Review of methods for in situ leaf area index (LAI) determination: Part II. Estimation of LAI,errors and sampling |
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| Affiliation: | 1. Sapienza University of Rome, Department of Architecture and Design, Piazza Borghese 9, Rome, Italy;2. CAVElab – Computational and Applied Vegetation Ecology, Ghent University, Ghent, Belgium;3. Earth Observation, Climate and Optical Group, National Physical Laboratory, Hampton Road, Teddington, Middlesex, TW11 0LW, United Kingdom;4. Department of Geography, University College London, Gower Street, WC1E 6BT, United Kingdom;5. CREA, Research Centre for Forestry and Wood, viale Santa Margherita 80, Arezzo, Italy |
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| Abstract: | The theoretical background of modeling the gap fraction and the leaf inclination distribution is presented and the different techniques used to derive leaf area index (LAI) and leaf inclination angle from gap fraction measurements are reviewed. Their associated assumptions and limitations are discussed, i.e., the clumping effect and the distinction between green and non-green elements within the canopy. Based on LAI measurements in various canopies (various crops and forests), sampling strategy is also discussed. |
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