Figure 3 (IMAGE) Tohoku University Caption Observations of birch leaves in the autumn foliage stage over a two-week period. (Top) Time-course changes across eight wavelengths. (Middle) Variation in sunlight intensity. (Bottom) Actual changes in leaf color. As the green color shifts to yellow and brown, changes in reflectance can be observed. Credit ©Kohzuma and Miyamoto Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original content 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.