title: Energy flux parametrization as an opportunity to get Urban Heat Island insights: The case of Athens, Greece (Thermopolis 2009 Campaign).
abstract: Energy flux parameterization was effected for the city of Athens, Greece, by utilizing two approaches, the Local-Scale Urban Meteorological Parameterization Scheme (LUMPS) and the Bulk Approach (BA). In situ acquired data are used to validate the algorithms of these schemes and derive coefficients applicable to the study area. Model results from these corrected algorithms are compared with literature results for coefficients applicable to other cities and their varying construction materials. Asphalt and concrete surfaces, canyons and anthropogenic heat releases were found to be the key characteristics of the city center that sustain the elevated surface and air temperatures, under hot, sunny and dry weather, during the Mediterranean summer. A relationship between storage heat flux plus anthropogenic energy flux and temperatures (surface and lower atmosphere) is presented, that results in understanding of the interplay between temperatures, anthropogenic energy releases and the city characteristics under the Urban Heat Island conditions.
authors.affiliation: Laboratory of Atmospheric Pollution and of Control Engineering of Atmospheric Pollutants, Faculty of Engineering, Department of Environmental Engineering, Democritus University of Thrace, 67100 Xanthi, Greece.
authors.forename: G
authors.initials: G
authors.lastname: Loupa
authors.affiliation: Laboratory of Atmospheric Pollution and of Control Engineering of Atmospheric Pollutants, Faculty of Engineering, Department of Environmental Engineering, Democritus University of Thrace, 67100 Xanthi, Greece. Electronic address: rapso@env.duth.gr.
authors.forename: S
authors.initials: S
authors.lastname: Rapsomanikis
authors.affiliation: Laboratory of Atmospheric Pollution and of Control Engineering of Atmospheric Pollutants, Faculty of Engineering, Department of Environmental Engineering, Democritus University of Thrace, 67100 Xanthi, Greece.
authors.forename: A
authors.initials: A
authors.lastname: Trepekli
authors.affiliation: Laboratory of Atmospheric Pollution and of Control Engineering of Atmospheric Pollutants, Faculty of Engineering, Department of Environmental Engineering, Democritus University of Thrace, 67100 Xanthi, Greece.
authors.forename: K
authors.initials: K
authors.lastname: Kourtidis
keywords: Aerodynamic resistance for heat; Anthropogenic releases; Heat waves; Objective hysteresis model; Storage heat flux density; kB(−1)