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Micro-scale modelling of the urban wind speed for air pollution applications

Ottosen, Thor-Bjørn, Ketzel, Matthias, Skov, Henrik, Hertel, Ole, Brandt, Jørgen and Kakosimos, Konstantinos E. (2019) Micro-scale modelling of the urban wind speed for air pollution applications Scientific Reports, 9 (1).

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Modelling wind speeds in urban areas have many applications e.g. in relation to assessment of wind energy, modelling air pollution, and building design and engineering. Models for extrapolating the urban wind speed exist, but little attention has been paid to the influence of the upwind terrain and the foundations for the extrapolation schemes. To analyse the influence of the upwind terrain and the foundations for the extrapolation of the urban wind speed, measurements from six urban and nonurban stations were explored, and a model for the urban wind speed with and without upwind influence was developed and validated. The agreement between the wind directions at the stations is found to be good, and the influence of atmospheric stability, horizontal temperature gradients, land-sea breeze, temperature, global radiation and Monin-Obukhov Length is found to be small, although future work should explore if this is valid for other urban areas. Moreover, the model is found to perform reasonably well, but the upwind influence is overestimated. Areas of model improvement are thus identified. The upwind terrain thus influences the modelling of the urban wind speed to a large extent, and the fundamental assumptions for the extrapolation scheme are fulfilled for this specific case.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
Ottosen, Thor-Bjørn
Skov, Henrik
Hertel, Ole
Brandt, Jørgen
Kakosimos, Konstantinos E.
Date : 3 October 2019
DOI : 10.1038/s41598-019-50033-2
Copyright Disclaimer : © The Author(s) 2019. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Depositing User : Diane Maxfield
Date Deposited : 07 Nov 2019 13:04
Last Modified : 07 Nov 2019 13:04

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