Project -- Phenology

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These images depict interannual variability in phenology, as represented by the dates of onset and offset of greenness. Onset is a general term meant to include many types of growth phenomenon such as budburst, leaf expansion, and grass greenup. Offset refers to the end of the growing season, including cessation of growth in conifers, leaf abscission, and grass brownoff. Summations of soil temperature, radiation, and precipitation were used to model onset; photoperiod, drought stress, and temperature were used to model offset.

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