The thickness of this ring depends on how much the tree grows during the year—favorable growing conditions result in a fat ring, unfavorable conditions in a narrow ring. And because trees in a ...

More information: Blue rings in trees and shrubs as indicators of early and late summer cooling events at the northern treeline, Frontiers in Plant Science (2025). DOI: 10.3389/fpls.2024.1487099 ...

Because tree rings tend to grow wider in warmer, wetter years and thinner in drier, colder years, they act as a record of natural climate variability and offer a complementary approach to model ...