Categories
TERRESTRIAL AEROSOLS
Summary: AEROSOLS
Micron- cosmic analogs subcategories
Asteroids
Circumstellar shells
Comets
Origin
Redoubt volcano, Cook Inlet, Alaska, USA, 283 km southwest of Anchorage. The particles are from the 1989-1990 eruption and were collected 200 km from the volcano. The coarse fraction was removed by sieving
Main constituent
68-76 wt% glass, plagioclase feldspar, hornblende, cps, opx, magnetite, ilmenite
Practical significance
interpretation of remote sensing data. Analogues of other planets' atmospheric dust, and dust in comets, asteroids, and circumstellar shells
Particle size Fraunhofer: reff (μm)
6.4
Particle size Fraunhofer: veff
7.6
Size distribution plot
Size distribution table
Particle shape
similar to Redoubt A particles
Refractive index
estimated to be in the range [1.48-1.56] + i0.0018
Color
light gray
Scattering matrix (1) wavelength in nm
632.8
Scattering matrix (1) plot
Scattering matrix (1) table
Angle range (deg)
[3,173]
Paper (pdf)
Full reference paper
Muñoz O,Volten H, Hovenier JW, Veihelmann B, van der Zande WJ, Waters LBFM, Rose WI. Scattering matrices of volcanic ash particles of Mount St. Helens, Redoubt, and Mount Spurr Volcanoes. Journal of Geophysical Research, vol. 109, D16201, 2004
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