Trees by this definition also have a crown that is closely coupled to the surrounding atmosphere (Körner 1998), as opposed to the shrubs and herbaceous vegetation that exist beyond the treeline.

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

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 sampled cores from 25 Scots pine trees and stem-base disks from 54 common juniper shrubs at a site high on the treeline of Mount Iškoras in northern Norway. The team cross ...

That’s according to a new study in Frontiers in Plant Science, which found strange blue rings in samples of trees and shrubs from the northern treeline in Norway. “Blue rings look like unfinished ...

The scientists sampled cores from 25 Scots pine trees and stem-base discs from 54 common juniper shrubs at a site high on the treeline of Mount Iškoras in northern Norway. The team cross ...

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