It has happened before. In his book Global Crisis: War, Climate Change & Catastrophe in the Seventeenth Century, historian Geoffrey Parker writes:
“The development of telescopes as astronomical instruments after 1609 enabled observers to track the number of sunspots with unprecedented accuracy. They noted a ‘maximum’ between 1612 and 1614, followed by a ‘minimum’ with virtually no spots in 1617 and 1618, and markedly weaker maxima in 1625-26 and 1637-9. And then, although astronomers around the world made observations on over 8,000 days between 1645 and 1715, they saw virtually no sunspots: The grand total of sunspots observed in those 70 years scarcely reached 100, fewer than currently [the book was published in 2013] appear in a single year. This striking evidence of absence suggests a reduction in solar energy received on earth.”
The result of the “Maunder Minimum” of sunspots was a so-called Little Ice Age, with significantly colder temperatures in the temperate zones, low crop yields to the point of famine and, Parker writes, “a greater frequency of severe weather events—such as flash floods, freak storms, prolonged drought and abnormal (as well as abnormally long) cold spells.”
Monday, January 20, 2014
The Threat of Global Cooling
Michael Barone discusses the threat of global cooling at the Washington Examiner, noting that our current lack of solar activity mirrors that of the Maunder Minimum, or "Little Ice Age."