Data for: Field-based Measurements of Volcanic Ash Resuspension by Wind
Description
The enclosed data table includes experimental and particle characterization data for natural volcanic ash samples used as starting material in laboratory and field experiments simulating the wind-induced resuspension of volcanic ash particles. Full details of the experimental method can be found in related publication Del Bello et al. (2020). The table lists the experiments summary, including a description of the experimental settings and conditions, ash used, and type of data collected (video or sampled mass), and the relevant data regarding Force balance model (Merrison et al, 2007) fits to data, median grain size distribution of the deposits and the threshold friction velocity determined for each ash sample. Volcanic ash from different volcanoes are included in this dataset: i) andesitic ash from the Sakurajima volcano (Japan, sample name: SK), collected in January 2019 at 3 locations within 3 km from the source vent, from deposits pertaining to eruptions occurring in the days preceding their collection. ii) rhyolitic ash from the Cordon Caulle Volcano (Chile sample name: CC), collected in October 2019 at a location ~250 km away from the source vent (Argentinean Patagonian Steppe), from deposits pertaining to the eruption occurred in 2011(Dominguez et al., 2020). iii) phonolitic ash from Campi Flegrei Volcano (Italy sample name: CF), collected at a location ~15 km away from the inferred source vent, from the basal fallout layer of the ~10 ka old Pomici Principali eruptive unit (Di Vito et al., 1999). Full details on the experimental data on these samples are reported in (Del Bello et al., 2018). iii) basaltic-trachyandesite ash from Eyjafjallajokull Volcano (sample name: EY), collected in May 2010 at a location 7 km away from the source vent, during settling from the on-going eruptive plume (Taddeucci et al., 2011). Full details on the experimental data on these samples are reported in (Del Bello et al., 2018). For the SK and CC ash datasets, ash was sampled from the testbed where the field remobilization experiments were performed. For each experiment, a pre and a post experimental sample was collected and the grain size distribution data was obtained on the ash sampled before and after the field experimental runs. Grain size data were measured by laser diffraction granulometry (MALVERN ® 2000). For the CF and EY ash datasets, three different starting materials were obtained by hand sieving the natural samples into three particle size classes, <63 μm, (ii) 63–125 μm, and (iii) 125–250 μm, and the grain size distribution of the sample was measured by a multi-wavelength Separation Analyser (LUMIReader®, Detloff et al. (2006)).