Hassan Lyamani

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[1] The planetary boundary layer (PBL) height is a key variable in climate modeling and has an enormous influence on air pollution. A method based on the wavelet covariance transform (WCT) applied to lidar data is tested in this paper as an automated and nonsupervised method to obtain the PBL height. The parcel and the Richardson number methods applied to(More)
This study focuses on the analysis of Aerosol Robotic Network (AERONET) aerosol data obtained over Alborán Island (35.90 N, 3.03W, 15 m a.s.l.) in the western Mediterranean from July 2011 to January 2012. Additional aerosol data from the three nearest AERONET stations (Málaga, Oujda and Palma de Mallorca) and the Maritime Aerosol Network (MAN) were also(More)
During the first half of August 2003 the Iberian Peninsula (IP) and a great part of Western Europe suffered a severe heat wave. This event was associated with a very robust and persistent high-pressure system over Western Europe that blocked the flow of rain-bearing low-pressure systems at 700 and 500mb. Using sun-photometric data obtained during August(More)
The columnar properties of atmospheric aerosol (size distributions, single scattering albedo and asymmetry parameter) are investigated based on sun/sky photometer measurements obtained during August 2003 at Granada (37.181N, 3.581W, 680m a.s.l.), southeastern Spain. Also, we compute and analyze the average aerosol radiative forcing under two different(More)
The most recent works demonstrate that the lidar overlap function, which describes the overlap between the laser beam and the receiver field of view, can be determined experimentally for the 355 and 532 nm channels using Raman signals. Nevertheless, the Raman channels cannot be used to determine the lidar overlap for the infrared channel (1064 nm) because(More)
a Centro Andaluz de Medio Ambiente (CEAMA), Universidad de Granada, Junta de Andalucía, Av. del Mediterráneo, 18006 Granada, Spain b Departamento de Física Aplicada, Universidad de Granada, Campus de Fuentenueva, 18071 Granada, Spain c Centro de Geofísica de Évora (CGE), Universidade de Évora, Rua Romão Ramalho 59, 7000 Évora, Portugal d Centro de(More)
There is experimental evidence that the non-sphericity of certain atmospheric particles can cause scattering properties different from those predicted by standard Mie theory. Numerous studies indicate the need to consider the presence of non-spherical particles in modeling the optical properties of atmospheric aerosols. On the other hand, natural aerosols(More)