A surface heat island study of Athens using high-resolution satellite imagery and measurements of the optical and thermal properties of commonly used building and paving materials
- 1 September 2009
- journal article
- research article
- Published by Taylor & Francis Ltd in International Journal of Sustainable Energy
- Vol. 28 (1-3), 59-76
- https://doi.org/10.1080/14786450802452753
Abstract
High-spatial resolution multispectral satellite images collected over the metropolitan Athens area in Greece were used to generate (a) a shortwave albedo map depicting the albedo spatial variations across the metropolitan area, (b) a fractional vegetation cover map showing the spatial distribution of urban vegetation and (c) a daytime and night-time land surface temperature (LST) map depicting the spatial variations of the surface temperature across the city. From LST maps, cooling and heating regions were identified and analysed to reveal relationships between surface heat islands and urban surface characteristics. Based on the data acquired with the use of satellite images and in order to better define the heat island problem and the mitigation measures that need to be taken, the most common building and paving materials used in the urban fabric of Athens were examined. Their optical properties were measured using a UV/VIS/NIR spectrophotometer fitted with an integrating sphere, an emissometer and their thermal performance was evaluated. Furthermore, measurements of the spectral reflectance help explore the possibility of increasing the near-infrared reflectance of materials in order to increase their total solar reflectance. The solar reflectance index of the samples was calculated in order to characterise them as ‘cool’ or ‘warm’. Cool materials, with high albedo and thermal emittance values, attain lower surface temperatures when exposed to solar radiation, reducing the transference of heat to the environmental air.This publication has 28 references indexed in Scilit:
- Use of Satellite Remote Sensing in Support of Urban Heat Island StudiesAdvances in Building Energy Research, 2007
- Solar spectral optical properties of pigments—Part II: survey of common colorantsSolar Energy Materials and Solar Cells, 2005
- A generalized single‐channel method for retrieving land surface temperature from remote sensing dataJournal of Geophysical Research: Atmospheres, 2003
- Revised landsat-5 tm radiometric calibration procedures and postcalibration dynamic rangesIEEE Transactions on Geoscience and Remote Sensing, 2003
- Thermal remote sensing of urban climatesRemote Sensing of Environment, 2003
- Modifications in energy demand in urban areas as a result of climate changes: an assessment for the southeast Mediterranean regionEnergy Conversion and Management, 2001
- Narrowband to broadband conversions of land surface albedo I: AlgorithmsRemote Sensing of Environment, 2001
- Principles and formulations for organic coatings with tailored infrared propertiesProgress in Organic Coatings, 1992
- Satellite-derived urban heat islands from three coastal cities and the utilization of such data in urban climatologyInternational Journal of Remote Sensing, 1989
- An improved dark-object subtraction technique for atmospheric scattering correction of multispectral dataRemote Sensing of Environment, 1988