Data for: Field-based Measurements of Volcanic Ash Resuspension by Wind

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)).

所附数据表中包含了用于模拟火山灰颗粒风力扬尘的实验室和现场实验的起始材料——天然火山灰样品的实验和颗粒表征数据。有关实验方法的详细信息，请参阅相关出版物Del Bello等人（2020年）。表中列出了实验概要，包括实验设置和条件、使用的火山灰以及收集的数据类型（视频或采样质量），以及与数据拟合的力平衡模型（Merrison等人，2007年）、沉积物的中值粒径分布以及为每个火山灰样品确定的阈值摩擦风速的相关数据。

本数据集包含了来自不同火山的多份火山灰样本：
i) 来自樱岛火山（日本，样本名称：SK）的安山质火山灰，于2019年1月在距源喷口3公里范围内的3个地点收集，这些沉积物与采集前的几天内发生的喷发有关。
i) 来自科尔多恩·卡乌莱火山（智利，样本名称：CC）的流纹质火山灰，于2019年10月在距源喷口约250公里处的阿根廷巴塔哥尼亚草原收集，这些沉积物与2011年发生的喷发有关（Dominguez等人，2020年）。
i) 来自坎皮费雷里火山（意大利，样本名称：CF）的响岩质火山灰，在距推断的源喷口约15公里的地点收集，来自约1万年前的Pomici Principali喷发单元的基底层（Di Vito等人，1999年）。关于这些样品的实验数据的详细信息，请参阅（Del Bello等人，2018年）。
i) 来自艾雅法拉约火山（样本名称：EY）的玄武质-辉安岩质火山灰，于2010年5月在距源喷口7公里处收集，在持续喷发的火山羽流沉降过程中（Taddeucci等人，2011年）。关于这些样品的实验数据的详细信息，请参阅（Del Bello等人，2018年）。

对于SK和CC火山灰数据集，从进行现场再活化实验的测试台上采样火山灰。对于每个实验，都收集了实验前后的样品，并获得了实验前后采样的火山灰的粒径分布数据。粒径数据是通过激光衍射粒度计（MALVERN® 2000）测量的。

对于CF和EY火山灰数据集，通过手工筛选天然样本成三个粒径等级（<63 μm、63–125 μm和125–250 μm）获得三种不同的起始材料，并通过多波长分离分析仪（LUMIReader®，Detloff等人，2006年）测量了样品的粒径分布。