Spectral Characteristics of Natural and Laboratory-Induced Leaf Senescence in Four Common North American Tree Species

摘要: Two laboratory techniques (air drying and oven drying) were implemented to compare the spectral reflectance differences between laboratory-induced natural leaf senescence. The signatures of four common North American tree species recorded over 2011 summ erautumn season. Natural ‘on-tree’ senescence was measured throughout period simultaneously with two methods. substantial observed techniques: persistence ‘green peak’ for methods; much higher values middle infrared region These results suggested that a more sophisticated method including ability export constituents during is required accurately reproduce autumn in setting. If achieved, this could greatly improve analyst’s changes associated vegetation health