Blue rings in trees and shrubs: traces of past cold summers caused by volcanic eruptions
Blue rings in the wood of trees and shrubs indicate particularly cold summers during which the cell walls of the wood fail to lignify entirely. By analysing the rings of Scots pines and common junipers in Norway, we identified two extreme climatic events in 1877 and 1902, likely linked to the volcan...
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| Main Authors: | , |
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| Format: | Article |
| Language: | Italian |
| Published: |
Italian Society of Silviculture and Forest Ecology (SISEF)
2025-06-01
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| Series: | Forest@ |
| Subjects: | |
| Online Access: | https://foresta.sisef.org/contents/?id=efor4832-022&lang=en |
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| Summary: | Blue rings in the wood of trees and shrubs indicate particularly cold summers during which the cell walls of the wood fail to lignify entirely. By analysing the rings of Scots pines and common junipers in Norway, we identified two extreme climatic events in 1877 and 1902, likely linked to the volcanic eruptions of Cotopaxi in Ecuador and Mount Pelée in Martinique. Blue rings were more frequent in pines than in junipers, suggesting their greater sensitivity to cooling conditions. This evidence provides new insights into reconstructing past climates and understanding the global impact of volcanic eruptions, paving the way for future climate change research. |
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| ISSN: | 1824-0119 |