Analysis of Aerosol Absorption Properties and Transport Over North Africa and the Middle East Using AERONET Data

• Main Authors: Farahat, Ashraf, el-Askary, Hesham, Adetokunbo, Peter, Fuad, Abu-Tharr
• Format: Text
• Language: unknown
• Published: Chapman University Digital Commons 2016
• Subjects: Atmospheric composition and structure; aerosols and particles; pollution – urban and regional); Atmospheric Sciences; Environmental Indicators and Impact Assessment; Environmental Monitoring; Other Oceanography and Atmospheric Sciences and Meteorology; Aerosol Robotic Network
• Online Access: https://digitalcommons.chapman.edu/scs_articles/344; https://digitalcommons.chapman.edu/cgi/viewcontent.cgi?article=1344&context=scs_articles

In this paper particle categorization and absorption properties were discussed to understand transport mechanisms at different geographic locations and possible radiative impacts on climate. The long-term Aerosol Robotic Network (AERONET) data set (1999–2015) is used to estimate aerosol optical depth (AOD), single scattering albedo (SSA), and the absorption Ångström exponent (abs) at eight locations in North Africa and the Middle East. Average variation in SSA is calculated at four wavelengths (440, 675, 870, and 1020 nm), and the relationship between aerosol absorption and physical properties is used to infer dominant aerosol types at different locations. It was found that seasonality and geographic location play a major role in identifying dominant aerosol types at each location. Analyzing aerosol characteristics among different sites using AERONET Version 2, Level 2.0 data retrievals and the Hybrid Single Particle Lagrangian Integrated Trajectory model (HYSPLIT) backward trajectories shows possible aerosol particle transport among different locations indicating the importance of understanding transport mechanisms in identifying aerosol sources.