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Tree Trunks Found Under Glaciers 600M Atop Today’s Tree Line, Dated To Last Ice Age

by Kenneth Richard
December 26, 2018, 9:11 AM
in News and Opinion
Reading Time: 2 mins read
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Ice Age Tree TrunkBetween 60 and 40 thousand years ago, during the middle of the last glacial, atmospheric CO2 levels hovered around 200 ppm – half of today’s concentration.

Tree remains dated to this period have been discovered 600-700 meters atop the modern treeline in the Russian Altai mountains.

This suggests surface air temperatures were between 2°C and 3°C warmer than today during this glacial period.

Tree trunks dating to the Early Holocene (between 10.6 and 6.2 thousand years ago) have been found about 350 meters higher than the modern treeline edge.

This suggests summer temperatures were between 2°C and 2.5°C warmer than today during the Early Holocene when CO2 concentrations ranged between about 250 and 270 ppm.

None of this paleoclimate treeline or temperature evidence correlates with a CO2-driven climate.


Ganyushkin et al., 2018     Full Paper

“Samples of wood having an age of 10.6–6.2 cal ka BP were [the Early Holocene]found about 350 m higher than the present treeline. It seems that the summer temperature was 2.0–2.5 °C higher and annual precipitation was double that of the present day”

“Buried wood trunks by a glacier gave ages between 60 and 28 cal ka BP and were found 600–700 m higher than the present upper treeline. This evidences a distinctly elevated treeline during MIS 3a and c. With a correction for tectonics, we reconstructed the summer warming to have been between 2.1 and 3.0 °C [higher than today].”

Holocene-Cooling-Russian-Altai-Mtns-Ganyushkin-2018

Image Source: Ganyushkin et al., 2018

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Comments 2

  1. 4TimesAYear says:
    6 years ago

    It’s not the only glacier they’ve found trees under – (and I love it whenever they dig up evidence that a melting glacier reveals an ancient civilization). It’s time to bury the whole man made climate claptrap.

  2. Sonnyhill says:
    6 years ago

    Not the kind of trees we’d use to make a hockey stick, eh professor Mann?

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