Learn more about these signs of summertime cold, perhaps tied to volcanic activity in 1877 and 1902.
Scientists studying tree rings in northern Norway have linked ‘blue’ rings, caused by cold summers, to volcanic eruptions ...
Volcanic eruptions and cold summers leave lasting marks in the wood of northern trees, unlocking the secrets of past climate extremes.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback