1. DOE G-1 Research Aircraft Facility Instrument Summary
November 5, 2008
Stephen R. Springston
Atmospheric Sciences Division
Brookhaven National Laboratory

2. Measurements State Aerosol Composition/Cloud Microphysical Properties
Position, T, RFT, IRT, Dew Pt, TDLAS, Gust Probe, Up/Down UV, SRR (Shake, rattle and roll(sic))
Aerosol Composition/Cloud Microphysical Properties
AMS, PILS, TRAC, LWC, Aerosol N, dN/d log Dp, CCN, sap, sap = f(l), ssp = f(l)
Gas-Phase Species
SO2, O3, CO, Organics

3. ‘Back of the Envelope’

4. State
Position – Trimble Hz, Trimble TANS Euler Hz
Temperature –
Total: Rosemount 200 Hz
Reverse Flow: BNL/NCAR/SEA 200 Hz
IRT: In optically thick clouds

5. State Water Vapor – LWC Dew Point Hygrometer TDLAS (~10 Hz)
Gerber PVM-100, 200 Hz

6. State Winds, Turbulence (200 Hz) – Gust Probe, Accelerometer
Other – Up/Down UV Irradiance

7. Aerosol Composition/Cloud Microphysical Properties
AMS (cTOF) – Aerodyne Research Incorporated

8. Aerosol Composition/Cloud Microphysical Properties
PILS – ~3 min
cations: Na+, K+, Ca++, NH4+
anions: SO4--, NO3-, Cl-

9. Fine Aerosol # TSI 3010 (> 10 mm) TSI 3025 (> 3 mm)
DMT CCNs (3 supersaturations: 0.2, 0.28, 0.4%)

10. Particles/Clouds Twin DMAs: 15-440 nm, ~1 min scans
FIMS: nm, ~1 s resolution
Charger
Separator
Condenser
Laser
High Voltage
25 oC
10 oC
CCD
Butanol Saturated
Sheath Flow x
Aerosol
Flow
Geometry
22 nm particles
(Kulkarni and Wang, 2006a,b; Olfert and Wang, 2008) z y

11. Particles/Clouds PCASP: ~0.1 - 3mm, 10 Hz CAPS:
CAS: ~ mm, 10 Hz
also Particle by Particle (204 individual every 0.1 s)
CIP: ~25mm – 1.5 mm, 10 Hz

12. Aerosol Optical Properties
TSI 3l Nephelometer
Photo Thermal Interferometry

13. Folded Jamin Interferometer for measurement of aerosol absorption
It is highly desirable to directly measure aerosol absorption & without interference from aerosol scattering
Jamin head
Sample chamber
6-in
Aerosol Sample inlet
Retro assembly
514 nm excitation
Right angle prisms
• Insensitive to rotation and tilt
• Simple positional alignment
• Common mode rejection provides increased mechanical robustness
• Designed to fit into instrument rack
PTS relies on the thermal dissipation of spectrally absorbed energy for its signal

14. Aerosol Optical Properties
Radiance Research 3l PSAP
Noise Characteristics of an Instrumental Particle Absorbance Technique
Stephen R. Springston and Arthur J. Sedlacek, III

15. Example:
tavg = 2 s (as recorded)
tavg = 12 s (boxcar)
tavg = 12 s (avg I, I0)

16. Gas-Phase Species
SO2: TEI Model 43S, UV fluorescence ~ s resolution
Organics: PTRMS
CO: VUV fluorescence ~1-2 5 s resolution
O3: TEI Model , UV photometry

17. Gas-Phase Species
O3: Solid-State Chemiluminescence, BNL

18. After the Flight

19. After the Flight ~200 Mb/hour Processed to .pdf, .txt, and other
Quick look ~3 hours,
Preliminary post ~1 day
ftp://ftp.asd.bnl.gov/pub/ASP%20Field%20Programs/2008VOCALS/