First European community Campaign for remote sensing of atmospheric pollution, LACQ (France), 7–11 July 1975

Guillot, Pierre; Bonometti, G; Hasenjaeger, H; Meulen, A. van der; Hamilton, P.M.; Haulet, R.; Laurent, J.; Sandroni, S.; Cerutti, C.; Giovanelli, G.; Tirabassi, T.; Vittori, O.; Piccinini, P

doi:10.1016/0004-6981(79)90001-5

“…plume as a tracer of opportunity of the lower atmosphere, it was possible to track the daily evolution of the wind field and the dispersive conditions (as previously performed in other experiments in different regions, Millán et al, 1979;Guillot et al, 1979;Chung et al, 1981;Hoff et al, 1982;Portelli, 1982;Millán et al, 1987;Eastman et al, 1995;Palau, 2003).…”

Section: Methodsmentioning

confidence: 96%

The importance of meteorological scales to forecast air pollution scenarios on coastal complex terrain

Palau

¹

,

Pérez-Landa

²

,

Diéguez

³

et al. 2005

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Abstract. Some of the meteorological approaches commonly considered in urban air pollution models do not take into account the importance of the smaller scales in the meteorology of complex-terrain coastal sites. The aim of this work is to estimate the impact of using the proper meteorological scales when simulating the behaviour of the pollutant concentrations emitted in the lower layers over coastal complex terrain areas. The availability of experimental measurements of a power plant plume near the Castellón conurbation (on the Spanish Mediterranean coast) has allowed us to use this plume as a tracer of opportunity of the lower atmosphere to check the results of a simulation exercise using the RAMS mesoscale model coupled to the HYPACT particle model. The results obtained show that in a complex-terrain coastal site, because of the strong effect of the meteorological interactions between the different scales on the integral advection and the turbulent dispersion of pollutants, using an inadequate scale to solve the meteorology can result in a very big gap in the simulation of lower-layer pollutant behaviour at urban scales.

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“…Besides, by using the plume transport direction aloft as a tracer of opportunity of the wind field at the plume (air pollutants) transport height, it is possible to identify the diurnal advective regimes in the mid-troposphere. Previous studies in different climatological and geographical regions have already used plume transport directions aloft to track the main dispersive characteristics and daily evolution of the windfield at the plume transport height (Millán, 1979;Guillot et al, 1979;Chung et al, 1981;Hoff et al, 1982;Portelli, 1982;Millán et al, 1987;Eastman et al, 1995;Palau et al, 2005). This availability of measurements aloft, obtained by means of a vehicle equipped with a COSPEC remote sensor, represents a clear advantage over the information provided by the fixed ground-level monitoring stations for atmospheric pollutant control, especially on mid-latitude complex terrain (where vertical wind directional shear is the most persistent pattern).…”

Section: Acpdmentioning

confidence: 99%

A study of dispersion in complex terrain under winter conditions using high-resolution mesoscale and Lagrangian particle models

Palau¹,

Pérez-Landa²,

Meliá³

et al. 2005

Preprint

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Abstract. A mesoscale model (MM5), a dispersive Langrangian particle model (FLEXPART), and intensive meteorological and COrrelation SPECtrometer (COSPEC) measurements from a field campaign are used to examine the advection and turbulent diffusion patterns associated with interactions and forcings between topography, synoptic atmospheric flows and thermally-driven circulations. This study describes the atmospheric dispersion of emissions from a power plant with a 343-meter-tall chimney, situated on very complex terrain in the North-East of Spain, under winter conditions. During the field campaign, the plume was transported with low transversal dispersion and deformed essentially due to the effect of mechanical turbulence. The main surface impacts appeared at long distances from the emission source (more than 30 km). The results show that the coupled models (MM5 and FLEXPART) are able to predict the plume integral advection from the power plant on very complex terrain. Integral advection and turbulent dispersion are derived from the dispersive Lagrangian model output for three consecutive days so that a direct quantitative comparison has been made between the temporal evolution of the predicted three-dimensional dispersive conditions and the COSPEC measurements. Comparison between experimental and simulated transversal dispersion shows an index of agreement between 80% and 90%, within distance ranges from 6 to 33 km from the stack. Linked to the orographic features, the simulated plume impacts on the ground more than 30 km away from the stack, because of the lee waves simulated by MM5.

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“…Measurements were taken throughout the day to record any changes that might occur in the plume transport direction or in the dispersive conditions. Thus, using this plume as a tracer of opportunity of the lower atmosphere, it was possible to track the daily evolution of the wind field and the dispersive conditions (as previously performed in other experiments in different regions, Millán et al, 1979;Guillot et al, 1979;Chung et al, 1981;Hoff et al, 1982;Portelli, 1982;Millán et al, 1987;Eastman et al, 1995;Palau, 2003).…”

Section: Methodsmentioning

confidence: 97%

The importance of meteorological scales to forecast air pollution scenarios on a complex-terrain coastal site of the Iberian Peninsula

Palau¹,

Pérez-Landa²,

Diéguez³

et al. 2005

Preprint

View full text Add to dashboard Cite

Abstract. Some of the meteorological approaches commonly considered in urban air pollution models do not take into account the importance of the smaller scales in the meteorology of complex-terrain coastal sites. The aim of this work is to estimate the impact of using the proper meteorological scales when simulating the behaviour of the pollutant concentrations emitted in the lower layers over coastal complex terrain areas. The availability of experimental measurements of a power plant plume near the Castellón conurbation (on the Spanish Mediterranean coast) has allowed us to use this plume as a tracer of opportunity of the lower atmosphere to check the results of a simulation exercise using the RAMS mesoscale model coupled to the HYPACT particle model. The results obtained show that in a complex-terrain coastal site, because of the strong effect of the meteorological interactions between the different scales on the integral advection and the turbulent dispersion of pollutants, using an inadequate scale to solve the meteorology can result in a very big gap in the simulation of lower-layer pollutant behaviour at urban scales.

show abstract

First European community Campaign for remote sensing of atmospheric pollution, LACQ (France), 7–11 July 1975

Cited by 16 publications

References 11 publications

The importance of meteorological scales to forecast air pollution scenarios on coastal complex terrain

The importance of meteorological scales to forecast air pollution scenarios on coastal complex terrain

A study of dispersion in complex terrain under winter conditions using high-resolution mesoscale and Lagrangian particle models

The importance of meteorological scales to forecast air pollution scenarios on a complex-terrain coastal site of the Iberian Peninsula

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