Climate change’s instructive past

George Will wrote in the Washington Post:

We know, because they often say so, that those who think catastrophic global warming is probable and perhaps imminent are exemplary empiricists. They say those who disagree with them are “climate change deniers” disrespectful of science. Actually, however, something about which everyone can agree is that of course the climate is changing — it always is. And if climate Cassandras are as conscientious as they claim to be about weighing evidence, how do they accommodate historical evidence of enormously consequential episodes of climate change not produced by human activity? Before wagering vast wealth and curtailments of liberty on correcting the climate, two recent books should be considered. In “The Third Horseman: Climate Change and the Great Famine of the 14th Century,” William Rosen explains how Europe’s “most widespread and destructive famine” was the result of “an almost incomprehensibly complicated mixture of climate, commerce, and conflict, four centuries in gestation.” Early in that century, 10 percent of the population from the Atlantic to the Urals died, partly because of the effect of climate change on By George F. Will Opinion writer January 7 George F. Will writes a twiceweekly column on politics and domestic and foreign affairs. He began his column with The Post in 1974, and he received the Pulitzer Prize for Commentary in 1977. He is also a contributor to FOX News’ daytime and primetime programming. View Archive“the incredible amalgam of molecules that comprises a few inches of soil that produces the world’s food.” In the Medieval Warm Period (MWP), from the end of the ninth century to the beginning of the 14th, the Northern Hemisphere was warmer than at any time in the past 8,000 years — for reasons concerning which there is no consensus. Warming increased the amount of arable land — there were vineyards in northern England — leading, Rosen says, to Europe’s “first sustained population increase since the fall of the Roman Empire.” The need for land on which to grow cereals drove deforestation. The MWP population explosion gave rise to towns, textile manufacturing and new wealthy classes. Then, near the end of the MWP, came the severe winters of 1309­1312, when polar bears could walk from Greenland to Iceland on pack ice. In 1315 there was rain for perhaps 155 consecutive days, washing away topsoil. Upwards of half the arable land in much of Europe was gone; cannibalism arrived as parents ate children. Corpses hanging from gallows were devoured. Human behavior did not cause this climate change. Instead, climate warming caused behavioral change (10 million mouths to feed became 30 million). Then climate cooling caused social changes (rebelliousness and bellicosity) that amplified the consequences of climate, a pattern repeated four centuries later. In “Global Crisis: War, Climate Change and Catastrophe in the Seventeenth Century,” Geoffrey Parker, a history professor at Ohio State University, explains how a “fatal synergy” between climatological and political factors produced turmoil from Europe to China. What he calls “the placenta of the crisis” of that century included the Little Ice Age (LIA), between the 1640s and the 1690s. Unusual weather, protracted enough to qualify as a change in climate, correlated so strongly with political upheavals as to constitute causation. Facebook RSS  Whatever caused the LIA — decreased sunspot activity and increased seismic activity were important factors — it caused, among other horrific things, “stunting” that, Parker says, “reduced the average height of those born in 1675, the ‘year without a summer,’ or during the years of cold and famine in the early 1690s, to only 63 inches: the lowest ever recorded.” In northerly latitudes, Parker says, each decline of 0.5 degrees Celsius in the mean summer temperature “decreases the number of days on which crops ripen by 10 percent, doubles the risk of a single harvest failure, and increases the risk of a double failure sixfold,” For those farming at least 1,000 feet above sea level, this temperature decline “increases the chance of two consecutive failures a hundredfold.” The flight from abandoned farms to cities produced the “urban graveyard effect,” crises of disease, nutrition, water, sanitation, housing, fire, crime, abortion, infanticide, marriages forgone and suicide. Given the ubiquity of desperation, it is not surprising that more wars took place during the 17th­century crisis “than in any other era before the Second World War.” By documenting the appalling consequences of two climate changes, Rosen and Parker validate wariness about behaviors that might cause changes. The last 12 of Parker’s 712 pages of text deliver a scalding exhortation to be alarmed about what he considers preventable global warming. Neither book, however, supports those who believe human behavior is the sovereign or even primary disrupter of climate normality, whatever that might be. With the hands that today’s climate Cassandras are not using to pat themselves on the back for their virtuous empiricism, they should pick up such books. Read more from George F. Will’s archive or follow him on Facebook.

Global Warming

The 2010 volcanic eruption in Iceland, since its first spewing of volcanic ash, in just FOUR DAYS, NEGATED EVERY SINGLE EFFORT you have made in the past five years to control CO2 emissions on our planet, all of you. Of course, you know about this evil carbon dioxide that we are trying to suppress. It’s that vital chemical compound that every plant requires to live and grow and to synthesize into oxygen for us humans and all animal life. I know, it's very disheartening to realize that all of the carbon emission savings you have accomplished while suffering the inconvenience and expense of driving Prius hybrids, buying fabric grocery bags, sitting up till midnight to finish your kids "The Green Revolution" science project, throwing out all of your non-green cleaning supplies, using only two squares of toilet paper, putting a brick in your toilet tank reservoir, selling your SUV and speedboat, vacationing at home instead of abroad, nearly getting hit every day on your bicycle, replacing all of your $.50 light bulbs with $8 LED light bulbs. Well, all of those things you have done have all gone down the crapper in just four days.

The volcanic ash emitted into the Earth's atmosphere in just four days. Yes, FOUR DAYS by that volcano in Iceland has totally erased every single effort you have made to reduce the evil beast, carbon. And there are around 200 active volcanoes on the planet spewing out this crud at any one time - EVERY DAY.

I don't really want to rain on your parade too much, but I should mention that when the volcano Mt. Pinatubo erupted in the Philippines in 1991, it spewed out more greenhouse gases into the atmosphere than the entire human race had emitted in all its years on earth. Yes, folks, Mt. Pinatubo was active for over one year! Think about it!

Of course, I shouldn't spoil this 'touchy-feely tree-hugging' moment and mention the effect of solar and cosmic activity and the well-recognized 800-year global heating and cooling cycle, which keeps happening despite our completely insignificant efforts to affect climate change.

And I do wish I had a silver lining to this volcanic ash cloud, but the fact of the matter is that the bush fire season across the western USA and Australia this year alone will negate your efforts to reduce carbon in our world for the next two to three years. And it happens every year. Just remember that your government just tried to impose a whopping carbon tax on you, on the basis of the bogus 'human-caused' climate-change scenario.

Hey, isn’t it interesting how they don’t mention 'Global Warming' anymore, but just 'Climate Change' - you know why? It’s because the planet has COOLED by 0.7 degrees in the past few years and these global warming bull artists got caught with their pants down. And, just keep in mind that you might yet have an Emissions Trading Scheme - that whopping new tax - imposed on you that will achieve absolutely nothing except make you poorer. It won’t stop any volcanoes from erupting, that’s for sure.