In order to grow properly, trees need an adequate period of warmth during their growing seasons; otherwise, the cell walls [… ...

Trees need a certain number of warm days in their growing seasons to grow properly; otherwise, the cell walls of new growth ...

But there's much more information to be gleaned from growth rings than simply a tree's age. This information comes to us through the science of dendrochronology. Tree rings can reveal more than ...

Blue growth rings in woody plant stems indicate years when cells failed to lignify properly due to summers that were too cold ...

Volcanic eruptions and cold summers leave lasting marks in the wood of northern trees, unlocking the secrets of past climate extremes.

These rings are not just a visual anomaly but serve as natural archives of past cold summers. Researchers studying samples ...

The scientists collected core samples from 25 Scots pine trees and stem discs from 54 juniper shrubs, creating paper-thin ...

Learn more about these signs of summertime cold, perhaps tied to volcanic activity in 1877 and 1902.

In Norway, scientists have found blue rings in trees that hint at how volcanic eruptions disrupted growth throughout history.

Strange blue rings found in Scandinavian trees leave scientists perplexed - Rings hint at unusually cold summers in Norway ...

These samples and shrubs revealed several characteristic “blue rings”, representing the years when they did not grow properly due to the cold climate. Trees require warm periods in a year to ...