Analysis of aerosol absorption properties and transport over North Africa and the Middle East using AERONET data

• Published in: Annales Geophysicae
• Main Authors: Farahat, Ashraf, El-Askary, Hesham, Adetokunbo, Peter, Fuad, Abu-Tharr
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus GmbH
• Subjects: Atmospheric composition and structure (aerosols and particles; pollution - urban and regional); Aerosol Robotic Network
• Online Access: http://hdl.handle.net/10576/18214; https://doi.org/10.5194/angeo-34-1031-2016

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 �ngstr�m 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. The authors would like to acknowledge the support provided by the Deanship of Scientific Research (DSR) at the King Fahd University of Petroleum and Minerals (KFUPM) for funding this work through project no. IN121064. Scopus