and Environment, London School of Economics and Political Science, London, United Kingdom; School of Natural Sciences and Psychology, Liverpool John Moores University, Liverpool, United Kingdom; School of Biosciences, University of Nottingham Malaysia Campus, Malaysia; School of Science, Monash University, Malaysia Campus, Malaysia; School of Science and Engineering, University of the Sunshine Coast, Australia; Department of Mechanical Engineering, Imperial College London, London, United Kingdom; Department of Earth Sciences, Faculty of Science, Vrije Universiteit, Amsterdam, Netherlands

Recommended Citation:
Roulston C.,Paton-Walsh C.,Smith T.E.L.,et al. Fine Particle Emissions From Tropical Peat Fires Decrease Rapidly With Time Since Ignition[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(10)
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