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| Titel |
Ultrafine particles from power plants: Evaluation of WRF-Chem simulations with airborne measurements |
| VerfasserIn |
Renate Forkel, Wolfgang Junkermann |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250144900
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| Publikation (Nr.) |
 EGU/EGU2017-8778.pdf |
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| Zusammenfassung |
| Ultrafine particles (UFP, particles with a diameter < 100 nm) are an acknowledged risk to
human health and have a potential effect on climate as their presence affects the
number concentration of cloud condensation nuclei. Despite of the possibly hazardous
effects no regulations exist for this size class of ambient air pollution particles.
While ground based continuous measurements of UFP are performed in Germany at
several sites (e.g. the German Ultrafine Aerosol Network GUAN, Birmili et al. 2016,
doi:10.5194/essd-8-355-2016) information about the vertical distribution of UFP within
the atmospheric boundary layer is only scarce. This gap has been closed during
the last years by regional-scale airborne surveys for UFP concentrations and size
distributions over Germany (Junkermann et al., 2016, doi: 10.3402/tellusb.v68.29250) and
Australia (Junkermann and Hacker, 2015, doi: 10.3402/tellusb.v67.25308). Power
stations and refineries have been identified as a major source of UFP in Germany
with observed particle concentrations > 50000 particles cm−3 downwind of these
elevated point sources. Nested WRF-Chem simulations with 2 km grid width for the
innermost domain are performed with UFP emission source strengths derived from
the measurements in order to study the advection and vertical exchange of UFP
from power plants near the Czech and Polish border and their impact on planetary
boundary layer particle patterns. The simulations are evaluated against the airborne
observations and the downward mixing of the UFP from the elevated sources is studied. |
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