"What elevates the past four years above the previous ones is an El Nino event, the strongest one on record. As we have said many time before an El Nino is not a climatic phenomenon, it is weather. What’s more, after its peak in 2016 the global temperature has fallen by around 0.4° C. (.74F)"
New study, "The Medieval Climate Anomaly in South America," published in the journal Quaternary International, October 31, 2018: "MCA (Medieval Climate Anomaly) warming in South America and the NH appears to have occurred largely synchronous, probably reaching comparable intensities."
Climatologist Dr. John Christy ridicules the New York Times: 'I knew the Times story was designed to create alarm and promote the claim that humans who use carbon-based energy (gasoline, natural gas, coal) to help them live better lives are making our summers ever more miserable. Be aware reader, this webtool is not designed to provide accurate information.' ...
'Not only are summer daytime temperatures not rising, they have actually fallen over the last 136 years. After looking at the graph, why do you suppose the Climate Impacts Lab decided to start their charts in 1960?'