CACHE
The Cairo Aerosol Characterization Experiment (CACHE) was designed and carried out during two intensive observation periods (30 October�15 November 2004, and 20 March�14 April 2005) based on the terraced roof (20�m above ground level, agl) of the Physics Department of Cairo University (Giza, 30�01?34.3N; 31�12?26.4E). It is located in the southern part of Greater Cairo, about 3�km in a bee-line from the city centre (Sadate Square). The university is surrounded by open spaces, including the zoological garden, and the sampling site is at a distance of more than 200vm from the closest street.
