In this work an analysis of the local aerosol dynamics is presented. Measurements have been carried out on the Mazzorbetto Island in the Venice Lagoon using a measuring station based on an ultrasonic anemometer and a real-time PM2.5 optical detector. Measurement system allows to detect fluctuations of the concentration and velocity fields that are used to evaluate the vertical turbulent fluxes of PM2.5. The information obtained, correlated with local meteorological parameters, gives insights about local aerosol dynamics that are useful to interpret air quality data. Two measurement campaigns have been carried out: the first during the summer and the second one during the winter, however the results presented refer mainly to measurement taken in the summer period in which concentration levels are lower with respect to the ones measured in the winter. In the summer it is present a general circulation with wind coming from the Alps during the night and a sea breeze during the day. During this circulation the largest concentration values as well as the periods of negative fluxes are mainly associated to nocturnal and early morning hours with wind coming from NE.
Measurements of PM2.5 concentration and vertical turbulent mass fluxes in the surface layer
PRODI, Franco
2005
Abstract
In this work an analysis of the local aerosol dynamics is presented. Measurements have been carried out on the Mazzorbetto Island in the Venice Lagoon using a measuring station based on an ultrasonic anemometer and a real-time PM2.5 optical detector. Measurement system allows to detect fluctuations of the concentration and velocity fields that are used to evaluate the vertical turbulent fluxes of PM2.5. The information obtained, correlated with local meteorological parameters, gives insights about local aerosol dynamics that are useful to interpret air quality data. Two measurement campaigns have been carried out: the first during the summer and the second one during the winter, however the results presented refer mainly to measurement taken in the summer period in which concentration levels are lower with respect to the ones measured in the winter. In the summer it is present a general circulation with wind coming from the Alps during the night and a sea breeze during the day. During this circulation the largest concentration values as well as the periods of negative fluxes are mainly associated to nocturnal and early morning hours with wind coming from NE.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
