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Pigment concentrations in pine and spruce needle tissues collected at the Niwot Ridge AmeriFlux Core site in Colorado. The dataset includes measurements for Chlorophyll A and B, Violaxanthin, Antheraxanthin, Zeaxanthin, Neoxanthin, Lutein, and beta-Carotene, taken from sun foliage every 4-8 weeks during the summers of 2017 and 2018. It was produced by the National Aeronautics and Space Administration to evaluate seasonal changes in photosynthesis down-regulation.
License is specified as 'other-license-specified' on Data.gov, requiring users to check specific terms. The dataset is available in multiple file formats (HTML, PDF, BIN, ISO, ZIP, JPEG), but the primary data format is unclear.