Radiative transfer budgets for scattering and absorbing plumes: Measurements and model predictions

White, William M.; Seigneur, Christian; Heinold, David W.; Richards, L.W.; Wilson, William E.; Roberts, Paul T.

doi:10.1016/0004-6981(86)90315-x

Cited by 4 publications

(1 citation statement)

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“…These plume visibility models have been extensively evaluated with field data on plume visibility. 1,3,4,5 The major weaknesses that were identified in these models include: a poor representation of actual plume dispersion, possible limitations in the representation of the particle size distribution, simplistic treatment of particulate formation, and poor performance of the diffuse field approximation in forward-scattering conditions. There is, therefore, a need…”

Section: Introductionmentioning

confidence: 99%

Formulation of a Second-Generation Reactive Plume and Visibility Model

Seigneur¹,

Wu²,

Constantinou³

et al. 1997

Journal of the Air & Waste Management Association

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The formulation of a second-generation reactive plume and visibility model, the Reactive and Optics Model of Emissions (ROME), is presented. This model presents the following improvements over existing plume visibility models. Chemical transformations in the gas phase, aqueous phase, and particles are simulated by means of a comprehensive chemical kinetic mechanism. Aerosol dynamics is simulated using a sectional representation of the aerosol size distribution. This approach allows an efficient treatment of radiative transfer calculations. Plume diffusion is treated according to several options, including a secondorder closure algorithm for instantaneous plume concentrations. ROME is applied to a case study to illustrate the relative effects of NO x and primary particulate emissions on plume visual appearance. INTRODUCTIONThe visibility of stack plumes needs to be addressed in some cases either because of regulations, such as air quality related values under Prevention of Significant Deterioration rules (Clean Air Act, Title I, Part C), or because of public concern. Existing plume visibility models that allow the simulation of plume visual appearance, such as PLUVUE II 1 and the ERT visibility model, 2 include many simplifying assumptions in their formulation of the relevant atmospheric processes. For example, plume dispersion is treated with empirical Gaussian dispersion coefficients; gas-phase chemistry is limited to reactions of the NO, NO 2 , and O 3 system; size distributions of several aerosol modes are constant and represented by lognormal distributions; particulate formation is limited to first-order oxidation of SO 2 to sulfate particles; NO 2 oxidation to nitric acid does not address particulate nitrate formation; and the radiative transfer module includes a diffuse field approximation for multiple scattering. These plume visibility models have been extensively evaluated with field data on plume visibility.

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Section: Introductionmentioning

confidence: 99%