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SIMULATION OF ATMOSPHERIC FLOW IN A COMPLEX TERRAIN REGION:

APPLICATION AND EVALUATION OF A MESOSCALE ATMOSPHERIC MODEL

K. RADOS1, G. KALAMPOUKAS1, S. ZORAS2 AND A. TRIANTAFYLLOU2

1Pollution Control Technologies Department, TEI of West Macedonia 2Atmospheric Pollution and Environmental Physics Laboratory, TEI of West Macedonia

ABSTRACT The present paper demonstrates part of an effort towards the development of a forecasting system to provide

short-term forecasts (up to 72 hours ahead) of air-quality distributions over the highly complex terrain of West Macedonia. As a first step towards this aim, the Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS) is applied at high resolution over the wider area. COAMPS is a three-dimensional non-hydrostatic atmospheric model developed at the US Naval Research Laboratory. The model includes an embedded aerosol tracer module which calculates the dynamics and major physics of aerosols and tracers. In the present paper, COAMPS is applied at high resolution over the wider region of West Macedonia for a specific heavily polluted period August, 19-21 2006. The tracers emitted from the power stations are treated as passive substances (particulate matter-fly ash). Simulation results are processed and evaluated through comparisons with available observations. Moreover, plots of the tracer plumes from COAMPS are used to visualize the transport phenomena. Encouraging conclusions are drawn regarding the implementation of a NWP model with an embedded aerosol tracer module in an operational mode to forecast air-quality in complex terrain areas. However, further evaluation is certainly required against observations on the atmospheric boundary layer development which has not been well understood yet over complex terrain areas, in terms of stability and turbulence effects.

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NRL/PU/7500�03-448. Hodur, R.M., 1997: The Naval Research Laboratory�s Coupled Ocean/Atmosphere Mesoscale Prediction

System (COAMPS), Mon. Wea. Rev., 125, 1414-1430. Khelif, D., Friehe, C.A., Jonsson, H., Wang, Q., Rados, K.G. 2005: Wintertime Boundary-Layer

Structure an Air-Sea Interaction Over the Japan/East Sea, Deep Sea Research II, 52, 1525-1546. Perivolaris, Y., Vougiouka, A., Alafouzos, V., Mourikis, D., Zagorakis, V., Rados, K., Barkouta, D.,

Zervos, A. and Wang, Q., 2006: Coupling of a Mesoscale Atmospheric Prediction System with a CFD Microclimatic Model for Production Forecasting of Wind Farms in Complex Terrain: Test Case in the Island of Evia, Proc. of the Europ. Wind Energy Conf. EWEC, Athens.

Rados, K., Wang, Q., Kalogiros, J. and Lange, B. 2002: Evaluation of boundary layer parameterizations in a mesoscale model for offshore wind energy applications, Global WindPower Conference, Paris.

Rados, K.G., Perivolaris, Y., Vougiouka, A., Venezis, K., Karalis, G. and Zervos, A., 2007: Application of a mesoscale weather prediction model for short-term forecasting of power production of wind farms in complex terrain - test case: island of Crete, Proc. CEST2007, Cos island, Greece.

Triantafyllou, A.G. and Kassomenos, P.A., 2002: Aspects of atmospheric flow and dispersion of air pollutants in a mountainous basin, The Science of the Total Environment, 297, 85-103.

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