TSI (Total Solar Irradiance) is the solar radiative power per unit area incident on the Earth’s upper atmosphere. A decline in TSI from 1945 to 1977 coincided with 30 years of global temperatures cooling, even as CO2 emissions soared.
This fact is of course hugely inconvenient to purveyors of the ”man-made global warming” narrative, so they simply choose to ignore it.
Similarly, historical accounts confirm the world-wide occurrence of the Medieval Warm Period. It was a time of warm climate from about 900 AD to 1300 AD, and was considerably warmer than the 20th / 21st century.
Its effects were evident in Europe, where grain crops flourished, many new cities arose, and the population more than doubled. The Vikings took advantage of the climatic amelioration to colonize Greenland (Grønland), and wine grapes were grown as far north as Hadrian’s Wall in England, and about 500 km north of present vineyards in France and Germany.
This period of relative warmth and prosperity was followed by the ”Little Ice Age” from about 1300 AD. The change from the warmth of the Medieval Warm Period to the cold of the Little Ice Age was abrupt and devastating, leading to the Great Famine from 1310 to 1322.
More recently, following the early 20th-century warm period (1915–1945), the world’s climate cooled for 30 years.
Global temperature changes occur naturally, and did so long before atmospheric CO2 began to increase. But what chance does evidence-based climate science have of even being heard nowadays, in the current atmosphere of evangelism, hysteria, and academic censorship ?