DOI: 10.1002/joc.5989
Scopus记录号: 2-s2.0-85061037016
论文题名: Summertime surface energy balance fluxes at two Beijing sites
作者: Dou J. ; Grimmond S. ; Cheng Z. ; Miao S. ; Feng D. ; Liao M.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2019
语种: 英语
英文关键词: Beijing
; Bowen ratio
; external water
; radiative fluxes
; turbulent heat fluxes
Scopus关键词: Air cleaners
; Air conditioning
; Climate change
; Climate models
; Heat flux
; Interfacial energy
; Atmospheric transmissivity
; Beijing
; Bowen ratio
; Outgoing longwave radiation
; Radiative fluxes
; Turbulent heat fluxes
; Urban and suburban areas
; Urban Planning Strategies
; Urban growth
英文摘要: Summertime (June–August 2015) radiative and turbulent heat fluxes were measured concurrently at two sites (urban and suburban) in Beijing. The urban site has slightly lower incoming and outgoing shortwave radiation, lower atmospheric transmissivity and a lower surface albedo than the suburban site. Both sites receive similar incoming longwave radiation. Although the suburban site had larger daytime outgoing longwave radiation (L ↑ ), differences in the daily mean L ↑ values are small, as the urban site has higher nocturnal L ↑ . Overall, both the midday and daily mean net all-wave radiation (Q * ) for the two sites are nearly equal. However, there are significant differences between the sites in the surface energy partitioning. The urban site has smaller turbulent sensible heat (Q H ) (21–25% of Q * [midday–daily]) and latent heat (Q E ) fluxes (21–45% of Q * ). Whereas, the suburban proportions of Q * are Q H 32–32% and Q E 39–66%. The daily (midday) mean Bowen ratio (Q H /Q E ) was 0.56 and 0.49 (0.98 and 0.83) for the urban and suburban sites, respectively. These values are low compared with other urban and suburban areas with similar or larger fractions of vegetated cover. Likely, these are caused by the widespread external water use for road cleaning/wetting, greenbelts, and air conditioners. Our suburban site has quite different land cover to most previous suburban studies as crop irrigation supplements rainfall. These results are important in enhancing our understanding of surface–atmosphere energy exchanges in Chinese cities and can aid the development and evaluation of urban climate models and inform urban planning strategies in the context of rapid global urbanization and climate change. © 2019 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116644
Appears in Collections: 全球变化的国际研究计划
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作者单位: Urban Boundary-Layer & Atmospheric Environment Branch, Institute of Urban Meteorology, China Meteorological Administration, Beijing, China; Department of Meteorology, University of Reading, Reading, United Kingdom; Meteorological Service Branch, Miyun Meteorological Station, Beijing Meteorological Bureau, Beijing, China
Recommended Citation:
Dou J.,Grimmond S.,Cheng Z.,et al. Summertime surface energy balance fluxes at two Beijing sites[J]. International Journal of Climatology,2019-01-01