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- W2053203092 abstract "A new version of an advanced mesoscale dispersion modeling system for simulating passive air pollutant dispersion in the real atmospheric planetary boundary layer (PBL), is presented. The system comprises a diagnostic mass-consistent meteorological model and a Lagrangian particle dispersion model (LADISMO). The former version of LADISMO, developed according to Zannetti (Air pollution modelling, 1990), was based on the Monte Carlo technique and included calculation of higher-order moments of vertical random forcing for convective conditions. Its ability to simulate complex flow dispersion has been stated in a previous paper (Hernández et al. 1995, Atmospheric Environment, 29A, 1331–1341). The new version follows Thomson's scheme (1984, Q. Jl Roy. Met. Soc. 110, 1107–1120). It is also based on Langevin equation and follows the ideas given by Brusasca et al. (1992, Atmospheric Environment 26A, 707–723) and Anfossi et al. (1992, Nuovo Cemento 15c, 139–158). The model is used to simulate the dispersion and predict the ground level concentration (g.l.c.) of a tracer (SF6) released from both an elevated source (case a) and a ground level source (case b) in a highly complex mountainous terrain during neutral and synoptically dominated conditions (case a) and light and apparently stable conditions (case b). The last case is considered as being a specially difficult task to simulate. In fact, few works have reported situations with valley drainage flows in complex terrains and real stable atmospheric conditions with weak winds. The model assumes that nearly calm situations associated to strong stability and air stagnation, make the lowest layers of PBL poorly diffusive (Brusasca et al., 1992, Atmospheric Environment 26A, 707–723). Model results are verified against experimental data from Guardo-90 tracer experiments, an intensive field campaign conducted in the Carrion river valley (Northern Spain) to study atmospheric diffusion within a steep walled valley in mountainous terrain (Ibarra, 1992, Energia, No. 1, 74–85)." @default.
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- W2053203092 date "1997-08-01" @default.
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- W2053203092 title "Simulation of tracer dispersion from elevated and surface releases in complex terrain" @default.
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- W2053203092 doi "https://doi.org/10.1016/s1352-2310(97)00027-7" @default.
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