Fig. 3From: In situ measurement of Scots pine needle PRIThe seasonal dynamics of a exposed and b shaded shoots; c the temporal trajectories of exposed shoots (trees “B” and “C”) on overcast and sunlit days; and d the temporal trajectories of sunlit and shaded shoots (trees “A” and “B”) under all sky conditions (overcast, broken and clear). Bars indicate 90% confidence limits for mean PRIBack to article page