Skip to Main content Skip to Navigation
Theses

Assimilation de données de télédétection pour le suivi des surfaces continentales : Mise en oeuvre sur un site expérimental

Abstract : The research undertaken in this thesis focuses on the assimilation of remotely sensed data for continental surface monitoring. The analysed variables are root-zone soil moisture content and above-ground vegetation biomass. The data cover the period 2001 to 2004 and were collected over fallow at the SMOSREX experimental site, south-west of Toulouse, France. Four assimilation techniques (EKF, EnKF, 1D-VAR and T-VAR) were implemented into the Météo-France SVAT model ISBA-A-gs and their performances compared to each other. It was found that the 1D-VAR is the most effective technique, for both quality of the analyses and lower computational cost. This particular technique was applied in a joint assimilation of surface soil moisture and leaf are index observations, as well as of remotely sensed measurements collected over the site. The assimilation improves the control simulation, if a dynamic wilting point is introduced (this is particularly useful during strong drought periods). The impact of a high level of uncertainty in the precipitation data is also evaluated.
Document type :
Theses
Complete list of metadata

Cited literature [118 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00157976
Contributor : Williams Exbrayat <>
Submitted on : Wednesday, June 27, 2007 - 3:09:30 PM
Last modification on : Monday, April 5, 2021 - 2:26:11 PM
Long-term archiving on: : Monday, September 24, 2012 - 10:40:09 AM

Identifiers

  • HAL Id : tel-00157976, version 1

Collections

Citation

Joaquín Muñoz Sabater. Assimilation de données de télédétection pour le suivi des surfaces continentales : Mise en oeuvre sur un site expérimental. Autre. Université Paul Sabatier - Toulouse III, 2007. Français. ⟨tel-00157976⟩

Share

Metrics

Record views

400

Files downloads

482