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Title

Influence of different factors on relative air humidity in Zaragoza, Spain

AuthorsCuadrat, José María; Vicente Serrano, Sergio M. ; Saz Sánchez, Miguel Ángel
Keywordsurban climate
relative humidity
urban dry island
spatial patterns
surface wind direction
Spain
Zaragoza
Issue Date19-Mar-2015
CitationFrontiers in Earth Science 3: 10 (2015)
AbstractIn this study, the spatial patterns of relative air humidity and its relation to urban, geographical and meteorological factors in the city of Zaragoza (Spain) is discussed. We created a relative humidity database by means of 32 urban transects. Data were taken on different days and with different weather types. This data set was used to map the mean spatial distribution of urban dry island (UDI). Using stepwise multiple regression analysis and Landsat ETM+ images the relationships between mean UDI and the main geographic-urban factors: topography, land cover, and surface reflectivity, have been analyzed. Different spatial patterns of UDI were determined using Principal Component Analysis (PCA) (Varimax rotation). The three components extracted accounted for 91% of the total variance. PC1 accounted for the most general patterns (similar to mean UDI); PC2 showed a shift of dry areas to the SE and PC3 a shift to NW. Using data on wind direction in Zaragoza, we have found that the displacement of dry areas to the SE (PC 2) was greater during NW winds while the shift to the NW (PC 3) was produced mainly by SE winds.
Publisher version (URL)http://dx.doi.org/10.3389/feart.2015.00010
URIhttp://hdl.handle.net/10261/128570
DOI10.3389/feart.2015.00010
ISSN2296-6463
Appears in Collections:(IPE) Artículos
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