The content of the ARM website is available to any browser, but for the best experience we highly recommend you upgrade to a standards-compliant browser such as Firefox, Opera or Safari.
VIEW CART
primary link menu HOME SITE INDEX PEOPLE
skip to main content ABOUT ARMABOUT ACRFSCIENCESITESINSTRUMENTSMEASUREMENTSDATAPUBLICATIONSEDUCATIONFORMS
Cover image

Photoacoustic Instrument for Measurement of Aerosol or Gaseous Light Absorption

Arnott, W.P., Moosmuller, H., and Rogers, C.F., Desert Research Institute
Ninth Atmospheric Radiation Measurement (ARM) Science Team Meeting

A photoacoustic instrument has been developed and evaluated for measurement of aerosol light absorption. This instrument produces a direct measure of absorption by use of a calibrated microphone and determination of laser power, in contrast to filter methods that require empirical calibration and are subject to strong effects of aerosol extinction. The instrument was evaluated during the winter of 1996-97 in Brighton, Colorado, during the North Front Range Air Quality Study (NFRAQS). Results of the instrument intercomparison with other methods during NFRAQS will be given along with discussion of the use of the instrument for evaluating the filter instruments currently in use at the Southern Great Plains (SGP) site.

Note: This is the poster abstract presented at the meeting; an extended version was not provided by the author(s).