DOI: 10.1002/2015JD024452
论文题名: Impact of urbanization patterns on the local climate of a tropical city, Singapore: An ensemble study
作者: Li X.-X. ; Koh T.-Y. ; Panda J. ; Norford L.K.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2016
卷: 121, 期: 9 起始页码: 4386
结束页码: 4403
语种: 英语
英文关键词: Anthropogenic heat
; Rainfall
; Urban canopy model
; Urban heat island
; Urbanization patterns
; Weather Research and Forecasting
Scopus关键词: anthropogenic effect
; climate change
; climate modeling
; ecosystem modeling
; heat island
; land use
; rainfall
; regional climate
; sea breeze
; tropical region
; urbanization
; weather
; weather forecasting
; Singapore [Southeast Asia]
英文摘要: The effect of urbanization and urbanization pattern on the thermal environment and local rainfall is investigated in the tropical coastal city, Singapore. The Weather Research and Forecasting (WRF) model is employed with 5 one-way nested domains and the highest horizontal resolution is 300 m. The urban effect is taken into account by a single-layer urban canopy model. Several scenarios with idealized urbanization patterns are designed and simulated for an ensemble of 28 members. In the asymmetric urbanization scenarios, in which either the southern or northern part of Singapore is urbanized while the other part is forest, the magnitude of urban heat island (UHI) intensity is higher than that in the symmetric urbanization scenario, in which the urban and forest land use is homogeneously distributed in Singapore. The anthropogenic heat (AH) associated with the urban areas will exacerbate the UHI intensity. Most of the rainfall in the examined cases occurs from late morning to afternoon when the sea breeze blows northeastward. The results suggest that sea breezes have stronger influence on the rainfall than the urbanization pattern since the downwind part always gets more rainfall than the upwind part. The urbanization and associated AH can have two opposite effects on the rainfall amount: increasing rainfall through increasing buoyancy by AH and decreasing rainfall through reducing evaporation by converting greenery to impervious surfaces. The ultimate effect is dependent on the relative strength of these two influences. © 2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62885
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: CENSAM, Singapore-MIT Alliance for Research and Technology, Singapore; UniSIM College, SIM University, Singapore; Department of Earth and Atmospheric Sciences, National Institute of Technology Rourkela, India; Department of Architecture, Massachusetts Institute of Technology, Cambridge, MA, United States
Recommended Citation:
Li X.-X.,Koh T.-Y.,Panda J.,et al. Impact of urbanization patterns on the local climate of a tropical city, Singapore: An ensemble study[J]. Journal of Geophysical Research: Atmospheres,2016-01-01,121(9)