MAUNDER MINIMUM 1740: REPLAY IN 2020?
By Dennis T. Avery
The killer in the comparison is that the temperature surge after 1688 was followed by a sudden plunge into one of the coldest periods in the entire Little Ice Age! The cold of 1739-1740 was called The Great Frost, and it devastated Europe from Italy to Iceland.
The linkage? The Great Frost followed a period of very few sunspots — the Maunder Minimum (1645-1715). Today, we know that fewer sunspots predict colder temperatures, and the modern world has just undergone a similar dearth of sunspots, from 2007 to 2011.
During the Maunder period, Europe’s glaciers were much larger than today; it was the Little Ice Age, after all. But the glaciers didn’t advance during the sunspot dearth. The Winters of the 1730s were actually fairly warm. But, during and after the Winter of 1739, glaciers advanced strongly through France and Germany, and north into Sweden, Norway and Iceland, and didn’t retreat for the next 50 years!
Ireland suffered the most severely. In the depths of the Winter of 1739-1740, winds and terrible cold intensified. Rivers, lakes, and waterfalls froze and fish died in the first few weeks of the Great Frost. Coal dealers found their coal piles and unloading docks frozen solid. Mill-wheels froze, so the millers and bakers could produce no bread.
Ireland’s crucial potato crop — normally left in the ground until needed for food — froze underground. The tubers were ruined for food, and useless as seed for the following year. The following Spring came drought, and the winds remained fierce. The Winter wheat and barley sown the previous Fall died in the fields. Sheep and cattle died in the pastures. The Fall of 1740 saw a small harvest, but the dairy cattle had been so starved that few of them bore calves. Milk production plummeted as the cows’ milk dried up.
That Winter, blizzards ranged along the coast, and great chunks of ice sweeping down the River Liffey sank vessels in the harbor. Dublin wheat prices rose to all-time highs.
Meanwhile dysentery, smallpox, and typhus were ravaging a weakened population. Farm workers had seldom gone to town when they had food on their tables; now they wandered in seeking food or relief assistance — and died in great numbers.
The climate disaster finally ended in the Summer of 1741. An estimated 400,000 people had died. Desperation gripped the people following both the Great Frost and a warmer bad-weather famine from 1726 to 1730. The harsh variability of the Little Ice Age was being felt full force. Thousands of Irish families began immigrating to America. The emigration of Ulster Presbyterians, for example, peaked between 1740 and 1760. Ministers took whole congregations to the Carolinas and Virginia, where they found like-minded people and cheap farmland.
Usually, there’s about a ten-year lag between sunspot changes and their impact on earth’s temperatures. The sunspots began predicting lower temperatures about 2000, for instance, and the cooling trend began eight years later in 2007. Now the sunspot minimum that just ended is predicting quite serious cold, perhaps about 2020.
Don’t throw away your electric blankets — and make sure that greenhouse emissions limits don’t steal the electricity to heat them.
The Earth's Natural History, Global Climate Changes,
& the Future of Human Life & Civilization on the Planet:
Science, Ideology, & Public Policy
Political Environmentalism Versus Human Progress & Prosperity:
Policy Issues Relating to Energy, Environment,
& Natural Resources
Dennis T. Avery is an environmental economist for the Hudson Institute in Washington, D.C., as well as Director of the
Institute's Center for Global Food Issues (CGFI) and Editor of Global Food Quarterly, the newsletter of the CGFI.
Formerly, he was a senior policy analyst for the United States Department of State, where he won the National Intelligence
Medal of Achievement. He is co-author, with atmospheric physicist Fred Singer, of the book,Unstoppable Global
Warming: Every 1500 Years (Blue Ridge Summit, Pennsylvania: Rowman & Littlefield, 2006). Avery's book, Saving
the Planet With Pesticides and Plastic: The Environmental Triumph of High-Yield Farming (Washington, D.C.: Hudson
Institute, 1995 and 2000), continues to be popular as a readable overview of realistic agriculture for the future and for today.
Readers may write Avery at Post Office Box 202, Churchville, Virginia, 24421. Email: firstname.lastname@example.org
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