Evolution (4) spectacle (3) surveillance (3) Monitoring (3) Variation (3) Altitudes (3) Temperature (3) Mountains (3) Permafrost (3) Evolucionismo (3) Montagnes (3) Évolution (3) végétation (2) saison (2) physiologie (2) écosystème (2) index (2) Physiology (2) Indexes (2) Photographs (2) Technique (2) Water (2) Values (2) Uncertainty (2) Slopes (Physical geography) (2) Repeat photography (2) Reflectance (2) Plants (2) Plant phenology (2) Physiology (2)