Remote observations of eruptive clouds and surface thermal activity during the 2009 eruption of Redoubt volcano

摘要: Abstract Volcanoes often erupt explosively and generate a variety of hazards including volcanic ash clouds gaseous plumes. These plumes are significant hazard to the aviation industry ground features can be major local communities. Here, we provide chronology 2009 Redoubt Volcano eruption using frequent, low spatial resolution thermal infrared (TIR), mid-infrared (MIR) ultraviolet (UV) satellite remote sensing data. The first explosion occurred on March 15, (UTC) was followed by series magmatic explosive events starting 23 (UTC). From 23–April 4 2009, satellites imaged at least 19 separate that sent up 18 km above sea level (ASL) dispersed across Cook Inlet region. In this manuscript, an overview from events, detailing their cloud-top heights discussing variations in absorption signals. We show timing TIR data relative event end time critical for inferring derived height true cloud top height. were high water content, likely form ice, which masked negative brightness temperature difference (BTD) signal typically used detection. analysis shown here illustrates utility during crises measure real-time parameters, such as heights, changes ground-based activity, plume/cloud location.