Review Article Volume 7 Issue 4 - December 2017 DIO : 10.19080/IJESNR.2017.07.555720 Estimation of Relationship Between Aerosol Optical Depth, PM 10 and Visibility in Separation of Synoptic Codes, As Important Parameters in Researches Connected to Aerosols; Using Genetic Algorithm in Yazd Mahdi Dehghan, Kamal Omidvar, Gholamali Mozafari* and Ahmad Mazidi Department of Geography, University of Yazd, Iran Submission: December 11, 2017; Published: December 21, 2017 *Corresponding author: Gholamali Mozafari, Associate Professor of Climatology, Faculty of Geographical Sciences, Yazd University, Yazd, Iran, Tel: ; Email: Int J Environ Sci Nat Res 7(4): IJESNR.MS.ID.555720 (2017) 00108 Int J Environ Sci Nat Res Copyright © All rights are reserved by : Gholamali Mozafari Abstract Aerosol Optical Depth (AOD) is closely related to PM 10 (mass concentration of particulate matter with aero dynamical diameter less than 10 µm) and visibility; and all of these three parameters are so important and useful to studies connected to aerosols, troposphere dust, air pollution and atmospheric radiation budget. This study analyzed the mathematic relations between AOD, PM 10 and visibility whit separation of 05, 06 and 07 synoptic conditions; whit using evolutional Genetic Algorithm. The area’s case study has been Yazd city as representative of central of Iran for 5 years (2011-2015). The aim of this analysis has been to reach relations that can estimate lack quantities of mentions data parameters from another existence data whit the least error. To attain these mathematic relations, liner regression equation and several kind of famous function has been comparison; which the Polynomial function selected as the best fitness function. The conclusion of this study was four function based on polynomial liner model with 95% confidence bounds that presented. These presented equations are for estimate AOD from PM 10 and visibility quantities in general condition; and in 05, 06 and 07 synoptic codes separations. Keywords: Aerosol optical depth; PM 10 ; Visibility; Genetic Algorithm; Polynomial Function; Yazd Abbreviations: PM: Particulate Matter; AOD: Aerosol Optical Depth; MODIS: Moderate Resolution Imaging Spectro Radiometer; RMSE: Root- Mean-Square Error; UTC: Coordinated Universal Time Introduction Troposphere aerosols which are well known as particulate matter (PM) consist one of the regulatory parameters in the atmosphere by changing the Earth’s radiation budget and thus aerosols have an extensive impact on our climate and our environment. The PM concentration has become an important index of air pollution, and gained more and more attention from the organizations and administrations of environmental protection, public health and science all over the world. Short and long term exposure to PM causes ascending mortality rates, and morbidities such as variety of cardiovascular diseases [1-4]. PMs with aerodynamic diameters less than 10 microns (μm) known as PM 10 ; that is a major component of air pollution that threatens both our health and our environment. Visibility is defined as the greatest distance in a given direction at which an object can be visually identified whit unaided eyesight [5]. Horizontal visibility is an indicator of air quality, and PM adversely associated with visibility impairment. Also, 05 (Haze), 06 (widespread dust in suspension not raised by wind) and 07 (dust or sand raised by wind) are some of the most important synoptic condition effective to horizontal visibility. As reported by previous studies, aerosol concentration variability can change particle extinction properties and thus affect visibility [6,7]. On the other hand, Aerosol Optical Depth (AOD) is defined for the entire column of atmosphere and is a measure of the extinction of light from the surface to the top of the atmosphere. AOD is an aerosol optical property which is now well retrieved from numerous sensors such as Moderate Resolution Imaging Spectro radiometer (MODIS) [8,9]. It can be measured by MODIS as well as by ground based instruments (sun photometers) at multiple wavelengths [10]. Therefore, it seems that we can establish some equations to estimate these parameters to define some lack data from other existence. Previous researches have examined the correlation between visibility and the aerosol characteristic, and have made it clear that the heterogeneous concentration of aerosols in the atmosphere, changes atmospheric optical conditions and consequently,