DOI: 10.1002/2015GL067628
论文题名: Sensitivity of urban rainfall to anthropogenic heat flux: A numerical experiment
作者: Holst C.C. ; Tam C.-Y. ; Chan J.C.L.
刊名: Geophysical Research Letters
ISSN: 0094-9303
EISSN: 1944-9034
出版年: 2016
卷: 43, 期: 5 起始页码: 2240
结束页码: 2248
语种: 英语
英文关键词: anthropogenic heat flux
; cloud-resolving model simulations
; extreme rainfall
; urban effects
Scopus关键词: Atmospheric thermodynamics
; Boundary layers
; Buoyancy
; Hurricane effects
; Precipitation (meteorology)
; Rain
; Turbulence
; Anthropogenic heat flux
; Cloud-resolving model simulations
; Extreme rainfall
; Numerical experiments
; Pearl River Delta region
; Planetary boundary layers
; Turbulence productions
; Urban effect
; Heat flux
英文摘要: In this paper we investigate the sensitivity of local precipitation statistics to surface heat fluxes in an urban subdomain in the Pearl River Delta region, which is situated along the coast of south China. By conducting simulations of a past record-breaking rainfall event with a cloud-resolving model, we found that rainfall rates and the spatial distribution of accumulated rainfall are very sensitive to imposed urban surface heat fluxes. Diagnostics of the planetary boundary layer show increasing fluctuations of turbulence and buoyant turbulence production with increasing surface heat emission, causing increased near-surface mixing and convection. Heavy precipitation rates show a higher sensitivity than lighter rates. The extreme tail of the distribution is hence more affected. This study serves as an example of how sensitive the magnitude of local high impact weather phenomena can be to local forcing. © 2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959469469&doi=10.1002%2f2015GL067628&partnerID=40&md5=4a96b58bd65319031ac10e4512360d58
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10266
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: School of Energy and Environment, City University of Hong Kong, Hong Kong
Recommended Citation:
Holst C.C.,Tam C.-Y.,Chan J.C.L.. Sensitivity of urban rainfall to anthropogenic heat flux: A numerical experiment[J]. Geophysical Research Letters,2016-01-01,43(5).