Počet záznamů: 1
Validation of the PALM model system 6.0 in a real urban environment: a case study in Dejvice, Prague, the Czech Republic
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SYSNO ASEP 0544772 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Validation of the PALM model system 6.0 in a real urban environment: a case study in Dejvice, Prague, the Czech Republic Tvůrce(i) Resler, Jaroslav (UIVT-O) SAI, RID, ORCID
Eben, Kryštof (UIVT-O) SAI, RID, ORCID
Geletič, Jan (UIVT-O) RID, ORCID, SAI
Krč, Pavel (UIVT-O) SAI, RID, ORCID
Rosecký, Martin (UIVT-O) SAI, RID
Sühring, M. (DE)
Belda, M. (CZ)
Fuka, V. (CZ)
Halenka, T. (CZ)
Huszár, P. (CZ)
Karlický, J. (CZ)
Benešová, N. (CZ)
Ďoubalová, J. (CZ)
Honzáková, K. (CZ)
Keder, J. (CZ)
Nápravníková, Š. (CZ)
Vlček, O. (CZ)Zdroj.dok. Geoscientific Model Development. - : Copernicus GmbH - ISSN 1991-959X
Roč. 14, č. 8 (2021), s. 4797-4842Poč.str. 46 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova urban meteorology ; air quality ; street canyon ; CFD ; LES ; PALM ; observations ; model validation Vědní obor RIV DG - Vědy o atmosféře, meteorologie Obor OECD Meteorology and atmospheric sciences CEP UH0383 GA KHP - Hlavní město Praha TO01000219 GA TA ČR - Technologická agentura ČR Způsob publikování Open access Institucionální podpora UIVT-O - RVO:67985807 UT WOS 000681689600001 EID SCOPUS 85112042776 DOI 10.5194/gmd-14-4797-2021 Anotace In recent years, the PALM 6.0 modelling system has been rapidly developing its capability to simulate physical processes within urban environments. Some examples in this regard are energy-balance solvers for building and land surfaces, a radiative transfer model to account for multiple reflections and shading, a plant-canopy model to consider the effects of plants on flow (thermo)dynamics, and a chemistry transport model to enable simulation of air quality. This study provides a thorough evaluation of modelled meteorological, air chemistry, and ground and wall-surface quantities against dedicated in situ measurements taken in an urban environment in Dejvice, Prague, the Czech Republic. Measurements included monitoring of air quality and meteorology in street canyons, surface temperature scanning with infrared cameras, and monitoring of wall heat fluxes. Large-eddy simulations (LES) using the PALM model driven by boundary conditions obtained from a mesoscale model were performed for multiple days within two summer and three winter episodes characterized by different atmospheric conditions. For the simulated episodes, the resulting temperature, wind speed, and chemical compound concentrations within street canyons show a realistic representation of the observed state, except that the LES did not adequately capture night-time cooling near the surface for certain meteorological conditions. In some situations, insufficient turbulent mixing was modelled, resulting in higher near-surface concentrations. At most of the evaluation points, the simulated surface temperature reproduces the observed surface temperature reasonably well for both absolute and daily amplitude values. However, especially for the winter episodes and for modern buildings with multilayer walls, the heat transfer through walls is not well captured in some cases, leading to discrepancies between the modelled and observed wall-surface temperature. Furthermore, the study corroborates model dependency on the accuracy of the input data. In particular, the temperatures of surfaces affected by nearby trees strongly depend on the spatial distribution of the leaf area density, land surface temperatures at grass surfaces strongly depend on the initial soil moisture, wall-surface temperatures depend on the correct setting of wall material parameters, and concentrations depend on detailed information on spatial distribution of emissions, all of which are often unavailable at sufficient accuracy. The study also points out some current model limitations, particularly the implications of representing topography and complex heterogeneous facades on a discrete Cartesian grid, and glass facades that are not fully represented in terms of radiative processes. Our findings are able to validate the representation of physical processes in PALM while also pointing out specific shortcomings. This will help to build a baseline for future developments of the model and improvements of simulations of physical processes in an urban environment. Pracoviště Ústav informatiky Kontakt Tereza Šírová, sirova@cs.cas.cz, Tel.: 266 053 800 Rok sběru 2022 Elektronická adresa http://dx.doi.org/10.5194/gmd-14-4797-2021
Počet záznamů: 1