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

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

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

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

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

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.

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