Multi-model comparison of urban heat island modelling approaches

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10378005" target="_blank" >RIV/00216208:11320/18:10378005 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.5194/acp-18-10655-2018" target="_blank" >https://doi.org/10.5194/acp-18-10655-2018</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/acp-18-10655-2018" target="_blank" >10.5194/acp-18-10655-2018</a>

Result language

angličtina

Original language name

Multi-model comparison of urban heat island modelling approaches

Original language description

Cities are characterized by different physical properties of surface compared to their rural counterparts, resulting in a specific regime of the meteorological phenomenon. Our study aims to evaluate the impact of typical urban surfaces on the central European urban climate in several model simulations, performed with the Weather Research and Forecasting (WRF) model and Regional Climate Model (RegCM). The specific processes occurring in the typical urban environment are described in the models by various types of urban parameterizations, greatly differing in complexity. Our results show that all models and urban parameterizations are able to reproduce the most typical urban effect, the summer evening and nocturnal urban heat island, with the average magnitude of 2-3 degrees C. The impact of cities on the wind is clearly dependent on the urban parameterization employed, with more simple ones unable to fully capture the wind speed reduction induced by the city. In the summer, a significant difference in the boundary-layer height (about 25 %) between models is detected. The urban-induced changes of temperature and wind speed are propagated into higher altitudes up to 2 km, with a decreasing tendency of their magnitudes. With the exception of the daytime in the summer, the urban environment improves the weather conditions a little with regard to the pollutant dispersion, which could lead to the partly decreased concentration of the primary pollutants.

Czech name

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Czech description

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Type

J_imp - 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

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

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

Name of the periodical

Atmospheric Chemistry and Physics

ISSN

1680-7316

e-ISSN

—

Volume of the periodical

18

Issue of the periodical within the volume

14

Country of publishing house

DE - GERMANY

Number of pages

20

Pages from-to

10655-10674

UT code for WoS article

000439962800001

EID of the result in the Scopus database

2-s2.0-85050775829