Estimation of energy fluxes from thermal infrared, spectral reflectances, microwave data and SVAT modeling
| Autor: | P. Bessemoulin, Patrick Bertuzzi, K. Bergaoui, Habiba Chauki, Albert Olioso, Jean-Pierre Wigneron, Andre Chanzy, J.-C. Clavet |
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| Přispěvatelé: | Unité de bioclimatologie, Institut National de la Recherche Agronomique (INRA), Unité de Science du Sol |
| Rok vydání: | 1999 |
| Předmět: |
Canopy
010504 meteorology & atmospheric sciences [SDV]Life Sciences [q-bio] 0207 environmental engineering Energy balance 02 engineering and technology Vegetation 15. Life on land 01 natural sciences Physics::Geophysics Atmosphere [SDE]Environmental Sciences Radiative transfer Astrophysics::Solar and Stellar Astrophysics General Earth and Planetary Sciences Environmental science Leaf area index 020701 environmental engineering Water content ComputingMilieux_MISCELLANEOUS Microwave 0105 earth and related environmental sciences Remote sensing |
| Zdroj: | Physics and Chemistry of the Earth Physics and Chemistry of the Earth, Elsevier, 1999, 24 (7), pp.829-836 |
| ISSN: | 1464-1909 1474-7065 |
| Popis: | The ALiBi model, a Soil-Vegetation-Atmosphere Transfer model, was developed to simulate mass and energy exchanges between vegetation canopies, the soil and the atmosphere. In the present work, it was used in conjunction with remote sensing data in thermal, solar and microwave domains to assess energy balance of various vegetation canopies (two soybean crops, one wheat crop and one fallow canopy). Inversions of radiative transfer formulations were performed to retrieve model parameters: -i) canopy structure parameters (leaf area index and canopy height) from red and near-infrared reflectances, when available; -ii) surface soil moisture from microwave measurements, when available and -iii) plant water transfer parameters from thermal infrared measurements. The estimates of energy balance fluxes were in good agreement with measured values, in particular for well-developed canopies. It can be noticed that it was not necessary to know accurately surface soil moisture and leaf area index to assess energy balance fluxes. Conversely, the vegetation height must be known with a good accuracy. |
| Databáze: | OpenAIRE |
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