Distinguishing remobilized ash from erupted volcanic plumes using space-borne multi-angle imaging.

ABSTRACT: Volcanic systems are comprised of a complex combination of ongoing eruptive activity and secondary hazards, such as remobilized ash plumes. Similarities in the visual characteristics of remobilized and erupted plumes, as imaged by satellite-based remote sensing, complicate the accurate classification of these events. The stereo imaging capabilities of the Multi-angle Imaging SpectroRadiometer (MISR) were used to determine the altitude and distribution of suspended particles. Remobilized ash shows distinct dispersion, with particles distributed within ~1.5 km of the surface. Particle transport is consistently constrained by local topography, limiting dispersion pathways downwind. The MISR Research Aerosol (RA) retrieval algorithm was used to assess plume particle microphysical properties. R

SUBMITTER: Flower VJB 

PROVIDER: S-EPMC5857963 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature