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Atmosphere 2015, 6(12), 1889-1903;

Irradiance Impact on Pollution by Integrating Nephelometer Measurements

Dipartimento di Matematica e Fisica, Università del Salento, Via per Arnesano, 73100 Lecce, Italy
Author to whom correspondence should be addressed.
Academic Editor: Daniele Contini
Received: 30 October 2015 / Revised: 26 November 2015 / Accepted: 2 December 2015 / Published: 8 December 2015
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Three-wavelength integrating nephelometer measurements combined with short- (SW) and long-wave (LW) irradiance measurements were used to investigate the irradiance effects on the daily evolution of the particulate matter (PM) at the ground level, and contribute to the characterization of the land–atmosphere interaction in pollution dispersal. The integrating nephelometer measurements have allowed characterizing the daily changes of the PM optical and microphysical properties by the aerosol scattering coefficient (σp) and the scattering Ångström coefficient (å). We found that on a daily basis σp reached the minimum values when the irradiance reached the maximum values, since the convective motions, which favor the particle dispersion at the surface, increase with the irradiance. The å value, which is commonly used as qualitative indicator of the dominant particle size, has allowed evaluating the irradiance effects on the mean particle size distribution at the surface and revealed that the irradiance increase favors mainly the dispersion of the ground-level fine particles. Particle size-distribution measurements supported the last comment. Measurements were performed from 4 to 10 May 2015 when the study site was affected by a Saharan dust outbreak, to also evaluate the impact of long-range transported particles on the daily evolution of the ground-level particle’s properties and the SW and LW irradiance. View Full-Text
Keywords: air pollution; integrating nephelometer measurements; short-wave irradiance; long-wave irradiance; desert dust air pollution; integrating nephelometer measurements; short-wave irradiance; long-wave irradiance; desert dust

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Perrone, M.R.; Burlizzi, P.; Romano, S. Irradiance Impact on Pollution by Integrating Nephelometer Measurements. Atmosphere 2015, 6, 1889-1903.

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