View
218
Download
0
Category
Tags:
Preview:
Citation preview
UC Santa Cruz @ VOCALS?
• PI: Patrick Chuang• Instrument: Phase-Doppler
interferometer• Measures cloud drop
– size– velocity – inter-drop spacing
on a single drop basis.• Size range: 3 to 150 um
PDI mounted on the CIRPAS TwinOtter
Sample data from the Marine Stratocumulus Experiment (MASE). Note the occurence of bi-modal distributions most likely caused by collision-coalescence, a key process in drizzle formation.
Comparison of view volume diameter derived from in situ measurements and theoretically-derived curve.
The theoretical curve uses two parameters:
1. The laser beam waist diameter
2. The minimum scattered light intensity required for detection by photodetectors.
Fitting data to theoretical curve retrieves (1), leaving (2) as the only free parameter.
Recommended