Aerosol formation in basaltic lava fountaining: Eyjafjallajökull volcano, Iceland
Aerosol formation in basaltic lava fountaining: Eyjafjallajökull volcano, Iceland
复制标题
玄武岩熔岩喷泉中气溶胶的形成：冰岛埃亚菲亚德拉冰盖火山
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
C. Oppenheimer
中科院分区：
文献类型：
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作者：
E. Ilyinskaya;R. Martin;C. Oppenheimer
[1]埃亚菲亚德拉冰盖火山喷发的玄武岩熔岩（2010年3月至4月）产生了一个低海拔、灰贫乏的羽流。为了研究近源气溶胶（0.4 μm）的形成和形态，我们测量了气溶胶颗粒（使用级联撞击器和过滤器采样）、气体（使用过滤器采样）和由火山渣和外部水清除的挥发性物质的组成，其组成主要是氯化物而不是硫酸盐。我们使用了两个热力学平衡模型（E-AIM和HSC Chemistry v5.1）来表明，通过HCl气体冷凝形成的颗粒Cl−比SO2氧化为SO 42 −对环境温度的变化更敏感，因此气溶胶颗粒中的低SO 42 −/Cl−比率是寒冷气候下火山排放的特征。现场测量表明，通风口内SO2转化为SO 42 −的效率随着爆炸性的降低而提高。吸附在火山渣表面的挥发物具有明显高于气溶胶样品的SO 42 −/卤素摩尔比。这些差异的几个潜在的解释进行了讨论。
[1] A short-lived episode of basaltic lava fountaining at Eyjafjallajokull volcano (March – April 2010) produced a low-altitude, ash-poor plume. We measured the composition of aerosol particles (sampled using a cascade impactor and filter packs), gases (sampled using filter packs), and volatile species scavenged by scoria and external water in order to investigate the formation and speciation of near-source aerosol ( 0.4 μm), and its composition was dominated by chloride rather than sulfate. We used two thermodynamic equilibrium models (E-AIM and HSC Chemistry v5.1) to show that the formation of particulate Cl− by condensation of HCl gas is more responsive to changes in ambient temperature than the oxidation of SO2 to SO42−, so that a low SO42−/Cl− ratio in aerosol particles is characteristic of volcanic emissions in cold climates. Field measurements suggested that the efficiency of SO2 to SO42− conversion inside the vent increased with lower explosivity. Volatiles adsorbed on the surface of scoria had significantly higher SO42−/halogen molar ratios than the aerosol samples. Several potential explanations for these differences are discussed.
影响因子：
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作者：
R. S. Martin;T. Mather;D. Pyle;M. Power;V. Tsanev;C. Oppenheimer;A. G. Allen;C. Horwell;E. P. Ward
通讯作者：
R. S. Martin;T. Mather;D. Pyle;M. Power;V. Tsanev;C. Oppenheimer;A. G. Allen;C. Horwell;E. P. Ward
尼加拉瓜马萨亚火山微量元素的高分辨率尺寸分布和排放通量
影响因子：
3.4
作者：
Martin R
通讯作者：
Martin R
影响因子：
3.9
作者：
Edmonds, Marie;Gerlach, Terrence M.;Herd, Richard A.
通讯作者：
Herd, Richard A.