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Marco L. Carrera, Stéphane Bélair, and Bernard Bilodeau

snow depth observations are also used in CaLDAS for the analysis of snow depth. For the specification of soil moisture, there are a number of remote sensing missions dedicated to collecting near-real-time data that have been discussed in the introduction. ISBA has been coupled to a surface microwave radiative transfer model for the assimilation of passive L-band TBs within CaLDAS. This study will present the results from data assimilation experiments in which synthetically derived L-band TBs are

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Sujay V. Kumar, Kenneth W. Harrison, Christa D. Peters-Lidard, Joseph A. Santanello Jr., and Dalia Kirschbaum

algorithms that are focused on generating improved estimates of hydrologic model states ( Kumar et al. 2008 ). More recently, the LIS-DA subsystem was enhanced through the incorporation of a suite of radiative transfer models (LIS-RTM) that enables the direct use of raw satellite observations for data assimilation. The optimization (LIS-OPT; Kumar et al. 2012 ) and uncertainty estimation (LIS-UE; Harrison et al. 2012 ) subsystems help in improving the representation of model parameters and for

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