DOI: 10.1002/2017JD027845
Scopus记录号: 2-s2.0-85043388105
论文题名: Quantifying Water and Energy Fluxes Over Different Urban Land Covers in Phoenix, Arizona
作者: Templeton N.P. ; Vivoni E.R. ; Wang Z.-H. ; Schreiner-McGraw A.P.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 4 起始页码: 2111
结束页码: 2128
语种: 英语
英文关键词: eddy covariance
; evapotranspiration
; irrigation
; land cover
; turbulent fluxes
; urban energy balance
Scopus关键词: arid region
; boundary layer
; eddy covariance
; energy balance
; evapotranspiration
; grass
; irrigation system
; land cover
; latent heat flux
; neighborhood
; precipitation (climatology)
; soil temperature
; suburban area
; surface energy
; urban area
; Arizona
; Phoenix
; United States
英文摘要: The impact of urbanization on water and energy fluxes varies according to the characteristics of the urban patch type. Nevertheless, urban flux observations are limited, particularly in arid climates, given the wide variety of land cover present in cities. To help address this need, a mobile eddy covariance tower was deployed at three locations in Phoenix, Arizona, to sample the surface energy balance at a parking lot, a xeric landscaping (irrigated trees with gravel) and a mesic landscaping (irrigated turf grass). These deployments were compared to a stationary eddy covariance tower in a suburban neighborhood. A comparison of the observations revealed key differences between the mobile and reference sites tied to the urban land cover within the measurement footprints. For instance, the net radiation varied substantially among the sites in manners consistent with albedo and shallow soil temperature differences. The partitioning of available energy between sensible and latent heat fluxes was modulated strongly by the presence of outdoor water use, with the irrigated turf grass exhibiting the highest evaporative fraction. At this site, we identified a lack of sensitivity of turbulent flux partitioning to precipitation events, which suggests that frequent outdoor water use removes water limitations in an arid climate, thus leading to mesic conditions. Other urban land covers with less irrigation, however, exhibited sensitivity to the occurrence of precipitation, as expected for an arid climate. As a result, quantifying the frequency and magnitude of outdoor water use is critical for understanding evapotranspiration losses in arid urban areas. ©2018. 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/114442
Appears in Collections: 气候减缓与适应
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作者单位: School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, United States; School of Earth and Space Exploration, Arizona State University, Tempe, AZ, United States
Recommended Citation:
Templeton N.P.,Vivoni E.R.,Wang Z.-H.,et al. Quantifying Water and Energy Fluxes Over Different Urban Land Covers in Phoenix, Arizona[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(4)