Formation of ash Eruption Columns GSD Particle Fall Ash Blankets Meteorology and fall Direct Sampling
Remote Sensing Models of Ashfall Case Studies Textbooks and References
Formation of ash Eruption Columns GSD Particle Fall Ash Blankets Meteorology and fall Direct Sampling
Remote Sensing Models of Ashfall Case Studies Textbooks and References
Particle Fall in the Atmosphere
2009
Gravity, air resistance,
laminar and turbulent flow, terminal velocity
Particle fall in the atmosphere
Gravity and air resistance help to govern the fall of particles from the atmosphere. Most particles reach a terminal velocity after a few seconds.
Readings
Bonadonna, C, GGJ Ernst and RSJ Sparks, 1998, Thickness variations and volume estimates of tephra fall deposits: the importance of particle Reynolds number JVGR 81 173-187.
Riley, C M, W I Rose and G J S Bluth, 2003, Quantitative shape measurements of distal volcanic ash, Jour Geophys Res 108 no B10, 2504
Rose W I, C M Riley and S Dartevelle, 2003, Sizes and shapes of 10 ma distal ashfall pyroclasts in the Ogalalla Group, Nebraska, J Geology, 111:115-124.