The Arctic Was 9°C Warmer Than Today During the Holocene Thermal Maximum – Watts Up With That?

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From the NoTricksZone

By Kenneth Richard on 8. July 2025

Holocene (11,700 to 8,200 years ago) Arctic (Svalbard) temperatures “were up to 9°C higher than today” according to the authors of a new Nature journal study. At that time CO2 was thought to only hover around 260 ppm.

Svalbard then cooled as CO2 rose for the next 8,000 years – a negative correlation that wholly contradicts the rising-CO2-drives-Arctic-warmth narrative.

Nonetheless, climate models are predicated on the assumption rising human CO2 emissions (RCP 8.5) will lead to a warming of ~8°C by 2100.

Image Source: Auer et al., 2025

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