id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_b74gnkd46rcpthmt5zuowlykye	Hella Ellen Ahrends	Quantitative phenological observations of a mixed beech forest in northern Switzerland with digital photography	2008.0	11	.pdf	application/pdf	9137	809	63	Quantitative phenological observations of a mixed beech forest in northern Switzerland with digital photography We estimated the date of leaf emergence based on the levels of the extracted red, green and phenological observations of a mixed beech forest in northern Switzerland with digital photography, J. Vertical sky-ward wideangle photography has been successfully used for monitoring changing light conditions in forests, Leaf Area Index Digital camera images, phenology and digital image analysis in vegetation phenology is still a phenological observation using digital photography, incorporating an uncertainty analysis, for a managed mixed forest Extending the work of previous studies, we conducted an uncertainty analysis, a species-dependant phenological observation including a year-to-year comparison, and Signals derived from digital imagery (GF-based leaf unfolding) and validation data (visual leaf unfolding) for the dominant vegetation type in each ROI both years the GF values in beech-dominated ROIs increased slightly earlier than indicated by the validation data.	./cache/work_b74gnkd46rcpthmt5zuowlykye.pdf	./txt/work_b74gnkd46rcpthmt5zuowlykye.txt