The capability of L band wavelengths to register the soil emission over sparse to moderately dense forests makes attractive the comparative study of the soil moisture content and vegetation biophysical parameter. Soil and vegetation conditions contribute to the microwave measurements through complex interactions, basically resulting from vegetation structure and from moisture content and roughn...

In order to provide a relatively simple means of predicting live herbaceous plant moisture content from a readily available meteorological index with an accuracy adequate for fire hazard assessment, the moisture content fluctuations of certain species were correlated with the values of a seasonal drought index based on soil moisture deficiency. The simple linear regression models provided the b...

Past research has demonstrated the potential of mapping soil moisture using both low frequency passive and active microwave measurements (e.g. Jackson et al., 1999; Wagner & Scipal, 2000). This resulted in formulating satellite missions carrying L-band microwave sensors capable of monitoring soil moisture globally. For example, a microwave radiometer has recently been launched by European Space...

The scope of this study is to establish the parameters of the L-band (1.4 GHz) Microwave Emission of the Biosphere model (L-MEB) for grass covers, and to assess surface soil moisture retrievals in areas covered by grass. L-MEB parameters are key ancillary information for the Soil Moisture and Ocean Salinity mission (SMOS) retrieval algorithm that produces estimates of the surface soil moisture ...

—Previous studies have shown the possibility of using European Remote Sensing/synthetic aperture radar (ERS/SAR) data to monitor surface soil moisture from space. The linear relationships between soil moisture and the SAR signal have been derived empirically and, thus, were a priori specific to the considered watershed. In order to overcome this limit, this study focused on two objectives. The ...

r a 200 .022 : +1 210 [email protected] Summary Surface representation of the root-zone soil moisture is investigated so that feasibility of using optical remote sensing techniques to indirectly map root-zone soil moisture is assessed. Specifically, covariation of root-zone soil moisture with the normalized difference of vegetation index (NDVI) from Moderate Resolution Imaging Spectroradiometer (MODIS) ...

Prior numerical modelling studies show that atmospheric dispersion is sensitive to surface heterogeneities, but past studies do not consider the impact of a realistic distribution of surface heterogeneities on mesoscale atmospheric dispersion. While these focussed on dispersion in the convective boundary layer, the present work also considers dispersion in the nocturnal boundary layer and above...

1. INTRODUCTION Deardorff (1978, D78 henceforth) showed that a two-layered force-restore scheme is superior to bulk scheme in describing the surface soil moisture content because it contains the mechanism by which a deeper soil layer can influence the thin surface layer. This gives the flexibility and advantages in superficial soil moisture prediction especially when there are precipitation and...

Ecohydrology is the science that studies the mutual interaction between the hydrological cycle and ecosystems. Such an interaction is especially intense in water-controlled ecosystems, where water may be a limiting factor, not only because of its scarcity, but also because of its intermittent and unpredictable appearance. Hydrologic dynamics is shown to be a crucial factor for ecological patter...

The performance of single-channel, two-channel, and cal variables that play an important part in agricultural six-channel microwave radiometers is evaluated for the scheduling and water resource management (Jackson, retrieval of soil moisture using parameterized numerical 1993). Recent studies have shown the effects of soil simulations. Commonly used frequencies of 1.4 GHz, 2.7 moisture on the ...