Hazard assessment of far-range volcanic ash dispersal from a violent Strombolian eruption at Somma-Vesuvius volcano, Naples, Italy: implications on civil aviation

Sulpizio, Roberto; Folch, Arnau; Costa, Antonio; Scaini, Chiara; Dellino, Pierfrancesco

doi:10.1007/s00445-012-0656-3

Cited by 53 publications

(40 citation statements)

References 45 publications

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“…However, although the Weibull distribution has stronger physical basis (e.g. Tenchov and Yanev, 1986;Brown and Wohletz, 1995), the lognormal distribution is very practical and easy to use, especially because tephra grainsize data obtained by sieving are directly expressed in term of Φ-units. Lognormal distributions of tephra deposits are commonly described using the parameters MdΦ and sorting representing the Φ-class associated with 50 wt% of the total mass (coinciding with the mode in case of Gaussian distribution) and a measure of size spread, respectively (Inman, 1952).…”

Section: Modelling the Reconstructed Tgsdmentioning

confidence: 99%

Assessing tephra total grain-size distribution: Insights from field data analysis

Costa

Pioli

Bonadonna

2016

Earth and Planetary Science Letters

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Section: Modelling the Reconstructed Tgsdmentioning

confidence: 99%

Assessing tephra total grain-size distribution: Insights from field data analysis

Costa

Pioli

Bonadonna

2016

Earth and Planetary Science Letters

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“…Proximal to the vent, ash fallout is also heavily affected by volcanological effects such as changes in the eruption dynamics and sedimentation regime (Bonadonna and Costa, 2013), ash aggregation (i.e. the joining of airborne ash particles) within the volcanic plume that affects the total GSD of the ash (Cornell et al, 1983;Bonadonna and Houghton, 2005;Sulpizio et al, 2012) and can both enhance the sedimentation of light ash (Brown et al, 2012) and impede the sedimentation of heavier ash via rafting (Bagheri et al, 2016), as well as downwards propagating instabilities that arise from local differences in ash concentration (Manzella et al, 2015;Scollo et al, 2017). These effects act in tandem with the meteorological fields and topography, with the final ash fallout patterns decided by the complex interplay of all these factors.…”

Section: Accumulated Ashfall Characteristicsmentioning

confidence: 99%

Statistical analysis of dispersal and deposition patterns of volcanic emissions from Mt. Sakurajima, Japan

Poulidis

Takemi

Shimizu

et al. 2018

Atmospheric Environment

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A B S T R A C TWith the eruption of Eyjafjallajökull (Iceland) in 2010, interest in the transport of volcanic ash after moderate to major eruptions has increased with regards to both the physical and the emergency hazard management aspects. However, there remain significant gaps in the understanding of the long-term behaviour of emissions from volcanoes with long periods of activity. Mt. Sakurajima (Japan) provides us with a rare opportunity to study such activity, due to its eruptive behaviour and dense observation network. In the 6-year period from 2009 to 2015, the volcano was erupting at an almost constant rate introducing approximately 500 kt of ash per month to the atmosphere. The long-term characteristics of the transport and deposition of ash and SO 2 in the area surrounding the volcano are studied here using daily surface observations of suspended particulate matter (SPM) and SO 2 and monthly ashfall values.Results reveal different dispersal patterns for SO 2 and volcanic ash, suggesting volcanic emissions' separation in the long-term. Peak SO 2 concentrations at different locations on the volcano vary up to 2 orders of magnitude and decrease steeply with distance. Airborne volcanic ash increases SPM concentrations uniformly across the area surrounding the volcano, with distance from the vent having a secondary effect. During the period studied here, the influence of volcanic emissions was identifiable both in SO 2 and SPM concentrations which were, at times, over the recommended exposure limits defined by the Japanese government, European Union and the World Health Organisation.Depositional patterns of volcanic ash exhibit elements of seasonality, consistent with previous studies. Climatological and topographic effects are suspected to impact the deposition of volcanic ash away from the vent: for sampling stations located close to complex topographical elements, sharp changes in the deposition patterns were observed, with ash deposits for neighbouring stations as close as 5 km differing as much as an order of magnitude. Despite these effects, deposition was sufficiently approximated by an inverse power law relationship, the fidelity of which depended on the distance from the vent: for proximal to intermediate areas (20 km), errors decrease with longer accumulation periods (tested here for 1-72 months), while the opposite was seen for deposition in distal areas (>20 km).

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“…따라서 대규모 화산 분화에 의 한 화산재 방출은 단기간 내에 급격한 대기질 악화 와 항공교통 마비를 야기시키고 경제적 피해 또한 막대하다 (Millet and Casadevall, 2000;Gasteiger et al, 2011;Sulpizio et al, 2012;Lee et al, 2012;Yu et al, 2013). 또한 대류권 및 성층권내에서 화산재의 이동 및 침적과정을 통하여 복사에너지의 변화를 야 기하고 이러한 복사 수지의 변화는 궁극적으로 지구 규모의 기후 변화에 영향을 준다 (Mishchenko et al, 2007;Lee and Jang, 2014).…”

Section: 서 론unclassified

Numerical Simulation of Volcanic Ash Dispersion and Deposition during 2011 Eruption of Mt. Kirishima

Lee¹,

Jang²,

Yun³

2014

Journal of the Korean earth science society

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To analyze the characteristics of deposition and dispersion of volcanic ash emitted from Mt. Kirishima on January 26, 2011, several numerical simulations were carried out by using the numerical models including Weather and Research Forecast (WRF) and FLEXPART. The dispersion of ash located under 1 km high tends to be concentrated along the prevailing wind direction on January 26 2011. On the other hand, volcanic ash released on the following day spreads to Kirishima bay due to the intensified high pressure air mass in southern Kyushu. When Siberian air mass was intensified January 26, 2011, the deposition of volcanic ash is concentrated restrictedly in the narrow area along the wind direction of the downwind side of Mt. Kirishima. The development of high pressure air mass over the eruption area tends to induce the intensified horizontal diffusion of volcanic ash. Since the estimated deposition of volcanic ash is agreed well with observed values, the proposed numerical simulation is reasonable to use the assessment on the behavior of volcanic ash.

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Hazard assessment of far-range volcanic ash dispersal from a violent Strombolian eruption at Somma-Vesuvius volcano, Naples, Italy: implications on civil aviation

Cited by 53 publications

References 45 publications

Assessing tephra total grain-size distribution: Insights from field data analysis

Assessing tephra total grain-size distribution: Insights from field data analysis

Statistical analysis of dispersal and deposition patterns of volcanic emissions from Mt. Sakurajima, Japan

Numerical Simulation of Volcanic Ash Dispersion and Deposition during 2011 Eruption of Mt. Kirishima

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