Robert Lee Hotz had a great piece over the weekend in the LA Times about phenology as a climate change detector:
By analyzing decades of records kept by regional maple sugar producers, climate researchers are finding clear evidence here of what Rex Marsh can feel in his bones.
The weather just isn’t what it used to be.
In Ohio and New York, through New England and into Canada, the maple sugaring season starts and ends earlier than a generation ago, University of Vermont researchers and other experts say.
Moreover, the daily temperature cycle of frost and thaw on which sap production depends also has been disrupted.
While officials argue over carbon emission controls and global warming treaties, tree farmers such as the Marsh family, along with gardeners, anglers and bird-watchers, sense the change in the air.