Barrett Presentation

A Comparative Analysis of Soil Moisture Retrieval using C- and L-band Interferometric Synthetic Aperture Radar (INSAR) over Southeast Ireland.

Brian Barrett 1, Ned Dwyer 2 and Pádraig Whelan 1

1 Department of Zoology, Ecology & Plant Science (ZEPS), University College Cork;;  

Coastal & Marine Resources Centre

The importance of land surface-atmosphere interactions, principally the effects of soil moisture, on hydrological, meteorological, and ecological processes has gained widespread recognition over recent decades. Its high spatial and temporal variability however, makes soil moisture a difficult parameter to measure and monitor effectively using traditional methods. In this study, the use of Advanced Land Observing Satellite (ALOS) Phased Array L-band Synthetic Aperture Radar (PALSAR) Interferometric coherence to detect and quantify surface soil moisture changes is investigated. Results are compared with ENVISAT Advanced Synthetic Aperture Radar (ASAR) coherence images covering the same time period. The soil moisture estimation is applied to bare and sparsely vegetated fields with assumed constant surface roughness, identified from their interferometric correlations. The relationship between the backscattering coefficient and in-situ measured soil moisture is subsequently used to produce soil moisture maps for fields without in situ data available.

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