Atmospheric aging enhances the ice nucleation ability of biomass-burning aerosol

Jahl, Lydia G.; Brubaker, Thomas A.; Polen, Michael J; Jahn, Leif G.; Cain, Kerrigan P.; Bowers, Bailey B.; Fahy, William D.; Graves, Sara; Sullivan, R. C.

doi:10.1126/sciadv.abd3440

Cited by 41 publications

(50 citation statements)

References 75 publications

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“…Possible explanations are that some smoke layers contain irregularly shaped soil and dust particles lofted at the same time by the strong convection associated with wildfires, or alternatively that the aggregation of small soot particles as part of the ageing process can produce significantly non-spherical agglomerations (e.g. Jahl et al, 2021). It is possible that a similar variation ex-ists in the stratosphere.…”

Section: Regional Analysis and Interpretation Of Materials Over The Ukmentioning

confidence: 99%

The 2019 Raikoke volcanic eruption – Part 2: Particle-phase dispersion and concurrent wildfire smoke emissions

et al. 2022

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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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Section: Regional Analysis and Interpretation Of Materials Over The Ukmentioning

confidence: 99%

The 2019 Raikoke volcanic eruption – Part 2: Particle-phase dispersion and concurrent wildfire smoke emissions

et al. 2022

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“…While previous studies on individual silicate minerals or mineral dust proxies oen show small losses of INA in acid and sometimes report changes in INA from suspension in H 2 O, 24,25,51,[53][54][55]96,112,115 the 10 C difference between the freezing spectra of the non-aged and water-aged FUE ash is striking and the non-monotonicity of its INA with aging duration in H 2 O is unprecedented. Clearly, more research is required to understand the complexities of the effects of chemical alteration on INA, especially for less-studied minerals such as pyroxenes and for multicomponent materials like volcanic ash, natural mineral dust, and biomass-burning aerosol 117,118 that are present in the atmosphere.…”

Section: Discussionmentioning

confidence: 99%

Volcanic ash ice nucleation activity is variably reduced by aging in water and sulfuric acid: the effects of leaching, dissolution, and precipitation

Fahy

Maters

Giese-Miranda

et al. 2022

Environ. Sci.: Atmos.

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“…Biomass burning is a major source of atmospheric organic aerosols, [7][8][9] which emits a wide variety of gases, namely semi-volatile organic compounds (SVOCs), that have major implications on atmospheric chemistry. 9 Catechol and guaiacol are two phenolic SVOCs readily released from the combustion of biogenic sources.…”

Section: 6mentioning

confidence: 99%

Hygroscopicity of polycatechol and polyguaiacol secondary organic aerosol in sub- and supersaturated water vapor environments

Malek

Gohil

Al‐Abadleh

et al. 2022

Environ. Sci.: Atmos.

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Atmospheric aging enhances the ice nucleation ability of biomass-burning aerosol

Cited by 41 publications

References 75 publications

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

Volcanic ash ice nucleation activity is variably reduced by aging in water and sulfuric acid: the effects of leaching, dissolution, and precipitation

Hygroscopicity of polycatechol and polyguaiacol secondary organic aerosol in sub- and supersaturated water vapor environments

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