The Correlation. Correlation is a measue of how close the line fits the points that you found in your experiment. Anyone can say whether they think the line is a good fit or not, but to measure it exactly, we use the correlation coefficient: R2.
As the seasons change and the amount of sunlight decreases, less chlorophyll is produced, and the leaves appear less green. Chlorophyll is broken down into simpler compounds at a constant rate, so green leaf color will gradually fade as chlorophyll production slows or stops.
Typically,around what time do the aspen trees begin to change color in the Clark area of Colorado? I'm not looking for peak color, but would they have normally started to change at all during the first week of September? Or is that still too early to see any color? One destination mentioned in this post.