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Prospect redux
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Andreoli, G. Schmuck, G. Jacquemoud, S. Hosgood, B. Ustin, S. L. Verdebout, J. |
| Copyright Year | 1995 |
| Description | The remote estimation of leaf biochemical content from spaceborne platforms has been the subject of many studies aimed at better understanding of terrestrial ecosystem functioning. The major ecological processes involved in exchange of matter and energy, like photosynthesis, primary production, evaportranspiration, respiration, and decomposition can be related to plant properties e.g., chlorophyll, water, protein, cellulose and lignin contents. As leaves represent the most important plant surfaces interacting with solar energy, a top priority has been to relate optical properties to biochemical constituents. Two different approaches have been considered: first, statistical correlations between the leaf reflectance (or transmittance) and biochemical content, and second, physically based models of leaf scattering and absorption developed using the laws of optics. Recently reviewed by Verdebout et al., the development of models of leaf optical properties has resulted in better understanding of the interaction of light with plant leaves. Present radiative transfer models mainly use chlorophyll and/or water contents as input parameters to calculate leaf reflectance. Inversion of these models allows to retrieve these constituents from spectrophotometric measurements. Conel et al. recently proposed a two-stream Kubelka-Munk model to analyze the influence of protein, cellulose, lignin, and starch on leaf reflectance, but in fact, the estimation of leaf biochemistry from remote sensing is still an open question. In order to clarify it, a laboratory experiment associating visible/infrared spectra of plan leaves both with physical measurements and biochemical analyses was conducted at the Joint Research Center during the summer of 1993. This unique data set has been used to upgrade the PROSPECT model, by including leaf biochemistry. |
| File Size | 284448 |
| Page Count | 6 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19950027337 |
| Archival Resource Key | ark:/13960/t1pg6m80d |
| Language | English |
| Publisher Date | 1995-01-23 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing Lignin Dimensional Measurement Ecosystems Cellulose Summer Decomposition Biochemistry Matter Physics Transmittance Remote Sensing Chlorophylls Spectral Reflectance Proteins Moisture Content Optical Properties Solar Energy Statistical Correlation Space Platforms Radiative Transfer Spectrophotometry Respiration Photosynthesis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
