Claim: The Temperature Spike Just Prior to the Little Ice Age can Teach Us about Modern Global Warming

According to Patric Seifert, a tropospheric researcher at the Leibniz Institute in Germany, a large scale temperature spike occurred just before the onset of the Little Ice Age. Seifert does…

Causation Of Climate Change: Was The Medieval Warm Period “Regional”?

Some commenters yesterday noted that the climate establishment has not just completely ignored the threat to their orthodoxy posed by the Medieval Warm Period and other similarly-warm pre-human-emissions eras. Initially,…

Study shows that Vikings enjoyed a warmer Greenland

Public Release: 6-Feb-2019 Study shows that Vikings enjoyed a warmer Greenland Chemistry of bugs trapped in ancient lake sediment shows a warm climate at a key time in Greenland’s history…

More evidence that the Medieval Warming Period was global, not regional

From the “we have to get rid of the Medieval Warming Period” department. Even though this paper was published in late 2017, it was recently highlighted in EoS, as shown…

Documenting the Global Extent of the Medieval Warm Period

Guest essay by Angus McFarlane Introduction In this article I pose the following questions: Was the Medieval Warm Period (MWP) a global event? Where the MWP temperatures higher than recent times?…

Seth Borenstein: "Man-made heat put in oceans has doubled since 1997"

Guest post by David Middleton WASHINGTON (AP) — The amount of man-made heat energy absorbed by the seas has doubled since 1997, a study released Monday showed. Scientists have long…

Baffin Island study disappoints: The illusive ‘coup de grace’ on the Medieval Warm Period

Guest essay by Sebastian Lüning Big news on 4. December 2015 by the Earth Institute of Columbia University. In a press release the institute claimed that climate and human history…

Evidence of the Medieval Warm Period in Australia, New Zealand and Oceania

By Sebastian Lüning Geoscientist and co-author of ‘The neglected Sun’ The climate of the pre-industrial past is of greatest importance to the ongoing climate discussion. Current climate can only be…

Study shows they are still trying to erase the 'Medieval Warm Period'

From the THE EARTH INSTITUTE AT COLUMBIA UNIVERSITY and the “must make the blade of the hockey stick flat” department comes this claim: Study undercuts idea that ‘Medieval Warm Period’…

Spot the portion of California drought caused by 'climate change'

From “The Hill”, even California Democrats aren’t buying the climate BS Obama and Holdren are selling on drought: (h/t to WUWT reader “Green Sand”) Voters don’t hear the words “climate…

The truth about 'We have to get rid of the medieval warm period'

In the thread Intelligence and the hockey stick commenter “Robert” challenged a well known quote about the MWP from 2006 by Dr. David Deming in his statement before the Senate EPW…

The Medieval Warm Period in the Arctic

Since the IPCC AR5 is again making news in talking about the Medieval Warm Period, this review from Craig Idso at CO2Science.org seems appropriate. -Anthony Medieval Warm Period (Arctic) —…

Michael Mann says climate models cannot explain the Medieval Warming Period – I say they can't even explain the present

Ice core data shows CO2 levels changed less than 10 parts per million from 1600-1800 during the MWP. From the Hockey Schtick:  A new paper from Schurer et al (with Mann…

Evidence for a Global Medieval Warm Period

From CO2Science: Medieval Warm Period (Antarctica) — Summary Was there a Medieval Warm Period somewhere in the world in addition to the area surrounding the North Atlantic Ocean, where its…