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W. Wagner, R. De Jeu, P. van Oevelen:
"Towards multi-source global soil moisture datasets for unraveling climate change impacts on water resources";
Talk: 33rd International Symposium on Remote Sensing of Environment (ISRSE), Stresa, Italy; 2009-05-04 - 2009-05-08; in: "33rd International Symposium on Remote Sensing of Environment", (2009), 3 pages.

Thanks to recent advances in microwave remote
sensing of soil moisture there is now, for the first time, the
chance to create long-term multi-source global soil moisture
data sets useful for quantifying changes in the land surface
water budget. In this paper the possibility of merging soil
moisture data derived from active and passive microwave
observations is suggested. Scientific challenges will be the
quantification of the temporally and spatially error fields for
each satellite product, to develop data assimilation systems
using appropriate land surface parameterisation schemes, and
to understand the complex effects of the various error sources
(sensor calibration, retrieval errors, model parameterisation,
etc.) on observed variabilities. This paper is intended to be a
contribution to the International Soil Moisture Working
Group of GEWEX and GEO Sub-Task WA-08-01.