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| Titel |
Development and Implementation of an Online Chemistry Module to a Large Eddy Simulation Model |
| VerfasserIn |
Renate Forkel, Sabine Banzhaf, Farah Kanani-Sühring, Klaus Ketelsen, Basit Khan, Björn Maronga, Matthias Mauder, Siegfried Raasch |
| 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 |
250144803
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| Publikation (Nr.) |
 EGU/EGU2017-8672.pdf |
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| Zusammenfassung |
| Large Eddy Simulation (LES) models permit to resolve relevant scales of turbulent motion,
so that these models can capture the inherent unsteadiness of atmospheric turbulence and
advection. However, LES models are so far hardly applied for urban air quality studies, in
particular chemical transformation of pollutants. Within the BMBF (Bundesministerium für
Bildung und Forschung) funded joint project MOSAIK (Modellbasierte Stadtplanung und
Anwendung im Klimawandel / Model-based city planning and application in climate change)
the state of the art LES model PALM (Parallelized LES Model; Maronga et al, 2015, Geosci.
Model Dev., 8, doi:10.5194/gmd-8-2515-2015) is extended by an atmospheric chemistry
scheme. Due to the high computational demands of a LES based model, compromises in the
description of chemical processes are required. Therefore, a reduced chemistry mechanism,
which includes only major pollutants namely O3, NO, NO2, CO, a highly simplified VOC
chemistry and a small number of products have been implemented. For practical applications,
our approach is to go beyond the simulation of single street canyons to chemical
transformation, advection and deposition of air pollutants in the larger urban canopy. Tests of
chemistry schemes and initial studies of chemistry-turbulence interactions are presented. |
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