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Scientists Document No Clear Warming Role For CO2 During The Last Deglaciation – Or The Last 10,000 Years

A new paper indicates the rise in CO2 concentration occurred well after the Northern Hemisphere’s ocean circulation changes drove the abrupt warming (~11,700 years ago) that ended the last ice age – a lag that effectively leaves no causal role for CO2 during deglaciation.

Image Source: Muschitiello et al., 2019

Ice core evidence from Antarctica also affirms no causal link for CO2 during deglaciation.

Image Source: Uemura et al., 2018

The Holocene record itself also contradicts the narrative that says CO2 increases drive climate warming. For the last ~10,000 years, ocean temperatures, surface temperatures, and sea levels fell as CO2 concentrations rose.