Monthly precipitation mapping of the Iberian Peninsula using spatial interpolation tools implemented in a Geographic Information System
Ninyerola i Casals, Miquel (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Pons, Xavier (Universitat Autònoma de Barcelona. Departament de Geografia)
Roure i Nolla, Joan Maria (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)

Date:	2007
Abstract:	In this study, spatial interpolation techniques have been applied to develop an objective climatic cartography of precipitation in the Iberian Peninsula (583,551 km2). The resulting maps have a 200m spatial resolution and a monthly temporal resolution. Multiple regression, combined with a residual correction method, has been used to interpolate the observed data collected from the meteorological stations. This method is attractive as it takes into account geographic information (independent variables) to interpolate the climatic data (dependent variable). Several models have been developed using different independent variables, applying several interpolation techniques and grouping the observed data into different subsets (drainage basin models) or into a single set (global model). Each map is provided with its associated accuracy, which is obtained through a simple regression between independent observed data and predicted values. This validation has shown that the most accurate results are obtained when using the global model with multiple regression mixed with the splines interpolation of the residuals. In this optimum case, the average R2 (mean of all the months) is 0. 85. The entire process has been implemented in a GIS (Geographic Information System) which has greatly facilitated the filtering, querying, mapping and distributing of the final cartography.
Note:	Premi a l'excel·lència investigadora. Àmbit de les Ciències Socials. 2008
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	PREI2008
Published in:	Theoretical and Applied Climatology, Vol. 89, Núm. (2007) , p. 195-209, ISSN 1434-4483

DOI: 10.1007/s00704-006-0264-2

Post-print 36 p, 130.3 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Grupo de Investigación Métodos y Aplicaciones en Teledetección y Sistemas de Información Geográfica (GRUMETS)
Articles > Research articles
Articles > Published articles