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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:06 |
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Conference: Bucharest University Faculty of Physics 2003 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Influence of sulphate aerosol particles on radiative properties of clouds
Authors:
Gabriela Iorga*, Sabina Stefan**, Alina Olaru*
Affiliation:
* Department of Physics, Faculty of Chemistry, University of Bucharest,
Regina Elisabeta Avenue, No. 4-12, 70346, Bucharest, Romania
** Department of Atmospheric Physics, Faculty of Physics, University of Bucharest,
P.O. Box MG-11, 76900, Bucharest-Magurele, Romania
E-mail
Keywords:
Abstract:
Tropospheric aerosols, from natural and anthropogenic sources, influence significantly the radiative balance of the Earth by its direct and indirect effects.
The aim of this paper is to study the links between aerosol particles (SO2 and SO42-) and the cloud radiative properties. Consequently, using the production parameters and burdens of SO2 and SO42- predicted by eleven chemical transport models, were calculated the microphysical parameters: LWC (liquid water content), CDNC (cloud droplet number concentration), Reff (effective radius), A (cloud albedo), and the susceptibility (the sensitivity of cloud albedo to changes in cloud droplet number concentration). The relationships proposed by Boucher and Lohmann (1995) and by Menon and Saxena (1998) were used to compare the values of CDNC for maritime and continental clouds.
The obtained values for the cloud parameters are in agreement with the results from satellitare data.
Selective References:
Boucher, O., Lohmann, U. (1995): The sulphate-CCN-cloud albedo effect: a sensitivity study with two general circulation models, Tellus, 47B, 281-300;
Menon, S., Saxena, V.K. (1998): Role of sulphate in regional cloud-climate interaction, Atmos. Res. 47, 299-315
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