https://climateemergencydeclaration.org/wp-content/uploads/2018/09/DontMentionTheEmergency2018.pdf
Average global temperature from 20,000
BC. Based on a graph by Jos Hagalaars
(2013) drawing on data from a number
of scientific papers.
https://ourchangingclimate.wordpress.com/2013/03/19/the-two-epochs-of-marcott/
https://www.realclimate.org/index.php/archives/2013/03/response-by-marcott-et-al/
https://tamino.wordpress.com/2013/03/22/global-temperature-change-the-big-picture/
Fascinating! There was a lot of disinfo about this graph - I did a blog post on it a couple years ago.
https://ourchangingclimate.wordpress.com/2013/03/19/the-two-epochs-of-marcott/
Now I don't feel so bad having taken a lot of time investigating the lies about this graph.
https://www.science.org/doi/10.1126/science.1228026
that's the study that the graph is based on.
Marcott, S. A., Shakun, J. D., Clark, P. U., & Mix, A. C. (2013). A Reconstruction of Regional and Global Temperature for the Past 11,300 Years. Science, 339(6124), 1198–1201. doi:10.1126/science.1228026
Globally Resolved Surface Temperatures Since The Last Glacial Maximum" Matthew B. Osman, Jessica E. Tierney, Jiang Zhu, Robert Tardif, Gregory J. Hakim, Jonathan King & Christopher J. Poulsen published November 10, 2021 Nature volume 599, pages 239–244 (2021) -----------
A recent study1 analyzing a global database of paleoclimate records found that no previous warm or cool period in the last 2,000 years—including the Roman Warm Period and the Medieval Warm Period (also called the Medieval Climate Anomaly)—occurred globally and synchronously.
So they want better precision still as of 2023
https://www.sciencedirect.com/science/article/pii/S0921818124002157
Interglacial conditions are likely to persist for at least 50,000 years under already-accumulated CO2 emissions and Earth's low eccentricity orbit. Continued increases in greenhouse gas emissions are likely to extend that persistence to around 500,000 years, suppressing the pronounced expression of Milankovitch cyclicity typical of the later Pleistocene Epoch. This major perturbation alone is sufficient to justify the Anthropocene as terminating the Holocene Epoch.
However, a more recent evaluation by the International Energy Agency demonstrated that methane may be responsible for as much as 30 % of global warming since 1900, 60 % of that contribution being anthropogenic; these figures include much data that have previously been under-reported (IEA, 2023).
Half the world's population experienced extreme heat last year
https://climatewest.ca/wp-content/uploads/2023/05/Danny-Blair.pdf
https://prairieclimatecentre.ca/
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