Authors: D.R. Middleton
Addresses: Senior Scientist, Atmospheric Dispersion Group, Met Office, FitzRoy Road, Exeter Devon EX1 3PB, UK
Abstract: Regulatory dispersion modelling uses hourly synoptic observations (OBS) from a nearby station. Alternatively, hourly Numerical Weather Prediction (NWP) data are useable in air quality management. In parallel runs, OBS data and NWP (two grid scales, ∼60 km and ∼12 km) were input to the meteorological pre-processor of the Met Office NAME III dispersion model. Frequency distribution results for dispersion parameters including wind speed, friction velocity, heat flux, Monin Obukhov length and Boundary Layer Depth (BLD) have been analysed because they influence dispersion calculations. New stability maps compared dispersion climatology from NWP with pre-processor results using OBS data.
Keywords: NWP; numerical weather prediction; dispersion modelling; pre-processors; Weibull; BLD; boundary layer depth; friction velocity; heat flux; stability maps; NAME III; pollutant dispersion; air quality; air pollution; wind speed.
International Journal of Environment and Pollution, 2011 Vol.47 No.1/2/3/4, pp.10 - 25
Received: 08 May 2021
Accepted: 12 May 2021
Published online: 09 Jun 2012 *