aospass3w

The photoacoustic soot spectrometer (PASS) measures light absorption by aerosol particles. As the particles pass through a laser beam, the absorbed energy heats the particles and in turn the surrounding air, which sets off a pressure wave that can be detected by a microphone.

The PASS instruments can also simultaneously measure the scattered laser-light at three wavelengths and therefore provide a direct measure of the single-scattering albedo.

The PASS is part of the aerosol observing system (AOS).

Absorption coefficient, 405 nm wavelength
Scattering coefficient, 405 nm wavelength

Cape Cod, MA, USA; Mobile Facility (TCAP)

• Latitude: 42.0305
• Longitude: -70.0493
• Publication Date: 2012-07-03
• Start Date: 2012-07-03
• End Date: 2013-04-17
• Last Updated: 2017-04-04

https://www.arm.gov/connect-with-arm/organization/instrument-mentors/list#pass

Stephen Springston

Brookhaven National Laboratory

Manvendra Dubey

Los Alamos National Laboratory

Allison Aiken

Los Alamos National Laboratory

Cynthia Salwen

Brookhaven National Laboratory

http://dx.doi.org/10.5439/1190011
Atmospheric Radiation Measurement (ARM) user facility. 2012, updated hourly. Photoacoustic Soot Spectrometer (AOSPASS3W). 2012-07-03 to 2013-04-17, ARM Mobile Facility (PVC) Highland Center, Cape Cod MA; MAOS (S1). Compiled by M. Dubey, S. Springston, C. Salwen and A. Aiken. ARM Data Center. Data set accessed at http://dx.doi.org/10.5439/1190011.