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Transitional dispersive scenarios driven by mesoscale flows on complex terrain under strong dry convective conditions

by J. L. Palau, G. Pérez-Landa, M. M. Millán
Atmospheric Chemistry and Physics ()

Abstract

By experimentation and modelling, this paper analyses the atmospheric\ndispersion of the SO(2) emissions from a power plant on complex terrain\nunder strong convective conditions, describing the main dispersion\nfeatures as an ensemble of ``stationary dispersive scenarios{''} and\nreformulating some ``classical{''} dispersive concepts to deal with the\nsystematically monitored summer dispersive scenarios in inland Spain.\nThe results and discussions presented arise from a statistically\nrepresentative study of the physical processes associated with the\nmultimodal distribution of pollutants aloft and around a 343-m-tall\nchimney under strong dry convective conditions in the Iberian Peninsula.\nThis paper analyses the importance of the identification and physical\nimplications of transitional periods for air quality applications. The\nindetermination of a transversal plume to the preferred transport\ndirection during these transitional periods implies a small (or null)\nphysical significance of the classical definition of horizontal standard\ndeviation of the concentration distribution.

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