Nouvellon Yann, Moran M. Susan, Chehbouni A., Lo Seen Danny, Bryant Ross, Nichols M., Prévot L., Rambal Serge, Ni Wanmei, Bégué Agnès, Heilman Phil, Keefer T.O..
2000. Assimilating LANDSAT data in an ecosystem model for multi-year simulation of grassland carbon, water and energy budget.
In : Taking the pulse of the planet, the role of remote sensing in managing the environment. Vol. 5 : IGARSS 2000 International Geoscience and Remote Sensing Symposium , Honolulu, Hawaï, 24-28 July 2000. IEEE
Autre titre : L'assimilation de données LANDSAT dans un modèle écosystémique pour la simulation multi-annuelle du budget carboné, hydrique et énergétique d'une prairie
Résumé : In this study, a spatially explicit hydro-ecological model (SEHEM) has been developed and validated over a semi-arid grassland sub-watershed in Arizona. The model combines a plant growth sub-model to simulate the seasonal dynamics of root and aboveground biomass, and a hydrological sub-model to simulate soil moisture and temperature dynamics, energy and water budgets for the soil and the vegetation. In addition, the model has been coupled to radiative transfer models (RTMs) in the visible, near infrared and thermal infrared (TIR) bands so that canopy reflectance and directional radiative surface temperature are simulated. Landsat Thematic Mapper (TM) images obtained during a six year period were used to adjust some spatially variable model parameters by minimizing the différence between model simulations and remotely sensed data. Comparisons between observations and model estimates of above ground biomass, net radiation, sensible and latent heat flux, component temperatures are presented.
Mots-clés Agrovoc : prairie, besoin nutritionnel, besoin en eau, modèle de simulation, télédétection, consommation d'énergie, zone semi-aride, biomasse, taux de croissance, bilan hydrique, bilan hydrique du sol, bilan radiatif
Mots-clés géographiques Agrovoc : Arizona
Classification Agris : U30 - Méthodes de recherche
U10 - Informatique, mathématiques et statistiques
F62 - Physiologie végétale - Croissance et développement
Auteurs et affiliations
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Nouvellon Yann, CIRAD-FORET-PLANTATIONS (COG)
ORCID: 0000-0003-1920-3847
- Moran M. Susan, USDA (USA)
- Chehbouni A., CESBIO (FRA)
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Lo Seen Danny, CIRAD-AMIS-AGRONOMIE (FRA) ORCID: 0000-0002-7773-2109
- Bryant Ross, USDA (USA)
- Nichols M., USDA (USA)
- Prévot L., INRA (FRA)
- Rambal Serge, CNRS (FRA)
- Ni Wanmei, USDA (USA)
- Bégué Agnès, CIRAD-AMIS-AGRONOMIE (FRA)
- Heilman Phil, USDA (USA)
- Keefer T.O., USDA (USA)
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/477761/)
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