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| Titel |
Development and Evaluation of a Reactive-Dispersive Plume Model: TexAQS II 2006 Case Study |
| VerfasserIn |
Yong Hoon Kim, Hyun Soo Kim, Chul Han Song |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250103193
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| Publikation (Nr.) |
 EGU/EGU2015-2594.pdf |
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| Zusammenfassung |
| We describe the development and evaluation of a reactive-dispersive plume model (RDPM)
that combines a photo-chemistry model with a plume dilution driven by turbulent dispersion
of a power-plant plume. The plume transport and turbulent dispersion are derived from a
Gaussian plume model and the plume chemistry model uses 71 HxOy-NxOy-CH4
chemistry-related reactions and 184 NMHC-related reactions. Emissions from large-scale
point sources have continuously increased due to the rapid industrial growth. To extensively
understand and assess atmospheric impacts of the power-plant emissions, a general
RDPM was applied to simultaneously simulate the dynamics and photo-chemistry of
the Texas power-plant plumes. During the second Texas Air Quality Study 2006
(TexAQS II 2006) on 16 September 2006, pollutant concentrations were measured by
NOAA WP-3D aircraft with successive transects across power-plant plumes in Texas,
USA. The simulation performances of the RDPM were evaluated by a comparison
study, using the observation data obtained from the measurements of a NOAA
WP-3D flight during TexAQS II 2006 airborne field campaign. On 16 September,
the WP-3D aircraft observed mainly meteorological parameters and particulate
species concentrations, traversing the Monticello and Welsh power-plant plumes
four times from transects A to D. In addition, some meteorological variables in an
initial condition for model simulation were obtained from the Weather Research and
Forecasting (WRF) model output for the specific objects. These power-plant plume cases
were selected in this study, because a large number of nitrogen oxides and sulfur
dioxide concentrations inside the power-plant plumes were measured without any
interruption of other emission sources. For the Monticello and Welsh power-plant plumes,
the model-predicted concentrations showed good agreements with the observed
concentrations of ambient species (e.g., nitrogen oxides, ozone, sulfur dioxide,
etc.) at the four transects. Based on these RDPM results, the power-plant plume
chemistry and its possible impacts on atmospheric environments were also analyzed. |
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