Size distribution of particles emitted from grass fires in the Northern Territory,Australia |
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| Institution: | 1. Brawijaya University, Malang, Indonesia;2. International Laboratory for Air Quality and Health (ILAQH), Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia;3. Defence Science and Technology Organisation (DSTO), Australia;1. Research Center for Photovoltaic Technologies, National Institute of Advanced Industrial Science and Technology (AIST), Higashi 1-1-1, Tsukuba, Ibaraki 305-8565, Japan;2. Department of Innovative and Engineered Materials, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Nagatsuda 4259, Midori-ku, Yokohama, Kanagawa 226-8502, Japan;1. Department of Biology, University of Saskatchewan, 112 Campus Drive, Saskatoon, SK, Canada S7N 5E2;2. Canadian Rivers Institute, University of New Brunswick, NB, Canada;1. Laboratory for Animal Nutrition and Animal Product Quality (LANUPRO), Faculty of Bioscience Engineering, Ghent University, Proefhoevestraat 10, B-9090 Melle, Belgium;2. Food and Feed Quality Unit, Valorisation of Agricultural Products Department, Walloon Agricultural Research Centre, Chaussée de Namur, 24. B-5030 Gembloux, Belgium;3. Department of Mathematical Modeling, Statistics and Bioinformatics, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, B-9000 Ghent, Belgium |
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| Abstract: | This study investigated particle size distributions from the burning of several grass species, under controlled laboratory conditions, and also in the field, conducted during the dry season in the Northern Territory, Australia. The laboratory study simulated conditions such as burning phases and burning rate, and particle diameter differed depending on the burning conditions. Under fast burning conditions, smaller particles were produced with a diameter in the range of 30–60 nm, while larger particles, with a diameter between 60 and 210 nm, were produced during slow burning. The airborne field measurements of biomass particles found that under the boundary layer most of the early dry season (EDS) particles came from fresh smokes with a count median diameter (CMD) of 83±13 nm, and most of the late dry season (LDS) particles came from aged smokes with a CMD of 127±6 nm. Vertical profiles of CMD showed that smaller particles were found higher within the atmosphere. These measurements provide insight into the scientific understanding of the properties of biomass burning particles in the Northern Territory, Australia. |
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