Abstract
This work embodies the results of the effect of the water soluble components on the radiative forcing of continental average aerosols, from aerosol data extracted from optical properties of aerosols and cloud (OPAC) 4.0 software package using FORTRAN program to model the effect of water soluble on optical depth, asymmetric parameter, scattering and absorption coefficients at the spectral range of (0.25-0.80µm) and at eight relative humidities (0%,50%,70%,80%,90%,95%,98% & 99%). The concentration of water soluble was varied while concentrations of water insoluble and soot were kept constant. The optical parameters were used to compute numerically the radiative forcing using the concept of chylek and wong, the Angstrom exponent (α), turbidity (β) and Curvature ....... Keywords: Angstrom exponent, Curvature, Optical depth, Radiative forcing, Turbidity. DOI: 10.7176/APTA/79-04 Publication date:September 30th 2019
Highlights
Atmospheric aerosols, which are defined as liquid or solid particles suspended in a gas (Seinfeld and Pandis, 2006), are tiny and usually invisible to our eyes
The results of Angstrom exponent and radiative forcing for water soluble component of atmospheric aerosols models extracted from optical properties of aerosols and cloud (OPAC) 4.0
The values of α reflects the dominance of fine/accumulation modes, but at deliquescence point (98-99%) relative humidities (RHs) it is less than 1 signifies the presence of coarse mode particles as fine mode are act as cloud condensation nuclei
Summary
Atmospheric aerosols, which are defined as liquid or solid particles suspended in a gas (Seinfeld and Pandis, 2006), are tiny and usually invisible to our eyes. They have an immense impact on our health and on our global climate. The Intergovernmental Panel on Climate Change (IPCC, 2007) concludes that the high uncertainty in the net radiative forcing of all main climate agents is mainly dominated by the large uncertainty in the aerosol radiative forcing. This is mainly caused by the high temporal, spatial, and compositional variability of the aerosol and the poorly understood and quantified aerosol effects
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