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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:29 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Link between air turbidity and pollution episodes
Authors:
Aurelia Olimpia SOFLETEA, Gabriela MANOLACHE, Sabina STEFAN (1)
*
Affiliation:
1) University of Bucharest, Faculty of Physics, P.O.BOX MG-11, Magurele, Bucharest, Romania
2) Technical University of Civil Engineering of Bucharest , Bd. Lacul Tei nr. 122 – 124, 020396, Bucharest, Romania
E-mail
mano_gaby@yahoo.com
Keywords:
PM10 ,turbitity, AOD,
Abstract:
The study of aerosol particles is of major importance due to effects on human health and their implications for climate change.The presence of the aerosol in the composition of the air mass determines their specific characteristics related to their opacity. The physical parameter that characterizes the opacity of an air vertical column in the atmosphere is named turbidity.The purpose of this paper is to determine the air turbidity in the urban environment for different weather conditions.The Ångström turbidity is calculated for the summer months of 2008.The data base used contains the daily particulate matter (PM10) mass concentrations measured at urban station Lacul Morii, Bucharest and the values of aerosol optical depth (AOD) determined using OPAC Soft (Hess et al., 1998). The comparison between turbidity values obtained from the Ångström equation and parameterization equation have shown small differences between the two methods. Days with a high concentration of PM10 (over 60 μg/m3) corresponding to high turbidity values were considered as episodes of pollution. The results showed that turbidity values are in the usual limits for the area in a continental climate zone. From the spectral variation of turbidity, it was found that turbidity is closely related to direct solar radiation, depending on the wavelength.
References:
Hess, M., Koepke, P, Schult I., 1998: Optical properties of aerosol and clouds-the software package OPAC, Bull. Amer. Meteorol. Soc., 79 (5), 831-844
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