Rugged Terrain Effects on Diffusion

Examining the influence of meteorological simulations forced by different initial and boundary conditions in volcanic ash dispersion modelling

“…An inappropriate representation of the meteorological fields and the geographical characteristics can lead to errors in the numerical simulations of the transport of chemical species, aerosols, and particulate matter (Hanna and Strimaitis, 1990;Brioude et al, 2012). In particular, many studies reveal that errors in wind direction are the most important because they directly affect the dispersion mechanisms of pollutants (mainly transport and dilution) and make it difficult to properly identify the potentially affected areas.…”

Diurnal Wind Characteristics in and around Chisapani Confluence of Karnali River in Mid-Western Nepal

“…These winds have decisive impact on local weather and microclimate affecting human life and the environment. These thermally driven winds can significantly enhance air pollution transport and dispersion (Hanna & Strimaitis 1990, Banta et al 1997, Raga et al 1999, Whiteman, 2000, Alexandrova et al 2003, Kitada & Regmi 2003, fire propagation (Whiteman 2000), the formation of fog and convective precipitation (Smith et al 1997), noise propagation (Heimann & Gross 1999), and wind energy potential (Sturman 1987). The rich literatures on thermally driven wind system can be found in Defant (1951), Flohn (1969), McGowan and Sturman (1996) and Whiteman (2000).…”