Challenges of validating microscale LES air quality models in real urban environments: a case study for Prague city centre

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985807%3A_____%2F25%3A00638180" target="_blank" >RIV/67985807:_____/25:00638180 - isvavai.cz</a>

Výsledek na webu

<a href="https://meetingorganizer.copernicus.org/ICUC12/ICUC12-397.html" target="_blank" >https://meetingorganizer.copernicus.org/ICUC12/ICUC12-397.html</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Challenges of validating microscale LES air quality models in real urban environments: a case study for Prague city centre

Popis výsledku v původním jazyce

ZÁKLADNÍ ÚDAJE: ICUC12 Abstracts. Rotterdam: ICUC, 2025, č. článku 397.. [ICUC 2025: International Conference on Urban Climate /12./. 07.07.2025-11.07.2025, Rotterdam & online]. ABSTRAKT: Air quality deterioration in street canyons is an important issue strongly influencing human health, and the microscale LES models can provide very detailed information about its spatial and temporal structure. However, the proper model configuration and its comprehensive validation in real urban conditions still represent a significant challenge that has not been fully addressed. We present a validation campaign conducted in a traffic-laden area of Prague focusing on the detailed temporal and spatial structure of concentration fields. Almost one year of field measurements were collected with a carefully designed air quality sensor network complemented by reference and remote sensing air quality and meteorological observation tools. All measured data were consequently checked and verified. The detailed data of land cover, emissions, and meteorological conditions were provided to the PALM LES model, which was configured for the studied area in two nested domains. The comparison of the modeled and measured values showed good agreement during some episodes, while significant discrepancies were discovered in other episodes, mainly during stable meteorological situations. The identified reasons include imprecise meteorological boundary conditions, uncertain emission inputs, and insufficiently represented or neglected processes in the model. Also, the imprecision introduced by the advection numerical scheme was identified in some situations. We propose and test selected amends that improve the agreement of the model with observations. This experiment provides a knowledge base applicable to future validation campaigns and for further model development and application.

Název v anglickém jazyce

Challenges of validating microscale LES air quality models in real urban environments: a case study for Prague city centre

Popis výsledku anglicky

ZÁKLADNÍ ÚDAJE: ICUC12 Abstracts. Rotterdam: ICUC, 2025, č. článku 397.. [ICUC 2025: International Conference on Urban Climate /12./. 07.07.2025-11.07.2025, Rotterdam & online]. ABSTRAKT: Air quality deterioration in street canyons is an important issue strongly influencing human health, and the microscale LES models can provide very detailed information about its spatial and temporal structure. However, the proper model configuration and its comprehensive validation in real urban conditions still represent a significant challenge that has not been fully addressed. We present a validation campaign conducted in a traffic-laden area of Prague focusing on the detailed temporal and spatial structure of concentration fields. Almost one year of field measurements were collected with a carefully designed air quality sensor network complemented by reference and remote sensing air quality and meteorological observation tools. All measured data were consequently checked and verified. The detailed data of land cover, emissions, and meteorological conditions were provided to the PALM LES model, which was configured for the studied area in two nested domains. The comparison of the modeled and measured values showed good agreement during some episodes, while significant discrepancies were discovered in other episodes, mainly during stable meteorological situations. The identified reasons include imprecise meteorological boundary conditions, uncertain emission inputs, and insufficiently represented or neglected processes in the model. Also, the imprecision introduced by the advection numerical scheme was identified in some situations. We propose and test selected amends that improve the agreement of the model with observations. This experiment provides a knowledge base applicable to future validation campaigns and for further model development and application.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů