Mercury storage in surface soils in a central Washington forest and estimated release during the 2001 Rex Creek Fire
Mercury storage in surface soils in a central Washington forest and estimated release during the 2001 Rex Creek Fire
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DOI：
10.1016/j.scitotenv.2008.05.043
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发表时间：
2008-10-01
影响因子：
9.8
通讯作者：
Keeler, Gerald J.
中科院分区：
文献类型：
--
作者：
Biswas, Abir;Blum, Joel D.;Keeler, Gerald J.
最近的调查表明，野火将大量汞(Hg)从陆地生态系统输送到大气。然而，关于地理位置、气候、林龄和树种如何影响燃烧前汞的积累和燃烧过程中的损失，人们知之甚少。2001年夏天在东部喀斯喀特山脉(美国华盛顿州)雷克斯克里克大火期间烧毁的场地和邻近未烧毁的对照场地收集的土壤岩心表明，雷克斯克里克大火期间土壤中汞的平均损失为6.7(+/-2.5)克汞公顷(-1)。这种基于土壤剖面的汞释放估计高于之前基于空中测量烟雾中汞和一氧化碳浓度的同一场火灾的估计。这项研究对全球估计森林中汞的储量和在野火期间释放到大气中具有重要意义。(C)2008爱思唯尔B.V.保留所有权利。
Recent investigations indicate that wildfires provide a significant flux of mercury (Hg) from terrestrial ecosystems to the atmosphere. However, little is known about how geographic location, climate, stand age, and tree species affect Hg accumulation prior to burning and loss during burning. Soil cores collected in sites burned during the summer 2001 Rex Creek Fire in the eastern Cascade Mountains (Washington State, USA) and in adjacent unburned control sites indicate that Hg loss from soils during the Rex Creek Fire averaged 6.7 (+/- 2.5) g Hg ha(-1). This soil profile-based estimate of Hg release is higher than a previous estimate for the same fire based on airborne measurements of Hg and CO concentrations in smoke. This study has implications for global estimates of Hg storage in forests and release to the atmosphere during wildfires. (C) 2008 Elsevier B.V. All rights reserved.