Blue growth rings in woody plant stems indicate years when cells failed to lignify properly due to summers that were too cold ...
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Blue rings in Arctic trees expose a 150-year log of climate chaosHow extreme weather leaves a lasting mark on trees and shrubs POZNAŃ, Poland — In the Arctic’s harsh borderlands, where trees wage a constant battle for survival, an international research team has ...
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.
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