In order to grow properly, trees need an adequate period of warmth during their growing seasons; otherwise, the cell walls […] The post These Bizarre Blue Tree Rings Are Unveiling Details About Cold ...

Zones 5-9. J. procumbens ‘Nana’– This Japanese type of juniper shrub forms a dense mat of prickly blue-green needles that turn slightly purplish in winter. It grows slowly to 6-12 inches ...

Overall, only 2.1% of the pine trees' rings and 1.3% of the juniper shrubs' rings were blue; the cells which hadn't lignified properly were mainly found at the end of growth rings, in latewood ...

Since trees and shrubs can live for hundreds of years, identifying these blue rings allows us to spot cold summers in the past. By looking at pine trees and juniper shrubs from northern Norway ...

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Selecting Mount Iškoras in Norway for a search for blue rings, a team of researchers took samples from 25 pine trees and 54 juniper shrubs, representing the species Pinus sylvestris and Juniperus ...

Scientists studying pine trees and juniper shrubs in northern Scandinavia are revealing the weather of the past by looking at tree rings — which can tell us far more than just the trees’ age. ‘Blue’ ...