Another powerful post by Clive Best on how earth’s surface temperatures change by means of changing meridional heat transfers. Meridional Warming.
The key point for me was seeing how the best geological knowledge proves beyond the shadow of a doubt how the earth’s climate profile shifts over time, as presented in the diagram above. It comes from esteemed paleoclimatologist Christopher Scotese. His compete evidence and analysis can be reviewed in his article Some thoughts on Global Climate Change: The Transition from Icehouse to Hothouse (here).
In that essay Scotese shows where we are presently in this cycle between icehouse and hothouse.
As of 2015 earth is showing a GMT of 14.4C, compared to pre-industrial GMT of 13.8C. According to the best geological evidence from millions of years of earth’s history, that puts us in the category “Severe Icehouse.” So, thankfully we are warming up, albeit very slowly.
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