Surface Soil Moisture Retrieval in Southern Ireland using ENVISAT ASAR and ALOS PALSAR data.
Brian Barrett(1), Ned Dwyer(2) and Padraig Whelan(3)
(1) University College Cork (UCC), Butler Building, Distillery Fields, Cork, Ireland
(2) University College Cork (UCC), Naval Base, Ringaskiddy, Cork, Ireland
(3) University College Cork (UCC), Butler Building, Distillery Fields, Cork, Ireland
The importance of land surface–atmosphere interactions, principally soil moisture, on hydrological, meteorological, and ecological processes has gained widespread recognition over the past decades. Its high spatial and temporal variability though, makes it difficult to monitor effectively and thus introduces inaccuracy into the modelling of these processes where it is implicated. There is a need, therefore, for an efficient and comprehensive approach to reliably estimating spatially distributed near surface soil moisture, wherein spaceborne microwave remote sensing offers a prime solution.
The purpose of this research is to addresses the potential of ENVISAT ASAR and ALOS PALSAR Synthetic Aperture Radar (SAR) in extracting information on surface soil moisture content over different land covers in southern Ireland using different sensor configurations. The applied technique is based on deriving the relative changes in soil moisture between different SAR acquisitions using a multi-temporal analysis. Simultaneous with each data acquisition, ground measurements of soil and vegetation parameters are being taken within the study sites. Experiments and their analysis are still on-going; however some preliminary results are presented.