Multi-angle absorption photometry-a new method for the measurement of aerosol light absorption and atmospheric black carbon [An article from: Journal of Aerosol Science]

This digital document is a journal article from Journal of Aerosol Science, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
A new method is presented which determines the aerosol light absorption from the simultaneous measurement of radiation passing through and scattered back from a particle-loaded fibre filter. The measurement is performed at three detection angles to resolve the influence of light-scattering aerosol components on the angular distribution of the back scattered radiation. The fraction of light absorbed by the deposited aerosol (absorbance ABS) is obtained from a radiative transfer scheme. The method response normalised to the mass concentration of black carbon to test aerosols with mass fractions of the light-absorbing component between 1.2% and 100% (aerosol single scattering albedo 1.0-0.28) varied by >300% for a transmission measurement only, but by