Challenges of high-fidelity air quality modeling in urban environments – PALM sensitivity study during stable conditions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985807%3A_____%2F24%3A00599999" target="_blank" >RIV/67985807:_____/24:00599999 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/24:10489843
Result on the web
<a href="https://doi.org/10.5194/gmd-17-7513-2024" target="_blank" >https://doi.org/10.5194/gmd-17-7513-2024</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.5194/gmd-17-7513-2024" target="_blank" >10.5194/gmd-17-7513-2024</a>
Alternative languages
Result language
angličtina
Original language name
Challenges of high-fidelity air quality modeling in urban environments – PALM sensitivity study during stable conditions
Original language description
Urban air quality is an important part of human well-being, and its detailed and precise modeling is important for efficient urban planning. In this study the potential sources of errors in large eddy simulation (LES) runs of the PALM model in stable conditions for a high-traffic residential area in Prague, Czech Republic, with a focus on street canyon ventilation, are investigated. The evaluation of the PALM model simulations against observations obtained during a dedicated campaign revealed unrealistically high concentrations of modeled air pollutants for a short period during a winter inversion episode. To identify potential reasons, the sensitivities of the model to changes in meteorological boundary conditions and adjustments of model parameters were tested. The model adaptations included adding the anthropogenic heat from cars, setting a bottom limit of the subgrid-scale turbulent kinetic energy (TKE), adjusting the profiles of parameters of the synthetic turbulence generator in PALM, and limiting the model time step. The study confirmed the crucial role of the correct meteorological boundary conditions for realistic air quality modeling during stable conditions. Besides this, the studied adjustments of the model parameters proved to have a significant impact in these stable conditions, resulting in a decrease in concentration overestimation in the range 30 %–66 % while exhibiting a negligible influence on model results during the rest of the episode. This suggested that the inclusion or improvement of these processes in PALM is desirable despite their negligible impact in most other conditions. Moreover, the time step limitation test revealed numerical inaccuracies caused by discretization errors which occurred during such extremely stable conditions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10509 - Meteorology and atmospheric sciences
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Geoscientific Model Development
ISSN
1991-959X
e-ISSN
1991-9603
Volume of the periodical
17
Issue of the periodical within the volume
20
Country of publishing house
DE - GERMANY
Number of pages
25
Pages from-to
7513-7537
UT code for WoS article
001344326600001
EID of the result in the Scopus database
2-s2.0-85209079756