We all learned the basics of how and why leaves change color in the fall. But on this edition of Outdoor Radio, we take a deeper look at the chemistry of foliage.
Biologists Sara Zahendra and Kent McFarland are tromping through the snow to study the leaves with Joshua Halman, a Forest Health Specialist with the Vermont Department Of Forest, Parks and Recreation. Halman explains the phenology behind the yellows, oranges and reds that we see as the trees transition into winter.
The department has been monitoring Vermont's trees for 25 years, recording the color change and leaf drop in various places around the state. Halman says the work has documented the impact of climate change.
"Seen over this time, the peak color and the main time for leaf drop has actually become later,” Halman explains. “What we're seeing since we started recording our fall phenology data, that on the average, foliage is peaking about eight days later in that 25 year period."
Broadcast on October 22, 2015 and October 23, 2015