THE EFFECTS THAT THE OPTICAL-PROPERTIES OF PARTICLES HAVE ON ATMOSPHERIC AEROSOL MEASUREMENTS WITH OPTICAL-PARTICLE SPECTROMETERS

The response of optical spectrometers is affected by the optical properties of measured particles. Kim and Boatman (1990a, 1990b) derived new corrected size calibration data, based on the Mie scattering response calculations for different refractive index values. The validity of these calibration corrections was assessed by comparing the aerosol scattering extinctions calculated from the spectrometer data with those measured simultaneously by a three-wavelength nephelometer. The agreement between the measured and calculated scattering extinctions was within 15%, when the size calibration data from the "rural" aerosol model were used.