Chaiten eruption observations, May 2008

10 Feb 2011 | Contributor(s): William I Rose

A review of the Chaiten eruptions based mainly on satellite observations. This lecture was compiled in October 2009.

Detecting volcanic ash from space

08 Feb 2011 | Contributor(s): William I Rose

How satellites detect, map and measure volcanic ash in volcanic clouds. HYSPLIT and volcanic cloud satellite observations. Volcanic cloud stages. Infrared satellite detectors, split window. Evolution of volcanic clouds from space platforms.Rose, W I, G J S Bluth, D J Schneider, G G J Ernst, C M...

Direct sampling of volcanic clouds

08 Feb 2011 | Contributor(s): William I Rose

Volcanic clouds have only sporadically been directly sampled. Sampling is advantageous to validate remote sensing. Direct sampling was more common in the 1978-1984 period before the hazards to jet aircraft were understood and when piston aircraft sampling was more prevalent. This sampling...

Volcanological meteorology

08 Feb 2011 | Presentations | Contributor(s): William I Rose

Atmospheric layers, pressure temperature relationships. Origin of winds. Wind shear and pressure maps. Weather satellite data, weather radar systems. Cloud classifications. Radiosondes. Latent heat and Bowen ratios. Phase changes of water.

Ashfall blankets

08 Feb 2011 | Presentations | Contributor(s): William I Rose

Ashfall deposit geometry--blanket. Grain size/distance patterns. Total grain size distributions.Rose, W I, S Self, P J Murrow, G G J Ernst C Bonadonna and A J Durant, 2007, Pyroclastic fall deposit from the October 14, 1974 eruption of Fuego Volcano, Guatemala, Bull Volcanol,70 (9): 1043-1067,...

Numerical fallout models: An introduction based on Suzuki (1983)

08 Feb 2011 | Presentations | Contributor(s): William I Rose

Suzuki, T., 1983. A theoretical model for dispersion of tephra, in: D. Shimozuru and I. Yokoyama (eds) Arc Volcanism: Physics and Tectonics, Terra Scientific Publishing, Tokyo, 95-116.

Particle fall through the atmosphere

08 Feb 2011 | Presentations | Contributor(s): William I Rose

Particle fall in atmosphere. Particle Reynolds Numbers, turbulent and laminar flow. Shapes of volcanic ash particles. Fine particle fallout. Aggregation.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,...

Size of volcanic ash

08 Feb 2011 | Presentations | Contributor(s): William I Rose

Size of ash particles is discussed--ash, lapilli, fine and very fine ash, phi sizes, lognormal distributions and bimodal ones. Patterns of fallout and grain size distributions.

Eruption columns

08 Feb 2011 | Presentations | Contributor(s): William I Rose

Discussion of gas thrust, convective thrust and eruption columns. Column height and eruption rate. Convection in the atmosphere, latent heat. Stages of evolution of eruption plumes to volcanic clouds.

Phreatic and phreatomagmatic fragmentation

08 Feb 2011 | Presentations | Contributor(s): William I Rose

Origin of volcanic ash: Mechanisms for formation

08 Feb 2011 | Presentations | Contributor(s): William I Rose

Mechanisms for the formation of volcanic ash are reviewed and discussed, including explosive vesiculation, phreatomagmatic explosions and milling/comminution.

AshFall: A graduate course in volcanology with substantial meteorological content

26 Jan 2011 | Courses | Contributor(s): William I Rose

Michigan Tech's AshFall course by William I. Rose.This series of lectures was put together in 2009 as the lecture part of a graduate level course which students did some evaluations of ashfall models, comparing their results with actual ashfall deposits, including the Grain size distributions...

PASI: Volcanic Hazards and Remote Sensing in Pacific Latin America

11 Jan 2011 | Workshops | Contributor(s): William I Rose, Jose Luis Palma

http://www.geo.mtu.edu/~raman/PASI2011The Open Vent Volcanoes PASI in Costa Rica gathered 60 scientists from 13 countries to build scientific networking in the transdisciplinary field of volcanology in January 2011. The accelerating application of field measurements and remote sensing to...