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| Κλασματική Εμβαδόν Ανοίγματος Κόμης× | Δείκτης Καιρού Πυρκαγιάς× | |
|---|---|---|
| Πεδίο | Δασολογία | Δασολογία |
| Οικογένεια | Process / pipeline | Process / pipeline |
| Έτος προέλευσης≠ | 1979 | 1987 |
| Δημιουργός≠ | John Norman | Cornelius Van Wagner |
| Τύπος≠ | measurement pipeline | weather-based fire danger system |
| Θεμελιώδης πηγή≠ | Machado, J.-L., & Reich, P. B. (1999). Evaluation of several measures of canopy openness. Canadian Journal of Forest Research, 29(9), 1439–1444. link ↗ | Van Wagner, C. E. (1987). Development and structure of the Canadian Forest Fire Weather Index System. Canadian Forestry Service Publication 1333. link ↗ |
| Εναλλακτικές ονομασίες | gap fraction, canopy openness | FWI, Canadian Fire Weather Index |
| Συναφείς | 2 | 2 |
| Σύνοψη≠ | 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. | The Fire Weather Index (FWI) System, developed by the Canadian Forest Service, is a comprehensive weather-based fire danger rating system consisting of six component indices and an overall Fire Weather Index. It uses daily weather observations (temperature, relative humidity, wind speed, and precipitation) to estimate fine-fuel moisture, fire behavior, and risk. The FWI System is used operationally across Canada, many U.S. states, and internationally for fire management decisions and fire danger forecasting. |
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