Don’t for one second believe the lies you read in the media and hear from climate scientists about unprecedented warming at the current time. The Earth was far warmer earlier in this interglacial period. A study looking at sea life residues around Brazil is one more piece of research verifying this. Some of the study is just a technical discussion about the methods of determining the age of shells, but the thrust is that about 6,000 to 7,000 years temperatures were probably 3 degrees Centigrade warmer than today and sea levels much higher. (QSR Article)
Judith Curry runs a website “climate Etc. ”
One of articles a few months ago was titled “Natural Selection of Bad Science”. One of the topics was addressing Aleatoric uncertainty and Epistemic uncertainty.
Alearotic uncertainty is the uncertainty in the data (did measure the temperature correctly or is the proxy an accurate reflection of the temp)
Epistemic uncertainty is the lack of knowledge – what pieces of data do we not know exists.
Both types of uncertainty are a major deficiency in paleo reconstructions.
Aleartoric uncertainty – How well do each proxy reconstructions reflect the temperature from that proxy and how well does the composite of proxies represent the global or regional temperatures.
Epistemic uncertainty is a bigger problem in the proxy reconstructions. As noted by Steve McIntyre at Climate Audit. The entire southern hemisphere has very few long proxies that extend back to the medieval warming period. How can the proxy reconstructions be a reasonable approximation of temps for the southern hemisphere when so much is unknown.
A separate issue is the failure to reconcile descreptancies in the historical written record with the individual proxies, but that topic is for another day.