26 October 2011 Estimating vegetation phenological trends using MODIS NDVI time series
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The method to extract phenological information for different land cover types is presented. Phenological features are two different start dates of growing season, date of maximum growth, end of growing season and two growing season lengths. Also, quality indicators are estimated for some phenological features. The method is based on NDVI-time series extracted from MODIS-images. The errors between extracted dates and in-situ measurements are reasonably small. For example, the residuals of the estimation of the start of Flux Growing Season are on only 2 days for broadleaf forest in one Southern Finland hydrological drainage basin. The method has been tested on Northern Boreal forest zone, where there are freezing temperatures and snow during winter.
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Markus Törmä, Markus Törmä, Mikko Kervinen, Mikko Kervinen, Saku Anttila, Saku Anttila, } "Estimating vegetation phenological trends using MODIS NDVI time series", Proc. SPIE 8181, Earth Resources and Environmental Remote Sensing/GIS Applications II, 81810P (26 October 2011); doi: 10.1117/12.898062; https://doi.org/10.1117/12.898062

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