2008
DOI: 10.1029/2008jd009834
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Aerosol characteristics over urban Cairo: Seasonal variations as retrieved from Sun photometer measurements

Abstract: During the Cairo Aerosol Characterization Experiment an automated Sun photometer belonging to the NASA Aerosol Robotic Network has been implemented for the first time in the megacity of Cairo, Egypt. The inversion of the measurements performed by this instrument several times a day and over a duration of more than 1 year (from the end of October 2004 to the end of January 2006) provides a way of determining the temporal variability of aerosol characteristics such as size distribution, complex refractive index,… Show more

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Cited by 73 publications
(66 citation statements)
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“…Several studies have been conducted to understand the main reasons for the increased pollution levels in Cairo using ground-based and satellite air quality data (Zakey et al, 2004;Abu-Allaban et al, 2002Alfaro and Wahab, 2006;El-Askary and Kafatos, 2008;Favez et al, 2008;Mahmoud et al, 2008;and El-Metwally et al, 2008;Marey et al, 2010 andPrasad et al, 2010). However, the genesis of the fall episodes (the black cloud season) is still under discussion and needs more investigations like the present study.…”
Section: Introductionmentioning
confidence: 96%
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“…Several studies have been conducted to understand the main reasons for the increased pollution levels in Cairo using ground-based and satellite air quality data (Zakey et al, 2004;Abu-Allaban et al, 2002Alfaro and Wahab, 2006;El-Askary and Kafatos, 2008;Favez et al, 2008;Mahmoud et al, 2008;and El-Metwally et al, 2008;Marey et al, 2010 andPrasad et al, 2010). However, the genesis of the fall episodes (the black cloud season) is still under discussion and needs more investigations like the present study.…”
Section: Introductionmentioning
confidence: 96%
“…Furthermore, the opaque particle cloud over Cairo and its neighboring regions may affect regional climate through the scattering or absorption of radiation (Haywood et al, 1999;Herman and Celarier, 1997;Robaa, 2004). It may even influence the growth of plants in the Nile Delta by altering the amount of radiation that is available for photosynthesis (El-Metwally et al, 2008). Furthermore, high aerosol loads are likely to influence the water cycle by suppressing precipitations (Rosenfeld, 2000).…”
Section: Introductionmentioning
confidence: 99%
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“…The lower altitude trajectories favour the transport of pollution aerosols over Hyderabad during winter; thus the relatively high AODs compared with those from other polluted urban locations (e.g. Cairo) during this season (El-Metwally et al, 2008). However, there is a small possibility for trajectories from western directions, originating mainly from Africa and driven by the western synoptic circulation pattern in northern midlatitudes.…”
Section: Air Mass Trajectoriesmentioning
confidence: 96%