The 2019 Raikoke volcanic eruption – Part 2: Particle-phase dispersion and concurrent wildfire smoke emissions
The 2019 Raikoke volcanic eruption – Part 2: Particle-phase dispersion and concurrent wildfire smoke emissions
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2019 年 Raikoke 火山喷发 – 第 2 部分：颗粒相扩散和同时发生的野火烟雾排放
DOI：
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发表时间：
2022
影响因子：
6.3
通讯作者：
J. Haywood
中科院分区：
文献类型：
--
作者：
Martin Osborne;J. de Leeuw;C. Witham;A. Schmidt;F. Beckett;N. Kristiansen;J. Buxmann;C. Saint;E. Welton;J. Fochesatto;André Gomes;U. Bundke;A. Petzold;F. Marenco;J. Haywood
抽象的。2019年6月27日至7月14日，英国（UK）拉曼激光雷达网络在对流层上部和平流层下部观测到气溶胶层。这些气溶胶层在6月下旬的到来引起了伦敦火山灰咨询中心（VAAC）的一些担忧，因为根据分散模拟，2019年6月21日Raikoke火山爆发的火山羽流预计要到7月初才会出现在英国。使用气象局数值大气扩散模拟环境（NAME）的扩散模拟，以及卫星和现场飞机观测的支持证据，我们表明平流层的早期到达不是由于Raikoke火山爆发的气溶胶，而是由于生物质燃烧烟雾气溶胶与加拿大阿尔伯塔的强烈森林火灾有关，发生在莱库克火山爆发前4天。我们使用观测和模型模拟来描述火山和森林火灾气溶胶云的分散，并估计最初的Raikoke灰气溶胶云包含约15 Tg的火山灰和森林火灾产生约0.2 Tg的生物质燃烧气溶胶。火山气溶胶云的业务监测是航空安全和NAME分散模拟协同作用的重要能力，具有去极化能力的激光雷达数据使英国气象局的科学家能够解释英国上空的各种气溶胶层并将材料归因于其来源。使用NAME可以识别6月27日到达英国的平流层观测到的生物质燃烧气溶胶，其特征在于粒子线性去极化率为9%，而单独使用激光雷达，后者可以被识别为早期到达的火山灰-硫酸盐混合气溶胶云。在所研究的情况下，由于浓度估计值较低，准确识别气溶胶层对伦敦VAAC内的决策过程几乎没有实质性影响。然而，我们的工作表明，如何使用分散建模与多个观测源，使我们能够创建一个更完整的描述大气气溶胶负载。
Abstract. Between 27 June and 14 July 2019 aerosol layers were observed by the United Kingdom (UK) Raman lidar network in the upper troposphere and lower stratosphere. The arrival of these aerosol layers in late June caused some concern within the London Volcanic Ash Advisory Centre (VAAC) as according to dispersion simulations the volcanic plume from the 21 June 2019 eruption of Raikoke was not expected over the UK until early July. Using dispersion simulations from the Met Office Numerical Atmospheric-dispersion Modelling Environment (NAME), and supporting evidence from satellite and in situ aircraft observations, we show that the early arrival of the stratospheric layers was not due to aerosols from the explosive eruption of the Raikoke volcano but due to biomass burning smoke aerosols associated with intense forest fires in Alberta, Canada, that occurred 4 d prior to the Raikoke eruption. We use the observations and model simulations to describe the dispersion of both the volcanic and forest fire aerosol clouds and estimate that the initial Raikoke ash aerosol cloud contained around 15 Tg of volcanic ash and that the forest fires produced around 0.2 Tg of biomass burning aerosol. The operational monitoring of volcanic aerosol clouds is a vital capability in terms of aviation safety and the synergy of NAME dispersion simulations, and lidar data with depolarising capabilities allowed scientists at the Met Office to interpret the various aerosol layers over the UK and attribute the material to their sources. The use of NAME allowed the identification of the observed stratospheric layers that reached the UK on 27 June as biomass burning aerosol, characterised by a particle linear depolarisation ratio of 9 %, whereas with the lidar alone the latter could have been identified as the early arrival of a volcanic ash–sulfate mixed aerosol cloud. In the case under study, given the low concentration estimates, the exact identification of the aerosol layers would have made little substantive difference to the decision-making process within the London VAAC. However, our work shows how the use of dispersion modelling together with multiple observation sources enabled us to create a more complete description of atmospheric aerosol loading.
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影响因子：
13.6
作者：
Jahl LG;Brubaker TA;Polen MJ;Jahn LG;Cain KP;Bowers BB;Fahy WD;Graves S;Sullivan RC
通讯作者：
Sullivan RC
影响因子：
5.2
作者：
H. Dacre;A. Grant;Natalie J. Harvey;David J. Thomson;H. Webster;F. Marenco
通讯作者：
H. Dacre;A. Grant;Natalie J. Harvey;David J. Thomson;H. Webster;F. Marenco
影响因子：
6.3
作者：
J. de Leeuw;A. Schmidt;C. Witham;N. Theys;Isabelle A. Taylor;R. Grainger;R. Pope;J. Haywood;Martin Osborne;N. Kristiansen
通讯作者：
J. de Leeuw;A. Schmidt;C. Witham;N. Theys;Isabelle A. Taylor;R. Grainger;R. Pope;J. Haywood;Martin Osborne;N. Kristiansen
2010 年埃亚菲亚德拉冰盖火山灰羽流的机载激光雷达观测
影响因子：
--
作者：
Marenco F
通讯作者：
Marenco F
影响因子：
6.3
作者：
Martin Osborne;F. Malavelle;M. Adam;J. Buxmann;J. Sugier;F. Marenco;J. Haywood
通讯作者：
Martin Osborne;F. Malavelle;M. Adam;J. Buxmann;J. Sugier;F. Marenco;J. Haywood