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CR 30:61-69 (2005)  -  doi:10.3354/cr030061

Spatial patterns of the urban heat island in Zaragoza (Spain)

Sergio M. Vicente-Serrano1,2,*, José M. Cuadrat-Prats1, Miguel A. Saz-Sánchez1

1Instituto Pirenaico de Ecología, CSIC (Spanish Research Council), Campus de Aula Dei, PO Box 202, 50080 Zaragoza, Spain
2Unit for Landscape Modelling, University of Cambridge, Sir William Harding Building, Tennis Court Road,Cambridge CB2 1QB, UK
3Departamento de Geografía, Universidad de Zaragoza, Calle Pedro Cerbuna, Ciudad Universitaria, 50009 Zaragoza, Spain

ABSTRACT: Spatial patterns of the urban heat island (UHI) in Zaragoza (Spain) were determined by Principal Component Analysis (VARIMAX rotation) of air temperature in the city, and mapped using GIS. The 3 components extracted accounted for 92.9% of the total variance. Principal component (PC) 1 accounted for the most general patterns of UHI, PC2 showed a shift of warm areas to the SE and PC3 a shift to the NW. A rotated component matrix was used to identify correlations between each component and daily maps. The spatial patterns indicated by PC2 and PC3 were determined by surface wind direction. The displacement of warm areas to the SE (PC2) was greater during NW winds while the shift to the NW (PC3) was produced mainly by SE winds.

KEY WORDS: Urban climate · Urban heat island · Spatial patterns · Principal component analysis · Surface wind · Zaragoza · Spain

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