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

Manacapuru, Amazonas, Brazil; Mobile Facility (GOAMAZON)

• Latitude: -3.21297
• Longitude: -60.5981
• Publication Date: 2014-01-30
• Start Date: 2014-01-30
• End Date: 2015-07-02
• Last Updated: 2015-07-12

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. 2014, updated hourly. Photoacoustic Soot Spectrometer (AOSPASS3W). 2014-01-30 to 2015-07-02, ARM Mobile Facility (MAO) Manacapuru, Amazonas, Brazil; 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.