A LAGRANGIAN PARTICLE MODEL WITH CHEMICAL REACTIONS: APPLICATION IN REAL ATMOSPHERE
Item
Title (Dublin Core)
eng
A LAGRANGIAN PARTICLE MODEL WITH CHEMICAL REACTIONS: APPLICATION IN REAL ATMOSPHERE
Description (Dublin Core)
eng
In this work a lagrangian particle model able to account for simple chemical reactions between NO and O3 (Alessandrini
et al., 2007) has been improved in order to consider the photolysis of NO2. A system of chemical equations is numerically solved on
an eulerian grid, while the particles trajectories are moved in a lagrangian frame. The NOx emissions of a power plant in real
atmosphere, situated in a complex topography environment, have been considered as a test case. The meteorological model RAMS
has been applied to build the wind field together with the interface code MIRS to compute turbulence parameters, requested for the
dispersion simulations. The plume transitions over an air quality station, allowing for a comparison between the measured and
computed concentrations of all the reaction’s compounds (NO, NO2 and O3), have been simulated by the lagrangian particle model.
The simulated episodes refer to the diurnal time, when the ultraviolet radiation activates the NO2 photolysis making necessary the
model complete set of chemical equations. In order to reduce computational cost and improve the accuracy of the background O3
concentration representation, the concept of concentration deficit carried by the particles is proposed and tested. This new method
does not need to release a big amount of particles filling the whole domain, but only the inside plume particles should be accounted
for. Comparisons between NO/NO2’s concentrations ratio are presented in term of scatter plots and statistical indexes analysis. The
satisfactory results suggest that the model can be used in practical applications in real atmosphere also for regulatory purposes when
the NO2 concentration limits are imposed by the legislation.
et al., 2007) has been improved in order to consider the photolysis of NO2. A system of chemical equations is numerically solved on
an eulerian grid, while the particles trajectories are moved in a lagrangian frame. The NOx emissions of a power plant in real
atmosphere, situated in a complex topography environment, have been considered as a test case. The meteorological model RAMS
has been applied to build the wind field together with the interface code MIRS to compute turbulence parameters, requested for the
dispersion simulations. The plume transitions over an air quality station, allowing for a comparison between the measured and
computed concentrations of all the reaction’s compounds (NO, NO2 and O3), have been simulated by the lagrangian particle model.
The simulated episodes refer to the diurnal time, when the ultraviolet radiation activates the NO2 photolysis making necessary the
model complete set of chemical equations. In order to reduce computational cost and improve the accuracy of the background O3
concentration representation, the concept of concentration deficit carried by the particles is proposed and tested. This new method
does not need to release a big amount of particles filling the whole domain, but only the inside plume particles should be accounted
for. Comparisons between NO/NO2’s concentrations ratio are presented in term of scatter plots and statistical indexes analysis. The
satisfactory results suggest that the model can be used in practical applications in real atmosphere also for regulatory purposes when
the NO2 concentration limits are imposed by the legislation.
Creator (Dublin Core)
Alessandrini, Stefano
Ferrero, Enrico
Subject (Dublin Core)
eng
Atmospheric dispersion;NO;chemistry model;Lagrangian Particle Model;photo-stationary equilibrium
Publisher (Dublin Core)
Croatian meteorological society
Date (Dublin Core)
2008
Type (Dublin Core)
text
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://hrcak.srce.hr/64248
eng
https://hrcak.srce.hr/file/96365
Source (Dublin Core)
Hrvatski meteorološki časopis
ISSN 1330-0083 (Print)
ISSN 1849-0700 (Online)
Volume 43
Issue 43/1
Language (Dublin Core)
eng
Rights (Dublin Core)
info:eu-repo/semantics/openAccess
The papers of this Journal are free of charge for personal or educational use, with respect of copyright of authors and publisher.