Sammenlign metoder
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| Brændselsskade (dNBR)× | Canopy Gap Fraction× | |
|---|---|---|
| Fagområde | Skovbrug | Skovbrug |
| Familie | Process / pipeline | Process / pipeline |
| Oprindelsesår≠ | 2006 | 1979 |
| Ophavsperson≠ | Carl Key | John Norman |
| Type≠ | remote sensing index | measurement pipeline |
| Oprindelig kilde≠ | Key, C. H., & Benson, N. C. (2006). Landscape Assessment (LA): Sampling and Analysis Methods. General Technical Report RMRS-GTR-164-CD, USDA Forest Service Rocky Mountain Research Station. link ↗ | Machado, J.-L., & Reich, P. B. (1999). Evaluation of several measures of canopy openness. Canadian Journal of Forest Research, 29(9), 1439–1444. link ↗ |
| Aliasser≠ | dNBR, Delta NBR, burn severity index | gap fraction, canopy openness |
| Relaterede≠ | 3 | 2 |
| Resumé≠ | Burn severity is a quantitative measure of fire-induced changes in vegetation and soil, assessed using satellite-based spectral indices. The Normalized Burn Ratio (NBR) and its delta (dNBR) compare pre-fire and post-fire spectral reflectance in the near-infrared and shortwave-infrared bands to detect fire-caused vegetation damage and soil exposure. Developed by Key and Benson in 2006, dNBR has become the standard remote-sensing tool for rapid post-fire assessment and is used for emergency response, recovery planning, and ecological analysis. | Canopy gap fraction quantifies the proportion of sky visible through the forest canopy, expressed as a percentage. Developed to measure light availability in the understory, it is a standard metric in forest ecology for characterizing canopy structure and microhabitat conditions. This measure is essential for understanding light-limited photosynthesis and seedling establishment in closed-canopy forests. |
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