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Changes in wind speed under heat waves enhance urban heat islands in the Beijing Metropolitan Area

Li, D., Sun, T., Liu, M., Wang, L. and Gao, Z. (2016) Changes in wind speed under heat waves enhance urban heat islands in the Beijing Metropolitan Area. Journal of Applied Meteorology and Climatology, 55 (11). pp. 2369-2375. ISSN 1558-8432

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To link to this item DOI: 10.1175/JAMC-D-16-0102.1

Abstract/Summary

The interaction between urban heat islands (UHIs) and heat waves (HWs) is studied using measurements collected at two towers in the Beijing, China, metropolitan area and an analytical model. Measurements show that 1) the positive interaction between UHIs and HWs not only exists at the surface but also persists to higher levels (up to ~70 m) and 2) the urban wind speed is enhanced by HWs during daytime but reduced during nighttime as compared with its rural counterpart. A steady-state advection–diffusion model coupled to the surface energy balance equation is then employed to understand the implication of changes in wind speed on UHIs, which reveals that the observed changes in wind speed positively contribute to the interaction between UHIs and HWs in both daytime and nighttime. The vertical structure of the positive interaction between UHIs and HWs is thus likely an outcome resulting from a combination of changes in the surface energy balance and wind profile.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:71094
Publisher:American Meteorological Society

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