Preliminary investigation about the fractal distribution of aerosols at

Preliminary investigation about the fractal distribution of aerosols at

Preliminary investigation about the fractal distribution of aerosols at the Jasso Station,
in Tula region, Hidalgo.
Rubén Darío Arizabalo1, Eugenio González-Avalos1 and Gustavo Sosa Iglesias1
1
Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas Núm. 152.
Col. San Bartolo Atepehuacan. Delegación Gustavo A. Madero. 07730, México, D.F.
Tel: (5255) 9175-8342; e-mail: [email protected]
The multi-scale study of the air pollution by particles is based on the experimental identification of the submicrometric atmospheric particles underlying growth, and the use of different approach data analyses, like fractal
analysis, among others. In order to obtain experimental data related to aerosols in Tula region, in the State of
Hidalgo, during the MILAGRO campaign in 2006, atmospheric sub-micron particles concentrations were
measured at the Jasso Station, using a SMPS (Model 3936 TSI). Then the data were analyzed using a fractal
technique. In this work we present the results from such fractal analysis applied to number and mass distribution
of sub-micrometric particles, as a function of diameter and time, exploring the relation between the geometry of
temporary distribution and the respective change of fractal dimension. In this way, through the Hurst coefficient
(fractal co-dimension) was possible to infer atmospheric events which impacted on the concentration of particles
along the day. Variations between 0.6 and 0.9 for Hurst coefficient were observed, which indicates slightly rough
distributions that can be studied as a fractional Brownian motion (fBm).