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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Spatio-temporal reconstruction of lahars on the southern slopes of Colima volcano, Mexico - A dendrogeomorphic approach
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Spatio-temporal reconstruction of lahars on the southern slopes of Colima volcano, Mexico - A dendrogeomorphic approach

机译：墨西哥科利马火山南坡上的拉哈斯时空重建-树状地貌方法

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摘要

Historical records of lahar occurrence and distribution are typically scarce in volcanic environments, even more so if they occur outside of human settlements. In the context of hazard assessment and process understanding, documenting their temporal frequency and drivers of activity might be crucial. On forested volcanoes, lahars may significantly damage trees along their flow paths, and sometimes even eliminate entire forest stands. This study is based on growth disturbances in trees affected by lahars (ⅰ) to assess the potential of dendrogeomorphic techniques in lahar research and (ⅱ) to analyze the temporal frequency and spatial patterns of lahars at Montegrande and Arena, two of the most active of the ephemeral streams on the southern sector of Colima volcano. A total of 78 Pinus leiophylla live trees were sampled along the ravines, yielding evidence for 20 lahar events after the AD 1913 eruption, adding seven events to the historic records. Although the number of lahars reconstructed with tree-ring records can only be considered as a minimum frequency, the method clearly improves the local lahar chronology. Despite the scarcity of meteorological records at the study sites, the timing of reconstructed lahars points to heavy rainfalls after explosive activity as the main driver of events.
机译：在火山环境中，拉哈事件发生和分布的历史记录通常很少，如果发生在人类住区之外，则更是如此。在危害评估和过程理解的背景下，记录其时间频率和活动驱动因素可能至关重要。在有森林的火山上，泻湖可能会严重破坏沿其树木流动的树木，有时甚至会破坏整个森林林分。这项研究是基于受Lahars影响的树木生长扰动（ⅰ）评估lahar研究中树状地貌技术的潜力，以及（ⅱ）分析蒙特哥兰德和阿雷纳（这两个最活跃的地区）Lahars的时间频率和空间格局。科利马火山南部的短暂河流。沿山沟共采集了78棵松叶锦松活树，为公元1913年喷发后发生20次拉哈尔事件提供了证据，为历史记录增加了7起事件。尽管仅用树年轮记录重建的拉哈尔数量可被视为最低频率，但该方法明显改善了当地拉哈尔年代。尽管研究地点的气象记录稀少，但重建爆炸事件的时机仍然表明，爆炸活动是造成这一事件的主要因素，造成了大雨。

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    Osvaldo Franco-Ramos; Markus Stoffel; Lorenzo Vazquez-Selem; Lucia Capra;

  • 作者单位

    Institute de Geografia, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Coyoacan, 04510, Mexico D.F. Mexico;

    Dendrolab.ch, Institute of Geological Sciences, University of Bern, Baltzerstrasse 1 +3, CH-3012 Bern, Switzerland,Climatic Change and Climate Impacts, Institute for Environmental Sciences, University of Geneva, 7 route de Drize, CH-1227 Carouge, Switzerland;

    Institute de Geografia, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Coyoacan, 04510, Mexico D.F. Mexico;

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

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  • 正文语种 eng
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  • 关键词

    Dendrogeomorphology; Colima volcano; Lahars; Tree rings; Pinus leiophylla;

    机译：树突形态科利马火山;拉哈斯年轮;松叶松;

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