Characterization of PM(2.5) collected during broadcast and slash-pile prescribed burns of predominately ponderosa pine forests in northern Arizona.
Characterization of PM(2.5) collected during broadcast and slash-pile prescribed burns of predominately ponderosa pine forests in northern Arizona.
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DOI：
10.1016/j.atmosenv.2011.01.051
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发表时间：
2011-04
影响因子：
5
通讯作者：
Herckes, Pierre
中科院分区：
文献类型：
--
作者：
Robinson, Mann S.;Zhao, Min;Zack, Lindsay;Brindley, Christine;Portz, Lillian;Quarterman, Matthew;Long, Xiufen;Herckes, Pierre
关键词：
规定的燃烧，结合机械间伐，是一个成功的方法，减少沉重的燃料负荷从森林地面，从而降低灾难性野火的风险。然而，受控火灾的一个不良后果是产生细颗粒物或PM2.5（空气动力学直径≤2.5 µm的颗粒）。木材烟雾颗粒数据从21个规定的烧伤，包括结果从广播和斜线堆烧伤。所有的PM2.5样品都是在第1天（点火）或第2天原位收集的。分析样品的质量，多环芳烃（PAHs），无机元素，有机碳（OC），元素碳（EC）。结果表明，低强度阴燃火灾的特点。PM2.5浓度在523至8357 µg m−3之间，第1天较高。多环芳烃的重量百分比（19种）在刀耕火种中（0.21 ± 0.08%OC）高于散烧（0.07 ± 0.03%OC）。主要元素为K、Cl、S和Si。OC和EC值平均值分别为66 ± 7和2.8 ± 1.4%PM2.5，所有研究的烧伤，与文献值阴燃火灾。
Prescribed burning, in combination with mechanical thinning, is a successful method for reducing heavy fuel loads from forest floors and thereby lowering the risk of catastrophic wildfire. However, an undesirable consequence of managed fire is the production of fine particulate matter or PM2.5 (particles ≤2.5 µm in aerodynamic diameter). Wood-smoke particulate data from 21 prescribed burns are described, including results from broadcast and slash-pile burns. All PM2.5 samples were collected in situ on day 1 (ignition) or day 2. Samples were analyzed for mass, polycyclic aromatic hydrocarbons (PAHs), inorganic elements, organic carbon (OC), and elemental carbon (EC). Results were characteristic of low intensity, smoldering fires. PM2.5 concentrations varied from 523 to 8357 µg m−3 and were higher on day 1. PAH weight percents (19 PAHs) were higher in slash-pile burns (0.21 ± 0.08% OC) than broadcast burns (0.07 ± 0.03% OC). The major elements were K, Cl, S, and Si. OC and EC values averaged 66 ± 7 and 2.8 ± 1.4% PM2.5, respectively, for all burns studied, in good agreement with literature values for smoldering fires.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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