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

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

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

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

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

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

A new study published in Frontiers in Plant Science assessed samples from 25 Scots pine trees and 54 common juniper shrubs from a site high on Mount Iškoras in northern Norway. These samples and ...

Scientists in Norway have found blue rings in trees that hint at how volcanic eruptions disrupted growth throughout history. When scientists test tree samples to study the ages through their rings, ...

Scientists studying tree rings in northern Norway have linked ‘blue’ rings, caused by cold summers, to volcanic eruptions ...

When the going gets cold, even tough trees struggle with growing. Trees need a certain number of warm days in their growing seasons to grow properly ...