1 July 2005 Investigation of spectral dependence of shortwave radiation absorption by ambient aerosol using time-resolved photoacoustic technique
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Abstract
The method of time-resolved photoacoustic spectroscopy is applied to study the weak aerosol absorption of shortwave radiation in the atmospheric air. Using synchronous measurements of aerosol light absorption coefficients by a pulsed photoacoustic spectrometer and mass concentration of black carbon by an Aethalometer, we determine the values of the efficiency σ of aerosol light absorption in the atmospheric air in the shortwave spectral range for three wavelengths: σ (0.532 µm)=(5.49±3.57)m2 g–1, σ(0.694 µm)=(4.46±2.61)m2 g–1, and σ(1.064 µm)=(2.87±1.84)m2 g–1. The experimental results are approximated by the spectral dependence σ(λ)=3.1λ–0.92, where wavelength λ is expressed in micrometers. We discuss the calibration procedure for the pulsed photoacoustic spectrometer in studying the aerosol absorption.
© (2005) Society of Photo-Optical Instrumentation Engineers (SPIE)
Alexey B. Tikhomirov, Konstantin M. Firsov, Valerii Stepanovich Kozlov, Mikhail V. Panchenko, Yurii N. Ponomarev, Boris Alexandrovich Tikhomirov, "Investigation of spectral dependence of shortwave radiation absorption by ambient aerosol using time-resolved photoacoustic technique," Optical Engineering 44(7), 071203 (1 July 2005). https://doi.org/10.1117/1.1955327 . Submission:
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