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

Frontiers in Digital Humanities

Cuadrat, José¹  M.²  Vicente-Serrano, Sergio³  Saz, Miguel A.⁴ 

[1] Department of Geography, University of Zaragoza, Zaragoza, Spain;Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas, Zaragoza, Spain

关键词: urban climatology;    relative humidity;    Urban Dry Island;    spatial patterns;    Surface wind;    Zaragoza;    Spain;   

DOI  :  10.3389/feart.2015.00010

学科分类：社会科学、人文和艺术（综合）

来源: Frontiers

【 摘 要 】

In 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 (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.

【 授权许可】

CC BY