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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Albergel, C. Rudiger, C. Calvet, J.-C. Carrer, D. Pellarin, T. |
| Copyright Year | 2009 |
| Description | Author affiliation: Department of Civil and Environmental Engineering, The University of Melbourne, Australia (Rudiger, C.) || LTHE (UMR 5564), Grenoble, France (Pellarin, T.) || CNRM/GAME (Météo-France, CNRS), Toulouse, France. METEO-FRANCE/CNRM 42, Av. Conolis 31057 TOULOUSE CEDEX 1 (Albergel, C.; Calvet, J.-C.; Carrer, D.) |
| Abstract | A long term profile soil moisture data acquisition effort is currently under way at 12 monitoring stations across southwestern France. The spatial distribution and set-up of those sites was specifically designed for validating remote sensing and model soil moisture estimates [1], [2]. Those m-situ measurements are used to test a simple method to retrieve root zone soil moisture from a time series of surface soil moisture information. A recursive exponential filter using a time constant, T, is used to compute a profile soil water index from the surface observations. Through optimisation, a unique value for T of 6 days is found to result in a satisfactory correlation between observation and estimate for all stations. The surface soil moisture observed is also used to evaluate the normalized surface soil moisture estimates derived from coarse resolution (25 km) active microwave data of the ASCAT C-band. For 11 stations, significant correlation levels are found. The best correlation between a soil water index derived from ASCAT and the in-situ observations is obtained for a T of 14 days. |
| File Size | 666986 |
| File Format | |
| ISBN | 9781424433940 |
| DOI | 10.1109/IGARSS.2009.5418297 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-07-12 |
| Publisher Place | South Africa |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Soil moisture Microwave measurements Moisture measurement Soil measurements Remote sensing Remote monitoring Surface soil Data acquisition Time measurement Testing ASCAT exponential filter remote sensing |
| Content Type | Text |
| Resource Type | Article |
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