x射线显微断层摄影揭示了火山灰聚集体的内部特征。

IF 8.9 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Communications Earth & Environment Pub Date : 2025-01-01 Epub Date: 2025-07-03 DOI:10.1038/s43247-025-02378-y
Pietro Gabellini, Eduardo Rossi, Raffaello Cioni, Marco Pistolesi, Lukas P Baumgartner, Costanza Bonadonna
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引用次数: 0

摘要

火山灰聚集发生在大气中的运输过程中,当单个火山灰颗粒碰撞并粘在一起时。它会显著影响火山灰在大气中的停留时间,对危害评估和火山灰扩散预测产生重大影响。尽管如此,聚集过程仍然没有得到充分的参数化,这主要是由于大多数聚集类型的保存潜力低。我们在这里首次详细介绍了主要骨料类型的结构和形态特征,结合了创新的现场收集策略,该策略允许在沉积时保留原始骨料结构,再加上x射线显微断层扫描。由此产生的观测结果加上天气信息,使得脆弱的火山灰团和难以捉摸的核心火山灰颗粒(cAP1s)的结构得以完全解决,它们的起源也得到了更好的描述。收集到的数据集代表了对主要聚集物类别的综合表征的根本性进展,这是准确解释和模拟火山灰聚集和扩散过程的关键。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
X-Ray micro-tomography unveils the internal features of volcanic ash aggregates.

Volcanic ash aggregation occurs during transport in the atmosphere when individual ash particles collide and stick together. It significantly impacts ash residence time in the atmosphere, with major consequences for hazard assessment and ash dispersal forecasts. Nonetheless, aggregation processes are still not adequately parametrized, mostly due to the low preservation potential of most aggregate types. We present here the first, detailed structural and morphological characterization of the major aggregate types, combining an innovative field collection strategy, which allows for the original aggregate structure to be preserved at deposition, coupled to X-Ray micro-tomography. Resulting observations together with weather information, allowed for the structure of fragile ash clusters and of the elusive cored Ash Pellets (cAP1s) to be fully resolved and their genesis to be better described. The collected dataset represents a fundamental advancement towards a comprehensive characterization of the principal aggregate categories, which is key to accurately interpreting and modelling the process of volcanic ash aggregation and dispersal.

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来源期刊
Communications Earth & Environment
Communications Earth & Environment Earth and Planetary Sciences-General Earth and Planetary Sciences
CiteScore
8.60
自引率
2.50%
发文量
269
审稿时长
26 weeks
期刊介绍: Communications Earth & Environment is an open access journal from Nature Portfolio publishing high-quality research, reviews and commentary in all areas of the Earth, environmental and planetary sciences. Research papers published by the journal represent significant advances that bring new insight to a specialized area in Earth science, planetary science or environmental science. Communications Earth & Environment has a 2-year impact factor of 7.9 (2022 Journal Citation Reports®). Articles published in the journal in 2022 were downloaded 1,412,858 times. Median time from submission to the first editorial decision is 8 days.
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