DocumentCode :
3067283
Title :
On the synergy of SMOS and Terra/Aqua MODIS: High resolution soil moisture maps in near real-time
Author :
Piles, Maria ; Vall-llossera, Merce ; Camps, A. ; Sanchez, Nuria ; Martinez-Fernandez, Jose ; Martinez, Jose Luis ; Gonzalez-Gambau, V. ; Riera, R.
Author_Institution :
IEEC, Univ. Politec. de Catalunya, Barcelona, Spain
fYear :
2013
fDate :
21-26 July 2013
Firstpage :
3423
Lastpage :
3426
Abstract :
An innovative downscaling approach to obtain fine-scale soil moisture estimates from 40 km SMOS observations has been developed. It optimally blends SMOS multi-angular and full-polarimetric information with MODIS visible/data into high resolution soil moisture maps. The core of the algorithm is a model that linksmicrowave/optical sensitivity to soilmoisture and linearly relates the two instruments across spatial scales. This algorithm has been implemented at SMOS-BEC facilities and near real-time maps of disaggregated soil moisture over the Iberian Peninsula are being distributed. In this work, the temporal and spatial variability of these maps is evaluated through comparison with ground-basedmesurements acquired at the REMEDHUS soil moisture network, in the central part of the Duero basin, Spain. Results from a two-year time-series comparison show that downscaled soil moisture maps compare well with in situ data and nicely reproduce soil moisture dynamics at a 1 km spatial scale.
Keywords :
hydrological techniques; moisture; remote sensing; soil; Duero basin; Iberian Peninsula; MODIS visible-data; REMEDHUS soil moisture network; SMOS full-polarimetric information; SMOS multiangular information; SMOS observations; SMOS-BEC facilities; Spain; TERRA-AQUA MODIS; fine-scale soil moisture; ground-based mesurements; innovative downscaling approach; microwave-optical sensitivity; soil moisture dynamics; soil moisture maps; Correlation; MODIS; Optical sensors; Soil measurements; Soil moisture; Spatial resolution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2013 IEEE International
Conference_Location :
Melbourne, VIC
ISSN :
2153-6996
Print_ISBN :
978-1-4799-1114-1
Type :
conf
DOI :
10.1109/IGARSS.2013.6723564
Filename :
6723564
Link To Document :
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