Towards a satellite-based approach to measure eruptive volumes at Mt. Etna using Pleiades datasets
Towards a satellite-based approach to measure eruptive volumes at Mt. Etna using Pleiades datasets
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利用 Pleiades 数据集采用基于卫星的方法来测量埃特纳火山的喷发量
DOI：
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发表时间：
2020
影响因子：
3.5
通讯作者：
F. Giannone
中科院分区：
文献类型：
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作者：
C. Proietti;M. Coltelli;M. Marsella;M. Martino;Silvia Scifoni;F. Giannone
迄今为止，只对同时发生的爆炸和喷涌活动期间的熔岩和火山灰进行了一些高精度的研究。我们通过分析高空间分辨率卫星光学图像的独特且均匀的多时数据集来进行此类测量。数字高程模型（dem）和正射像（分别具有1和0.5 m像素的分辨率）是从2011年至2016年期间从埃特纳火山Pleiades三立体对中提取的。在此期间，频繁的喷发和爆炸事件形成了熔岩流场，并形成了新的东南火山口火山碎屑锥。通过将昴宿星团的DEM与2007年更新的航空摄影测量DEM进行比较，测量了熔岩场和近端火山碎屑沉积物的体积。所有远端沉积物的体积都是用埃特纳火山熔岩喷泉文献中的熔岩和熔岩分区来估计的。熔岩和火山熔岩的致密岩石当量体积总计为248.4±2.1 × 10.6 m³，对应于分析的8年期间（2008年5月至2016年5月）的平均喷发速率为0.98 m³/s， 520天活动的多事件喷发速率为5.53 m³/s。高空间分辨率卫星dem的多时相分析成功应用于监测良好的埃特纳火山，表明高空间分辨率卫星图像的任务处理对于在强烈的火山活动（频繁和重叠的喷发事件）期间快速有效地监测至关重要。这种方法可用于监测难以通过重复实地调查进行研究的偏远或危险火山。
Only a few high precision studies of lava and tephra during simultaneous explosive and effusive activity have so far been undertaken. We carried out such measurements by analysis of a unique and homogeneous multi-temporal dataset of high-spatial resolution satellite optical images. Digital Elevation Models (DEMs) and orthophotos (with 1- and 0.5-m-pixel resolutions respectively) were extracted from six specifically tasked Pleiades tri-stereo pairs of Mt. Etna volcano, between 2011 and 2016. During this period, frequent effusive and explosive events formed lava flow fields and built up the new south-east crater pyroclastic cone. The volumes of lava fields and proximal pyroclastic deposits were measured by comparing the Pleiades DEMs with an aerial photogrammetric DEM updated in 2007. The volumes of all distal deposits were estimated using lava and tephra partitioning from the literature for an Etnean lava fountain. The dense rock equivalent volume of lava and tephra, calculated to be 248.4 ± 2.1 × 10 6 m 3 in total, corresponds to an average output rate of 0.98 m 3 /s over the analysed 8-year period (May 2008–May 2016) and to a multi-event eruption rate of 5.53 m 3 /s for 520 days of activity. The multi-temporal analysis of high-spatial resolution satellite DEMs, here successfully applied to the well-monitored Etna volcano, demonstrated that the tasking of high-spatial resolution satellite images is crucial for fast and effective monitoring during intense volcanic activity (frequent and overlapping eruptive events). This methodology could be used for the monitoring of remote or hazardous volcanoes that are difficult to study by means of repeated field surveys.
通过现场测量和卫星遥感绘制和测量厄瓜多尔雷文塔多火山 2002 年至 2009 年的熔岩量
影响因子：
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作者：
Naranjo M
通讯作者：
Naranjo M