| Facts and Figures |
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| name of sample |
El Chichon |
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| origin |
El Chichon volcano in
Mexico. The particles were collected at a |
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few kilometers from the
vent within 24 hours after an eruption in 1982. |
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| main constituents |
volcanic silicate ash |
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| particle size |
distributions
measured with laser diffraction |
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reff=3.2 micrometer, veff =5.4 |
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| particle shape |
irregular, see: Gooding and Clanton,
"El Chichon volcanic ash |
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in the stratosphere: Particle
abundances and size distributions after |
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the 1982 eruption, Geophys. Res.
Letters, 10, 1033-1036, 1983 |
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| refractive index |
estimated to be around: |
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1.5-1.6
- i0.001 |
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| color |
very similar to |
pinatubo
color |
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| scattering matrix elements |
F11 and -F12/F11 from 5-173 degrees
scattering angle |
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| wavelength |
632.8 nm (figure) |
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632.8 nm |
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| article |
Experimental determination of the
phase function and degree of linear polarization |
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of El Chichōn and Pinatubo volcanic
ashes. |
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Muņoz O, Volten H, de Haan JF,
Vassen W, Hovenier JW. |
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Journal of Geophysical Research,
107,10.1029/2001JD000983,2002 |
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