Influence of thermal effects on street canyon circulations

Authors: Bohnenstengel, Sylvia; Schlünzen, Katharina Heinke; Grawe, David

Source: Meteorologische Zeitschrift, Volume 13, Number 5, October 2004 , pp. 381-386(6)

Publisher: E. Schweizerbart'sche Verlagsbuchhandlung

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Abstract:

A numerical study has been carried out to investigate the influence of large-scale thermal effects and strong local-scale temperature gradients near the ground on the circulation inside a street canyon. The results show that the dynamical forcing dominates the circulation inside a street canyon. But this forcing is influenced by the large-scale thermal stability. Thus, atmospheric stability indirectly controls the street canyon circulation. Small temperature gradients inside the street-canyon are neutralised by the external dynamical forcing. Strong temperature gradients inside the street-canyon show an impact on the street canyon circulation. While stable stratification reduces the circulation for the building configuration investigated, convective stratification seems to intensify it.

Document Type: Research article

DOI: http://dx.doi.org/10.1127/0941-2948/2004/0013-0381

Publication date: 2004-10-01

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Meteorologische Zeitschrift (originally founded in 1866) is the joint periodical of the meteorological societies of Austria, Germany and Switzerland. It accepts high-quality peer-reviewed manuscripts on all aspects of observational, theoretical and computational research out of the entire field of meteorology, including climatology. Meteorologische Zeitschrift represents a natural forum for the meteorological community of Central Europe and worldwide.
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