Scientific American, May 25, 2012
Climate scientists think a perfect storm of climate “flips” could cause massive upheavals in a matter of years
Adapted from The Fate of the Species: Why the Human Race May Cause Its Own Extinction and How We Can Stop It, by Fred Guterl (Bloomsbury USA, 2012).
The eminent British scientist James Lovelock, back in the 1970s, formulated his theory of Gaia, which held that the Earth was a kind of super organism. It had a self-regulating quality that would keep everything within that narrow band that made life possible. If things got too warm or too cold—if sunlight varied, or volcanoes caused a fall in temperatures, and so forth—Gaia would eventually compensate. This was a comforting notion. It was also wrong, as Lovelock himself later concluded. “I have to tell you, as members of the Earth’s family and an intimate part of it, that you and especially civilization are in grave danger,” he wrote in the Independent in 2006.
The world has warmed since those heady days of Gaia, and scientists have grown gloomier in their assessment of the state of the world’s climate. NASA climate scientist James Hanson has warned of a “Venus effect,” in which runaway warming turns Earth into an uninhabitable desert, with a surface temperature high enough to melt lead, sometime in the next few centuries. Even Hanson, though, is beginning to look downright optimistic compared to a new crop of climate scientists, who fret that things could head south as quickly as a handful of years, or even months, if we’re particularly unlucky. Ironically, some of them are intellectual offspring of Lovelock, the original optimist gone sour.
The true gloomsters are scientists who look at climate through the lens of “dynamical systems,” a mathematics that describes things that tend to change suddenly and are difficult to predict. It is the mathematics of the tipping point—the moment at which a “system” that has been changing slowly and predictably will suddenly “flip.” The colloquial example is the straw that breaks that camel’s back. Or you can also think of it as a ship that is stable until it tips too far in one direction and then capsizes. In this view, Earth’s climate is, or could soon be, ready to capsize, causing sudden, perhaps catastrophic, changes. And once it capsizes, it could be next to impossible to right it again.
The idea that climate behaves like a dynamical system addresses some of the key shortcomings of the conventional view of climate change—the view that looks at the planet as a whole, in terms of averages. A dynamical systems approach, by contrast, consider climate as a sum of many different parts, each with its own properties, all of them interdependent in ways that are hard to predict.
One of the most productive scientists in applying dynamical systems theory to climate is Tim Lenton at the University of East Anglia in England. Lenton is a Lovelockian two generations removed— his mentors were mentored by Lovelock. “We are looking quite hard at past data and observational data that can tell us something,” says Lenton. “Classical case studies in which you’ve seen abrupt changes in climate data. For example, in the Greenland ice-core records, you’re seeing climate jump. And the end of the Younger Dryas,” about fifteen thousand years ago, “you get a striking climate change.” So far, he says, nobody has found a big reason for such an abrupt change in these past events—no meteorite or volcano or other event that is an obvious cause—which suggests that perhaps something about the way these climate shifts occur simply makes them sudden.
Lenton is mainly interested in the future. He has tried to look for things that could possibly change suddenly and drastically even though nothing obvious may trigger them. He’s come up with a short list of nine tipping points—nine weather systems, regional in scope, that could make a rapid transition from one state to another.
Each year, the sun shines down on the dark surface of the Indian Ocean, and moist, warm air rises and forms clouds. This rising heat and the moisture form a powerful weather system, a natural pump that pulls up water and moves it in vast quantities hundreds of miles to the mainland. This is the Indian monsoon, which deposits rainfall on thousands of square miles of farmland. About a billion people, most of them poor, depend for their daily bread on crops that depend in turn on the reliability and regularity of the Indian monsoons.
India is a rapidly developing country with hundreds of millions of citizens who want to move into the middle class, drive cars and cool their homes with air-conditioning. It is also a country of poor people, many who still rely on burning agricultural waste to heat their homes and cook their suppers. Smoke from household fires has been a big source of pollution in the subcontinent, and it could disrupt the monsoons, too. The soot from these fires and from automobiles and buses in the ever more crowded cities rises into the atmosphere and drifts out over the Indian Ocean, changing the atmospheric dynamics upon which the monsoons depend. Aerosols (soot) keep much of the sun’s energy from reaching the surface, which means the monsoon doesn’t get going with the same force and takes longer to gather up a head of steam. Less rain makes it to crops.
At the same time, the buildup of greenhouse gases, coming mainly from developed countries in the northern hemisphere, has a very different effect on the Indian summer monsoons: it acts to make them stronger.
These two opposite influences make the fate of the monsoon difficult to predict and subject to instability. A small influence—a bit more carbon dioxide in the atmosphere, and a bit more brown haze—could have an out- size effect. Lenton believes that the monsoons could flip from one state to another as quickly as one year. What happens then is not a question that Lenton can answer with certainty, but he foresees two possibilities.
One is that the monsoons grow in force and intensity, but come less frequently. We have already seen hints of this in the newspapers. In the last few years rains have grown erratic and less frequent, but when they do come, they tend to dump an enormous amount of water, and in places where they wouldn’t normally do so. This is almost as bad for farmers as drought, since the rain falls on parched ground with extra force, and much of it runs off without soaking into the ground, and it causes damage to boot by washing away soil and plants. The flooding that devastated Pakistan in 2011 is a case in point. If this trend continued and strengthened in intensity, it would be bad news for the two thirds of the Indian workforce that depends on farming. It would be nasty for the Indian economy—agriculture accounts for 25 percent of GDP. A permanently erratic and harsh monsoon would depress crop yields, increase erosion on farms, and cause a rise in global food prices as India is forced to import more food.
The other possibility is even worse: the monsoons could shut down entirely. This would be an unmitigated catastrophe. A sudden stopping of monsoon rain, which accounts for 80 percent of rainfall in India, could throw a billion people into danger of starvation. It would change the Indian landscape, wiping out native species of plants and animals, force farms into bankruptcy, and exacerbate water shortages that are already creating conflict. The Indian government would almost certainly be unable to cope with a disaster of such proportions. Refugees by the hundreds of millions would stream into big cities such as Mumbai and Bangalore, looking for some hope of survival. It would create a humanitarian crisis of unprecedented proportions. Lenton foresees a similar danger of sudden change in the West African monsoon, the second tipping point.
Tipping point number three in Lenton’s list is the sea ice of the north pole. For years the ice has been thinning and retreating more and more during the summer. Soon it may disappear completely during the summer months. We may already have reached this tipping point—a transition to a new state in which the north pole is ice-free during summer months is already at hand. Eventually the north pole may flip and be free of ice year-round. The knock-on effects of such a transition would be huge—they would cause marked increase of warming at the pole, since open water absorbs more of the sun’s energy than ice-covered seas. The effect of a year-round ice-free north pole would be like heating Greenland on a skillet.
The fourth tipping point is Greenland’s glaciers, which hold enough water to cause sea levels to rise by more than twenty feet. It takes a while for that much ice to melt, of course. Currently, the Intergovernmental Panel on Climate Change projections say it will take on the order of a thou- sand years. Scientists currently don’t have a good handle on how such a big hunk of ice melts. For plenty of reasons it could happen much more quickly—recent observations suggest that the melting has not only exceeded what models predict, but has also begun to accelerate. A marked retreat of ice in coastal areas has led to an infusion of ocean water, which is relatively warm and promotes melting.
All this leads Lenton to conclude that the Greenland ice sheets could make a transition to an alternate state in three hundred years, rather than a thousand or more. Such a quick melting of Greenland would have a knock-on effect on the ocean currents that run up the Atlantic, bringing warmth to northern Europe and Scandinavia, the Atlantic thermohaline circulation. A sudden change in this current could plunge much of Europe back into an ice age. Scientists were getting nervous about this possibility a few years ago, until further research suggested that any switch in current is a long way off—perhaps a thousand years off. Lenton argues that an accelerated melting of Greenland would throw more freshwater on the northern Atlantic than these reassuring calculations have taken into account. “The canary in the coal mine is the Arctic losing its summer sea-ice cover,” says Lenton. “I am really worried about the Greenland ice sheet. It’s already losing mass and shrinking.”
If Greenland flipped into a completely ice-free state, it would cause massive rises in sea level—on the order of six or seven meters. Even if this took three hundred years to happen, “it would be an absolute disaster,” says Lenton, “a real game changer.” At such a rate of sea-level rise, it would be- come more and more difficult to protect coastlines. Low-lying areas would have to be abandoned. That includes cities such as New York, Los Angeles, San Francisco, London, Tokyo, and Hong Kong, not to mention the entire state of Florida and vast swaths of Indochina.
Tipping point number six—the west Antarctic ice sheet—is even scarier. It has enough ice on it to raise sea levels by about eighty meters. The ice is melting, but slowly—most worst-case scenarios give the ice centuries to melt. But there are some niggling doubts about whether the West Antarctic Ice Sheet could calve into the sea more quickly than expected, as the glaciers contract. If that happened, it would push sea levels up by five meters in as short a time as a century. Most experts consider this unlikely, but if it did happen, Lenton thinks the sheet could flip in as little time as three hundred years—three times faster than most models predict.
Water and ice aren’t the only worries. The Amazon rain forest, the seventh of Lenton’s tipping points, is also in jeopardy. Rain forests are always pretty wet, but they have dry seasons, and those dry seasons turn out to be a limiting factor on the survival of flora and fauna. As loggers reduce the number of trees that produce moisture to feed the gathering rains, the drier the dry seasons get, and the longer they last. Lately dry seasons in the Amazon have gotten more severe and have put a crimp on the survival of many of the trees that form the forest canopy, which is the backbone of the rain-forest ecosystem. As the dry season continues to lengthen, the flora draw more and more water from the soil, which eventually begins to dry out. The trees get stressed and begin to die. There’s more fodder on the forest floor for wildfires. This is not hypothetical; it’s already begun to happen. We saw this during the estimated twelve thousand wildfires that occurred in the Amazon during the drought of 2010. As the forest loses more and more trees, it loses its ability to feed the weather patterns with warm, moist air.
If and when the Amazon flips into a drier state, it would have an big effect of weather patterns. The Amazon is basically a big spot of wet tropics. Knock out the trees and lose that moist air, and the regional circulation pattern changes as well. A similar flip could occur in Canada’s boreal forests (tipping point number eight). A die-off of these forests would release much of the 50 billion to 100 billion tons of carbon now trapped in permafrost.
The basic weather patterns that we’ve grown used to on weather maps are also subject to rapid change. Among them is what’s called El Niño– Southern Oscillation—the ninth and last of Lenton’s tipping points. El Niño involves movement of a blob of warm water on the west side of the Pacific Ocean toward the east, bringing with it moist warm air. When this warm water cools and circulates back westward, El Niño comes to an end and La Niña begins. These two patterns alternate roughly every five years. From observations, scientists have begun to see a more erratic trade-off between these two patterns. They fret that the weather patterns could flip to some different state—perhaps a more frequent switching off between the patterns. That would have a detrimental effect on the Amazon, says Lenton, exacerbating trends that already threaten to destroy the rain forest.
The real nightmare scenario is when all these changes begin to rein- force one another. The Arctic loses its summer sea ice, causing Greenland’s ice to melt and encouraging the boreal forests to change as well. The freshwater runoff changes the thermohaline dynamics and affects the jet stream. The El Niño–Southern Oscillation and the Amazon interact in such a way as to reinforce one another, perhaps affecting the monsoon in India and Africa. “It wouldn’t be such a silly thing to say that if you meddle with one, you might affect the other,” says Lenton. “Which direction the causality would go is not always obvious. We know it’s connected, we know it’s nonlinear, we know they somehow couple together. When you see one change, you see changes in the other.”
“Then we start talking about domino dynamics,” says Lenton. “The worse case would be that kind of scenario in which you tip one thing and that encourages the tipping of another. You get these cascading effects.”
It would take a perfect storm of climate flips to get us to this particular worst-case scenario. If it does come to pass, however, at least it will happen quickly.
Earth 1, humans 0. Maybe it would be our just deserts (pun intended). I kinda get the feeling that in a few million years, some civilization a little more Earth-conscious might exist in our place. At that time, they might well have a few fossils which are all that remains of “modern” man :
“Oh yes – humans – they proved to be a failed evolutionary dead end. Good thing too”.
…”at least it will happen quickly”………..what a relief!
Solid stuff, Dr. B!
Look for my reply at http://www.protecttheocean.com/ocean-armageddon/ shortly.
Thanks for bringing this concept forward in such a convincing way. Perhaps if enough of us are preaching this truth, people will at least listen.
JT
Therefore we have nuclear weapons. A nuclear winter caused by mushroom clouds and smoke from burning cities will easily compensate global warming. Maybe Lovelock had that in mind, he was always fond of nuclear.
Or increased background radiation from burning spent fuel rods could eradicate humans altogether. http://mato48.wordpress.com/2012/06/18/do-you-like-nightmares/
Lot of options.
Soon all will take note to the sounds and rumbling of Volcanoes Around Earth that are Waking Up at a Alarming Rate. Just as they did in 1883 from Krakatoa.
Read well and study on your own after you have read this.
This is not a game or joke Our Sun gives off a Solar Wind all day year round if you live in the State of Alaska you see it in the sky above what a sight it is going through our Earth’s Magnet Polls of the North and the South, North Poll. It’s called the Northern Lights or the Aurora Borealis.
The day will come when you will be able to see it all over Earth as in the year 1859 Solar Flare, It was the largest in 500 years. Two Astronomer’s Hodgson and Carrington told the World that the Solar Flare made a Geomagnetic Storm reach Earth in hours not days. Back then it gave new meaning to Reach For The Skies from Telegraph Operators. For hours sparks flew from the key board. Even after the Batteries were disconnected. Nov 3 and 4, 2003 had a X40+ Class Solar Flare.
Our Sun’s UV Rays will get stronger as each passing day goes by, read and i will tell you why.
The Great big forest have be stripped from most of the Earth for Greed of Money by the Wicked. The trees are our Main Source of Oxygen on this Plant.
The Forest Trees scrubs the Pollution out of the air and makes Oxygen from the rain and dirt that it grows in.
The Forest Trees do more than just make Oxygen they stop Soil Erosion, just Look at the 1930 Dust Bowl. Greed by our Government taxes led farmers to clear cut all their Forest and farm all the land they were being Tax on. They had to farm it to pay for the Taxes. Why leave the Trees when food crop makes Money. This did not Help the Depression that effected most all Worldwide. This coming year more than 100 million will suffer from Malnutrition lack of food and Dehydration lack of water. Many will not make it and die!
Soon many will run out of Safe Drinking Water from pollution going into the world’s water supply.
In the United States of America alone more than 46 Million Americans Received Food Stamps and that number is going up every day every year for more than 4 years in a row now.
The Pollution and CO2 Carbon Dioxide go into the Tree Bark as a shield from most bugs so they do not eat the tree.
Less Forest less Oxygen this is why the moon. That has no Oxygen is very cold on the side without Sun Light, And hot as ever on the side with Sun Light. Way too cold and too hot to live there. You would need at least 10 times the Energy we use on Earth to even live there and life on the Moon would be very short.
With no blank of Oxygen to lessen or reduce the Sun’s UV Rays and Solar Wind they are deadly there on our Moon. Every Mt. Climber and Aircraft Pilot knows the higher you go the thinner the Oxygen and colder it gets.
Just spend a night on a Mt. top above 13,000 feet with no Sun Light and you will see or should i say feel the cold stinging any of your exposed skin. If you are new to Mt. Climbing stay below 10,000Ft. The Astronauts and the Cosmonauts and Fighter Pilots that i have been with for years know this very well, and the Radiation Hazards to humans at High Altitudes.
Soon the Sun’s Solar Wind and UV rays will be way to strong for most to go out in the Sun Light for even a short time. The Geomagnetic Storm to come and the Bad Weather Storms well you have not seen nothing yet and the Sea Level is Rising the Oceans. Many Millions have been affected by Floods in China and Pakistan just last year. In 2005 Over a Thousand dead in New Orleans flood, and the list going on. The sounds and rumbling of Volcanoes Around Earth are Waking Up at a Alarming rate.
And there shall be famines, and pestilences, and Earthquakes, in divers places such as was not from the beginning of the Creation.
The last 30 years On Earth we have broke all High Temp Records and the temp it is still going up. All the Worlds Ice Glacier are melting at an Accelerating Rate. The Glaciers and Polar Ice Caps store more water than all the Fresh Water Lakes on Earth. Many of them are drying up or water levels are going down past the lowest point every recorded.
The Bad Weather Storms now are Babies compared to what is to come.
They will get even bigger and worse less Oxygen the more UV Rays to the Earth and more Water molecules will evaporate and go up into the Earth’s Atmosphere. Less Oxygen the colder without sun light and hotter with it.
The Sky full of more water vapor molecules, more snow in the winter and more Flash Floods in the Summer. All earth will see way more fires and the Deserts are growing larger.
If every living person on Earth were to Plant A Tree Today we might have a chance.
The Earth’s Atmosphere Blanket surrounding it protects life on Earth as Our Lord and GOD will all that seek Him.
Then it is written when the tree is full it is harvest time. All the Earth will someday burn away.
This is all Foretold in the Bible Read it
and may our Lord Bless all that do so.
The Lord’s Little Helper
Paul Felix Schott
solardowork@yahoo.com
KI4-AEX
P.S.
2 Peter 3:10
But the day of the Lord will come like a thief, in which the heavens will pass away with a roar and the elements will be destroyed with intense heat, and the Earth and its works will be burned up.
GOD Bless You and Your Love ones
Give thanks to our Lord Jesus Christ every day.
Read
Matthew 24: 30-33
Earth is at its Limits
MANY OF US IN THE SCIENTIFIC COMMUNITY HAVE BEEN SAYING SOME OF THIS FOR YEARS
The United Nations is now taking a serious look into “Earth’s Limits” Earth will very soon be at its Limits of no return for many things including all life on Earth.
If we keep going at this rate we will not have another 20 years to go back to Rio De Janeiro to play. Most all in the Scientific Community said this 20 years ago at the last time Leaders set up this meeting in Rio De Janeiro. Of course on the Tax payers money, and of course they said about the same thing again we need to do something!
There is enough Energy from our Sun to Power all are needs on Earth and more. The richest on Earth are doing just that Building Solar Power Plants at a record pace.
Solar Energy
The Fastest growing energy on Earth.
Albert Einstein 100 years ago showed the World it could get
Free Energy, Electric from the SUN. (THE PHOTOVOLTAIC EFFECT).