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NW Greenland Was ‘At Least 9°C’ Warmer Than Today And CO2 Was 300 PPM

by Kenneth Richard
February 17, 2023, 10:07 AM
in News and Opinion
Reading Time: 2 mins read
A A
4

northwest greenlandEvidence of abundant lakes and ponds and the remains of vascular plants, warmth-demanding beetles, sponges, and spruce forests…in a newly-discovered organic-rich deposit 480 m above sea level in High Arctic (76.4°N) northwest Greenland indicates the local climate was similar to today’s southern Greenland (~60°N) and North America during the Early Pleistocene ice age.

Scientists analyze the habitat temperature thresholds for modern plants, trees, insects, mammals, etc., and compare these values to the climate conditions these same species were living in according to the paleoclimate fossil record to determine how much warmer (or colder) the past was relative to the present.

About two million years ago (Early Pleistocene), CO2 levels were estimated to have hovered around 300 ppm.

A glacier site in northwest Greenland, Pingorsuit, sits 480 m above sea level. It is currently covered in “continuous permafrost” that is still 25 cm thick in July (Bennike et al., 2023). Modern mean July temperatures only reach 1-2°C here.

Organic deposits discovered at this site in 2019 reveal the climate was much warmer than today during the Early Pleistocene.

Picea mariana (spruce) existed at this High Arctic location at that time, but the growth limit latitude for P. mariana today is only the southern tip of Greenland and North America.

The Early Pleistocene presence of several varieties of vascular plants at Pingorsuit further suggests the site had a sub-Arctic or boreal climate that averaged 10°C or warmer during July, or “at least 9°C higher than at present.”

“At the Pingorsuit Glacier in North-West Greenland, an organic-rich deposit was discovered at an elevation of 480 m above sea level. The sediments contained remains of vascular plants, mosses, beetles, caddisflies, midges, bryozoans, sponges, and other invertebrates. The fossils were deposited in a boreal environment with a mean July air temperature that was at least 9 °C higher than at present.”

The Beaver Pond site at 78°N was so warm and permafrost-free during the mid-Pliocene (~3-4 million years ago) that it could accommodate grass-grazing megafaunas such as horses and deer.

Even camels lived in the High Arctic at this time.

There appears to be no evidence supporting the claim that the High Arctic’s modern climate is unusually warm relative to the past, or when there were allegedly much lower CO2 ppm values.

Top image: NW Greenland as captured by the Copernicus Sentinel-3 mission.

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Comments 4

  1. Drewski says:
    3 years ago

    So the paper referenced in this article says that Greenland was warmer 2.5 million years (Early Pleistocene) ago but it says NOTHING about CO2 levels at 300ppm.
    Just another hit piece for the benefit of illiterate morons who believe the trash this website promotes.

    • Gumnut says:
      3 years ago

      If those who see your comment are illiterate, pray tell, why did you write a response?

      That would be a pretty pointless thing to do. But, then, who am I to call myself a genius, even if I do qualify by any normal definition, because I’m replying to a brainwashed drone…

      Sometimes one just has to slum it, though. Just to make a point. But don’t expect me to read your reply. If I did so, then I really wouldn’t be that clever.

      • Drewski says:
        3 years ago

        Yes “I” am the brainwashed drone.
        Even though I back up everything I say with peer-reviewed scientific studies and I seem to be the only one here that actually reads the studies that CCD articles promote only to find out that the articles lied about what is in their cited studies (case in point is above).

        It appears that I am replying to yet another willfully-ignorant and scientifically-challenged moron.

  2. Gumnut says:
    3 years ago

    But did it have polar bears?

    There’s got to be a dying polar bear somewhere, in any Arctic eco-science. It’s obligatory, as far as I can tell.

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