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Numerical simulation of tephra transport and deposition of the 1982 El Chichon eruption and implications for hazard assessment

机译:1982年El Chichon喷发的提夫拉运移和沉积的数值模拟及其对危害评估的启示

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摘要

El Chichon volcano, Chiapas, Mexico, erupted explosively on March 29th, 1982, after a repose period of about 550 years. Amongst ten eruptive episodes documented between March 29th and April 4th, only the three that occurred on March 29th and April 4th produced significant pyroclastic tephra deposits. Here we use an-alytical (HAZMAP) and numerical (FALL3D) tephra transport models to reconstruct the deposits and the at-mospheric plume dispersal associated with the three main fallout units of the 1982 eruption. On the basis of such a reconstruction, we produce hazard maps of tephra fallout associated to a Plinian eruption and discuss the implications of such a severe eruption scenario.
机译:在大约550年的休止期后,墨西哥恰帕斯州的奇琴火山爆发于1982年3月29日爆发。在3月29日至4月4日记录的十次火山爆发事件中,只有3月29日至4月4日发生的三个爆发事件产生了大量的火山碎屑特弗拉沉积物。在这里,我们使用解析(HAZMAP)和数值(FALL3D)的特菲拉运移模型来重建与1982年喷发的三个主要沉降单元相关的沉积物和大气羽流扩散。在这种重建的基础上,我们绘制了与一次普林尼火山喷发有关的特非拉辐射尘的危害图,并讨论了这种严重喷发情景的影响。

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  • 来源
    《Journal of Volcanology and Geothermal Research》 |2012年第15期|p.39-49|共11页
  • 作者单位

    Centra de Geociencias, Universidad National Autonoma de Mexico, Campus Juriquilla, 76230 Queretaro, Mexico;

    Environmental Systems Stience Centre, University of Reading RG 6A1, UK and Istituto Nazionale di Ceofisica e Vulcanologia, Sezione 'Osservatorio Vesuviano', via Diocleziano 328, Napoli,Italy;

    Barcelona Supercomputing Center-Centro National de Supercomputacidn, Barcelona, Spain;

    Istituto Nazionale di Geofisica e Vulcanologia, Sezione 'Osservatorio Vesuviano', via Diocleziano 328, Napoli, Italy;

    Centra de Geociencias, Universidad National Autonoma de Mexico, Campus Juriquilla, 76230 Queretaro, Mexico;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fallout deposit; 1982 El chichon eruption; HAZMAP; FALL3D; hazard assessment;

    机译:余尘存款;1982年厄尔尼诺奇琴爆发HAZMAP;FALL3D;危害评估;

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