Articles | Volume 16, issue 10
https://doi.org/10.5194/acp-16-6285-2016
https://doi.org/10.5194/acp-16-6285-2016
Research article
 | 
24 May 2016
Research article |  | 24 May 2016

Evaluating the impact of built environment characteristics on urban boundary layer dynamics using an advanced stochastic approach

Jiyun Song and Zhi-Hua Wang

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Cited articles

Ali-Toudert, F. and Mayer, H.: Numerical study on the effects of aspect ratio and orientation of an urban street canyon on outdoor thermal comfort in hot and dry climate, Build. Environ., 41, 94–108, https://doi.org/10.1016/j.buildenv.2005.01.013, 2006.
Arnfield, A. J.: Two decades of urban climate research: A review of turbulence, exchanges of energy and water, and the urban heat island, Int. J. Climatol., 23, 1–26, https://doi.org/10.1002/joc.859, 2003.
Au, S.-K. and Beck, J. L.: Estimation of small failure probabilities in high dimensions by subset simulation, Probabilist. Eng. Mech., 16, 263–277, https://doi.org/10.1016/S0266-8920(01)00019-4, 2001.
Au, S.-K. and Wang, Y.: Engineering Risk Assessment with Subset Simulation, Wiley, Singapore, 336 pp., 2014.
Au, S.-K., Wang, Z.-H., and Lo, S.-M.: Compartment fire risk analysis by advanced Monte Carlo simulation, Eng. Struct., 29, 2381–2390, https://doi.org/10.1016/j.engstruct.2006.11.024, 2007.
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In this study, we found that the apparent impact of landscape changes due to urbanization is far beyond a localized effect limited in a relatively shallow layer of atmosphere above a city. Instead, it can effectively penetrate into the deep layer of atmosphere above cities up to kilometres in height. Some of the landscape characteristics, e.g., the urban morphology, even exhibit peculiar (nonlinear) effect that challenges our intuitive thinking and invites further investigations.
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