Comparison of ADMS 4 and LiDAR in the Prediction of Atmospheric Boundary Layer

Bachtiar, Vera Surtia Comparison of ADMS 4 and LiDAR in the Prediction of Atmospheric Boundary Layer. In: Salford Postgraduate Annual Research Conference (SPARC) 2009, May 2009, Salford, UK.

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Preview	Text B17-Prosiding - Proceeding SPARC 2009 - khusus vera.pdf Download (1MB) | Preview

Abstract

Since the late 1950s, atmospheric dispersion models have been developed to predict air quality. The Atmospheric Dispersion Modelling System (ADMS) is a dispersion model that simulates buoyant and neutrally buoyant plumes. Here the model is used to compare modelled and measured boundary layer depth in a city centre where traditionally models are not reliable. Doppler LiDAR (Light Detection and Ranging) can measure basic boundary layer variables, such as mixing depth, wind shear and turbulence, and inversion height. Comparisons are made between ADMS 4 and the Salford LiDAR for data taken in central London on 29 October 2007. On average, boundary layer height predicted by the LiDAR is higher than ADMS 4. The ADMS model has a very simple surface scheme that is not representative of a complex urban environment. The results show that there is not sufficient surface roughness within the model to produce a high enough boundary layer depth. The final aim of this research is to produce a modification to the model to enable the correct simulation of this complex terrain.

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