Two more new papers add to the voluminous paleoclimate evidence that most of the last 10,000 years were much warmer than modern.
The globe was about 4 to 6°C warmer than it is today between 9000 and 6000 years ago, when CO2 concentrations centered around 265 ppm.
Image Source: ScienceDaily.com
Some regions exceeded the 4 to 6°C global average.
Northeastern China, for example, has been determined to have been between 7-10°C warmer than today during the Early Holocene (Liu et al., 2019, Zheng et al., 2018, Peterse et al., 2014, Jia et al., 2013, Gao et al., 2012).
New paleoclimate evidence even suggests the 19th century may even have been ~1.7°C warmer on average than the 20th century in this region (Jiang et al., 2019).
Of course, none of these temperature values are consistent with the claim that the Earth’s surface temperatures are significantly determined by changes in atmospheric CO2 concentrations.
Image Source: Liu et al., 2019
Image Source: Zheng et al., 2018