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Climate 2018, 6(1), 16; https://doi.org/10.3390/cli6010016

Recognition of Thermal Hot and Cold Spots in Urban Areas in Support of Mitigation Plans to Counteract Overheating: Application for Athens

1
Department of Physics, National and Kapodistrian University of Athens, 15772 Athens, Greece
2
Faculty of Built Environment, University of New South Wales, Sydney 2052, Australia
*
Author to whom correspondence should be addressed.
Received: 30 January 2018 / Revised: 5 March 2018 / Accepted: 5 March 2018 / Published: 9 March 2018
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Abstract

Mitigation plans to counteract overheating in urban areas need to be based on a thorough knowledge of the state of the thermal environment, most importantly on the presence of areas which consistently demonstrate higher or lower urban land surface temperatures (hereinafter referred to as “hot spots” or “cold spots”, respectively). The main objective of this research study is to develop a methodological approach for the recognition of thermal “hot spots” and “cold spots” in urban areas during summer; this is accomplished with (a) the combined use of high and medium spatial resolution satellite data (Landsat 8 and Terra-MODIS, respectively); (b) the downscaling of the Terra-MODIS satellite data so as to acquire spatial resolution similar to the Landsat one and at the same time take advantage of the high revisit time as compared to the respective one of Landsat (16 days); and (c) the application of a statistical clustering technique to recognize “hot spots” and “cold spots”. The methodological approach was applied as a case study for the urban area of Athens, Greece for a summer period. Results demonstrated the capacity of the methodological approach to recognize “hot spots” and “cold spots”, revealed a strong relationship between land use and “hot spots” and “cold spots”, and showed that the average land surface temperature (LST) difference between the “hot spots” and “cold spots” can reach 9.1 °K. View Full-Text
Keywords: land surface temperature; “hot spots”; “cold spots”; MODIS downscaling land surface temperature; “hot spots”; “cold spots”; MODIS downscaling
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Mavrakou, T.; Polydoros, A.; Cartalis, C.; Santamouris, M. Recognition of Thermal Hot and Cold Spots in Urban Areas in Support of Mitigation Plans to Counteract Overheating: Application for Athens. Climate 2018, 6, 16.

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