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Author Roberts, Sarah M. ♦ Oke, T. R. ♦ Grimmond, C. S. B. ♦ Voogt, J. A.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Four Method ♦ Estimate Urban Heat Storage ♦ Diurnal Behavior ♦ Local Scale ♦ Independent Method ♦ 8-day Summertime Observational Study ♦ Urban System ♦ Similar Diurnal Course ♦ Net Heat Storage Flux ♦ Parameterization Scheme Objective Hysteresis Model ♦ Tall Building ♦ Ideal Environment ♦ Relative Performance ♦ High Density ♦ Sensible Heat Exchange ♦ Seb Term ♦ Teb Method ♦ Thick Wall ♦ Morphometric Property ♦ City Center ♦ Complex Array ♦ Direct Measurement ♦ Termed Re ♦ Urban Site ♦ Understudied Component ♦ Heat Flux ♦ Urban Surface Energy Balance ♦ Dry Climate ♦ Observed Meteorological Data ♦ Overestimate Storage ♦ Horizontal Length ♦ Large Thermal Mass ♦ Heat Storage
Abstract The relative performance of four independent methods to estimate the magnitude and diurnal behavior of net heat storage fluxes (QS) in a city center is assessed. This heat flux is a significant but understudied component of the urban surface energy balance (SEB). Direct measurement of this SEB term at the local scale (horizontal length scale102–104 m) is practically unattainable primarily because of the complex array of materials and the three-dimensionality of urban systems. Results of an 8-day summertime observational study at a site in the center of Marseille, France, are presented. This locale is an ideal environment for such research because of the warm, dry climate (hence the SEB is dominated by sensible heat exchanges) and the high density of tall buildings with thick walls (hence it has a large thermal mass that favors heat storage as a component of the SEB). Estimates of QS derived as residuals in the SEB, after the remaining terms are measured directly, (termed RES) are compared with those calculated from a parameterization scheme [objective hysteresis model (OHM)], a local-scale numerical model [Town Energy Balance model (TEB)], and a bulk heat transfer method [thermal mass scheme (TMS)]. Inputs to the methods include observed meteorological data and morphometric properties of the urban site. All approaches yield a similar diurnal course. The OHM and TEB methods tend to slightly overestimate storage uptake by day when compared
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Publisher Date 2005-01-01