**7. References**

	- Chung, C. E., Ramanathan, V., Kim, D., & Podgorny, I. A., (2005), Global anthropogenic aerosol direct forcing derived from satellite and ground-based observations, *Journal of Geophysical Research*, Vol. 110, No. D24, pp. D24207

**Chapter 15** 

© 2012 Shao, licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use,

© 2012 Wertheim, licensee InTech. This is a paper distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

distribution, and reproduction in any medium, provided the original work is properly cited.

**A Method Analyzing Aerosol Particle Shape** 

Aerosol particle shape is a key parameter affecting its physical characters, especially scattering properties[1]. The information of shape reveals important application in such fields as atmospheric radiation and remote sensing, climate research, radar meteorology[2]. The convenient availability and simplicity of the Lorenz-Mie theory has resulted in a widespread practice of treating non-spherical particles as if they were spheres to which Lorenz-Mie results are applicable. However, the assumption of sphere is rarely made after first having studied the effects of non-sphere and concluded that they are negligible but is usually based

In a variety of occupational, environmental and industrial scenarios, particles within the size range from a few tenths of a micrometer to a few hundred micrometers play an important role[4]. Since the majority of aerosol particles are to some extent non-spherical and indicating relation with their origins, the knowledge of particles' shape may be used to judge the source of those particles and hence facilitate more effective contamination control and to reduce inadvertent particle generation. For example, fibrous particles are often corresponding to textile industry, flake-like particles corresponding to papermaking

The scattering profile of light scattered by any particle is determined by its size parameter, its shape, and its orientation with respect to the incident illumination[4]. The spatial intensity distribution of scattered light thus contains information by which the particle may often be classified or even identified. The light scattering suits to be used for deducing shape of aerosol particles by detecting scattering information, which is rapid and non-contact[5-7]. By analyzing pairs of signal from opposite detectors, Diehl differentiate bluffly the shape of suspending particles[8]. Bartholdi reflected majority of scattering light onto a circular photodiodes array, and gained more abundant information about particle shape[9]. Kaye

**and Scattering Based on Imaging** 

Shiyong Shao, Yinbo Huang and Ruizhong Rao

Additional information is available at the end of the chapter

on a perceived lack of practical alternatives[3].

http://dx.doi.org/10.5772/48314

**1. Introduction** 

industry, etc.

