Arid
DOI10.1175/JAM2220.1
Evaluation of urban surface energy fluxes using an open-air scale model
Pearlmutter, D; Berliner, P; Shaviv, E
通讯作者Pearlmutter, D
来源期刊JOURNAL OF APPLIED METEOROLOGY
ISSN0894-8763
出版年2005
卷号44期号:4页码:532-545
英文摘要

The thermal behavior of an urban surface is crucial to understand, but it is difficult to predict using conventional measurement or modeling approaches. In this study, an integrated method is proposed for evaluating urban energy exchanges with an open-air scale model of a building-street canyon surface array. The technique, which potentially combines the flexibility of modeling with the reliability of empirical observation under natural turbulence and radiative loading, is tested in hot, arid summer conditions to gauge its ability for reproducing surface-atmosphere energy fluxes that are representative of diurnal patterns in actual urban settings. After identifying the inertial sublayer, which is created above the scaled roughness array at a point near its downwind edge, roughness parameters utilized in the calculation of turbulent sensible heat flux are determined for two different array configurations of varying frontal area density and compared with existing data from field studies and morphometric models. For each geometric configuration, the relative sharing of radiant energy between storage and turbulent fluxes is compared with published findings obtained by conventional methods, as is the diurnal pattern of each component flux. Roughness parameters that are obtained conform to the expected ranges, as do daytime and overall daily fluxes and flux ratios. Overall, radiation absorption and heat storage are higher in the array with deeper canyons, and in both arrays the share of sensible heat channeled into the atmosphere is both higher in magnitude and later in reaching its peak intensity than that which is stored within the scaled urban fabric. This thermal time lag, when evaluated by fitting data to a published model for parameterizing heat storage from net radiation, shows a high correlation with hysteresis behavior in actual cities.


类型Article
语种英语
国家Israel
收录类别SCI-E
WOS记录号WOS:000228975400010
WOS关键词NEAR-WALL FLOW ; HEAT-STORAGE ; ROUGHNESS PARAMETERS ; ATMOSPHERIC MODELS ; CANOPY-LAYER ; BALANCE ; CANYON ; AREAS ; TURBULENCE ; BUDGET
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
来源机构Ben-Gurion University of the Negev
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/149386
作者单位(1)Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Sede Boqer, Israel;(2)Technion Israel Inst Technol, Fac Arch & Town Planning, Haifa, Israel
推荐引用方式
GB/T 7714
Pearlmutter, D,Berliner, P,Shaviv, E. Evaluation of urban surface energy fluxes using an open-air scale model[J]. Ben-Gurion University of the Negev,2005,44(4):532-545.
APA Pearlmutter, D,Berliner, P,&Shaviv, E.(2005).Evaluation of urban surface energy fluxes using an open-air scale model.JOURNAL OF APPLIED METEOROLOGY,44(4),532-545.
MLA Pearlmutter, D,et al."Evaluation of urban surface energy fluxes using an open-air scale model".JOURNAL OF APPLIED METEOROLOGY 44.4(2005):532-545.
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