3. Deshler, T., Observations for Chemistry (In Situ): Particles, article for Encyclopedia of Atmospheric Science, Academic Press, 2002.

4. Wyoming Optical Particle Counter, r > 0.2 - 10.0 m
Aerosol in
Optical Chamber
Processor
White
light
PHA
PMTs
Pump

5.
present
Post
El Chichon

7. Low Gain
Mid Gain
High Gain

10. M=
0.1 µm
0.2
0.3
0.4
White light

11. M= M=
1.0 µm
X=10
0.5 µm
0.6
0.7
0.8