Spatial patterns of SMOS downscaled soil moisture maps over the remedhus network (Spain)

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dc.contributor	Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions
dc.contributor	Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
dc.contributor.author	Sanchez, Nilda
dc.contributor.author	Piles Guillem, Maria
dc.contributor.author	Scaini, Anna
dc.contributor.author	Martinez Fernandez, Jose
dc.contributor.author	Camps Carmona, Adriano José
dc.contributor.author	Vall-Llossera Ferran, Mercedes Magdalena
dc.date	2012
dc.identifier.citation	Sanchez, N. [et al.]. Spatial patterns of SMOS downscaled soil moisture maps over the remedhus network (Spain). A: IEEE International Geoscience and Remote Sensing Symposium. "IGARSS 2012: International Geoscience and Remote Sensing Symposium: remote science for a dynamic earth: proceedings, 22-27 July 2012 Munich". Munich: Institute of Electrical and Electronics Engineers (IEEE), 2012, p. 714-717.
dc.identifier.citation	978-1-4673-1159-5
dc.identifier.citation	10.1109/IGARSS.2012.6351465
dc.identifier.uri	http://hdl.handle.net/2117/19615
dc.language.iso	eng
dc.publisher	Institute of Electrical and Electronics Engineers (IEEE)
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Oceanografia
dc.subject	Àrees temàtiques de la UPC::Enginyeria electrònica::Instrumentació i mesura::Sensors i actuadors
dc.subject	Soil moisture
dc.subject	Remote sensing
dc.subject	API
dc.subject	DEM
dc.subject	downscaling
dc.subject	SMOS
dc.subject	soil moisture
dc.subject	Teledetecció
dc.subject	Sòls -- Humitat
dc.title	Spatial patterns of SMOS downscaled soil moisture maps over the remedhus network (Spain)
dc.type	info:eu-repo/semantics/publishedVersion
dc.type	info:eu-repo/semantics/conferenceObject
dc.description.abstract	This paper describes the relationships found between remotely sensed soil moisture, in situ observed soil moisture, and spatial distribution of soil and climatic factors. For the comparison between remote and in situ soil moisture, soil moisture map series at high resolution, obtained by applying a downscaling approach that combines Soil Moisture and Ocean Salinity (SMOS) and MODIS imagery is extracted. The in situ soil moisture series are obtained from the Soil Moisture Measurement Stations Network (REMEDHUS) in Spain. For the spatial analysis, factors such as topography, precipitation, and land uses were mapped from the climatic and cartographic database of REMEDHUS. The comparison between downscaled and in situ soil moisture data resulted in correlation coefficient (R) values between 0.40 and 0.70, bias between -0.04 and 0.16 m3m-3, and root mean squared difference (RMSD) between 0.07 and 0.19 m3m-3. Regarding the spatial correlations between downscaled and spatial factors, no clear patterns were found when considering the topography (Topographic Wetness Index, TWI), and the land uses (Landsat classification). Nevertheless, the downscaled soil moisture was more related with the spatial distribution of precipitation (Antecedent Precipitation Index, API), with significant correlations varying between 0.24 and 0.55.
dc.description.abstract	Peer Reviewed

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