Fluorescence Tracks Photosynthesis (image) University of Utah Share Print E-Mail Caption The seasonal dynamics of the solar-induced fluorescence (SIF, red line) closely tracks the cumulative daily Gross Primary Production (GPP, black line) in the conifer forest at Niwot Ridge, Colorado. Credit Adapted from Magney et al. PNAS (2019) Usage Restrictions non-commercial with attribution Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.