The morphological evolution of the Sciara del Fuoco since 1868: reconstructing the effusive activity at Stromboli volcano
The morphological evolution of the Sciara del Fuoco since 1868: reconstructing the effusive activity at Stromboli volcano
复制标题
1868 年以来 Sciara del Fuoco 的形态演变：重建斯特龙博利火山的喷发活动
作者：
M. Marsella;P. Baldi;M. Coltelli;M. Fabris
通过对1868年和1937年编制的历史等高线地图进行数字化，并对1954年至2009年进行的航空测量数据进行处理，根据数字高程模型和正射影像形成的时间序列数据集，描述了Dromboli Sciara del Fuoco的形态演变。所有地图都在相同的参考系统中共同登记，并用于建立Sciara del Fuoco斜坡形态变化的量化重建。这些变化主要与许多熔岩流侵位及其连续侵蚀有关。对1937至2001年间发生的几次热流事件中，福科山地下部分形成的熔岩场的面积和体积进行了比较定量的分析，其中一些以前从未进行过评估。分析的结果限制了对斯特龙博利火山最近喷发活动的演化和规模的解释。尽管由于观察期间隔很大而存在一些不确定性，但结果综合了所有现有的地形知识，有助于理解斯特龙博利火山最近喷发喷发方式的主要特征。
The morphological evolution of the Sciara del Fuoco, Stromboli, is described from a time series dataset formed by Digital Elevation Models and orthophotos derived by digitising historical contour maps compiled in 1868 and 1937 and by processing data from aerial surveys carried out between 1954 and 2009. All maps were co-registered in the same reference system and used to build a quantitative reconstruction of the morphological changes of the Sciara del Fuoco slope. The changes mainly relate to the emplacement of many lava flows and their successive erosion. A comparative quantitative analysis yields estimates of areas and volumes of the lava fields formed on the sub-aerial part of the Sciara del Fuoco during a number of effusive events between 1937 and 2001, some of them never assessed before. The results of the analysis constrain the interpretation of the evolution and the magnitude of the recent effusive activity at the Stromboli volcano. Despite some uncertainties due to widely spaced observation periods, the results integrate all available topographic knowledge and contribute to an understanding of the main characteristics of the recent effusive eruptive styles at Stromboli volcano.