DOI: 10.1002/joc.5885
Scopus记录号: 2-s2.0-85056334635
论文题名: Semi-idealized urban heat advection simulations using the Weather Research and Forecasting mesoscale model
作者: Bassett R. ; Cai X. ; Chapman L. ; Heaviside C. ; Thornes J.E.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
卷: 39, 期: 3 起始页码: 1345
结束页码: 1358
语种: 英语
英文关键词: BEP
; mesoscale modelling
; semi-idealized
; urban heat advection
; urban heat island
; WRF
Scopus关键词: Advection
; Land use
; Landforms
; Numerical models
; Weather forecasting
; Wind
; Climate impact assessment
; Computation intensives
; Heat advection
; Mesoscale modelling
; Meteorological fields
; semi-idealized
; Urban heat island
; Weather research and forecasting
; Atmospheric temperature
英文摘要: Urban heat advection (UHA) can extend the climatic impact of a city into the surrounding countryside. This may lead to an intensification of already well-documented urban heat island (UHI) impacts on health and infrastructure, and challenge the representativeness of long-term reference temperature records taken near urban areas. However, previous UHA studies have been unable to accurately quantify surface-level UHA due to challenges arising from complex urban land-use patterns. To address this, the numerical Weather Research and Forecasting (WRF) mesoscale model coupled with the Building Energy Parameterization urban canopy scheme is used to simulate meteorological fields for idealized land-use cases. Hypothetical square cities (up to 32 km in size) are simulated for a year's period. A time-mean 2-m temperature field (representing the canopy UHI) shows that the mean UHI intensity (up to 4.3 °C [SD 1.7 °C]), wind speed <3.9 m/s) is linearly related to the logarithm of city size. This finding, entirely derived from numerical modelling, is consistent with the log-linear relationships previously found in the observational data of many cities in the world. A UHA methodology was then applied to the temperature fields to separate UHA from the UHI, with up to 2.9 °C (SD 1.7 °C) of UHA found downwind of the largest city size. For this hypothetical city size, an UHA intensity of 0.5 °C is found up to 24-km downwind from the urban boundary. In addition, the UHA-distance profiles along the central horizontal transect for various urban sizes are found to follow a scaling rule as a good approximation. As a result, the findings of this paper can be used as a starting point for climate impact assessments for areas surrounding urban areas without the need for complex, computation-intensive simulations. © 2018 The Authors. International Journal of Climatology published by John Wiley & Sons Ltd on behalf of the Royal Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116534
Appears in Collections: 全球变化的国际研究计划
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作者单位: School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom; Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom; Chemicals and Environmental Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Didcot, United Kingdom
Recommended Citation:
Bassett R.,Cai X.,Chapman L.,et al. Semi-idealized urban heat advection simulations using the Weather Research and Forecasting mesoscale model[J]. International Journal of Climatology,2019-01-01,39(3)