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| Titel |
How does particle formation in coal-fired power-plant plumes depend on environmental factors? |
| VerfasserIn |
Jeffrey Pierce, Robin Stevens, Charles Brock |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250043027
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| Zusammenfassung |
| Within the past ten years, global and regional chemical-transport models with online aerosol
microphysics have become powerful tools for understanding how humans may be changing
aerosols, clouds and climate. However, large uncertainties in processes such as
new-particle formation and emissions limit the predictive ability of these models.
Related to both of these uncertainties is the question of how to represent sub-grid
aerosol processes in large-scale models with grid-box lengths of 10s of km or larger.
Sub-grid SO2 oxidation in coal-fired power-plant plumes with condensation of
H2SO4 onto newly-formed and existing particles is an important example of these
difficult sub-grid aerosol processes. We have developed a modeling framework
with aerosol microphysics in the System for Atmospheric Modelling (SAM)(1), a
Large-Eddy Simulation/Cloud-Resolving Model (LES/CRM), to explore these plumes in
detail and develop parameterizations of plume microphysics for global and regional
models. We evaluate the model with airborne data obtained in the plumes of various
coal-fired power plants (2). Finally, we show how the effective downwind plume aerosol
emissions can be greatly modified by both meteorological and background aerosol
conditions.
(1) Khairoutdinov, M. F., and D.A. Randall,. J. Atmos. Sci., 60, 607-625, 2003.
(2) Parrish, D. D., et al., J. Geophys. Res., 11, D00F13, 2009 |
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