The coarse and fine fractions of Particulate Matter normally lack of correlation on a daily time-scale, due to their different sources. On the contrary, the degree of correlation between size fractions with progressively closer aerodynamic diameters is expected to improve, because very likely they have the same origin. The advection of polluted air masses from remote areas brings aerosol from completely different sources and consequently causes a drop of correlation. The measurement of surface aerosol levels with high size and time resolution and the correlation between the size fractions have been used as an useful support to identify long-range transport episodes. The interpretation of the aerosol size spectra was supported by dust-models and backward-trajectory analysis to assess the origin of the long-range transported air masses.
|Titolo:||Time and size resolved measurements of atmospheric aerosol applied to the study of long-range mass transport episodes|
|Data di pubblicazione:||2009|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|