CIRPAS Aerosol and cloud Probes

1
CIRPAS Aerosol and cloud Probes

• PCASP
• Wide angle scatter, Range 0.1 - 3.0 mm
  diameter.
• FSSP-100
• Forward Scatter, Ranges (selectable) 1.8 mm,
  1-16 mm,
• 1-32 mm, or 1 50 mm diameter.
• APS
• Time of flight Range 0.6 to 10 mm.
• CAPS
• Forward Scatter Range 0.5 50 mm diameter
• Backscatter Range 1 to 120 mm diameter
• Occultation Range 25(?) 1550 mm diameter

2
Probe Calibration (CAPS)
Backscatter response
Forward scatter response Horizontal lines are
channel boundaries i.e., pulse heights in volts
3
Probe Calibration (PCASP/FSSP)
FSSP response
PCASP Response The solid curves are
modelled responses for different refractive
indexes
4
Data reduction
Uncertainties in inversion from measured
pulse height to diameter for the CAPS-forward
scatter Probe.
5
Size distributions (Sample I)
Ace Asia dust Red is CASF Black is CASB Blue is
FSSP Data from 010409
6
Size Distribution (Sample II)
CARMA Blue is CASF Green is FSSP In cloud On
021010 Over Monterey Bay