WIT Press


Coastal Environment And Statistical Uncertainty In Atmospheric Dispersion Modelling. A Case Study In Brazil

Price

Free (open access)

Volume

15

Pages

10

Published

1996

Size

1,192 kb

Paper DOI

10.2495/CENV960231

Copyright

WIT Press

Author(s)

P. Martano

Abstract

The evaluation of an atmospheric dispersion model through field concentration measurements is strongly affected by a statistical error depending on turbulent fluctuations in the concentration near the ground The estimation of such uncertainty is related to the interplay between the concentration correlation time TC, the total averaging time T and the fluctuations intensity (say the local concentration variance). The total averaging time T is restricted by the need of stationarity in the local meteorology (the boundary conditions of the turbulence field), that is often critical in the coastal environment, because of changes in local baroclinicity, atmospheric stratification, and even tides/currents effects. Also the autocorrelation time TC is expected to have strong variations for the ground conce

Keywords