Arctic Ice Melt

George Monbiot of the Guardian (United Kingdom) wrote the following article on August 28th:

The belief that Europe and America will be hit least by climate change is in ruins. Yet all we do is try to profit from disaster.

There are no comparisons to be made. This is not like war or plague or a stock market crash. We are ill-equipped, historically and psychologically, to understand it, which is one of the reasons why so many refuse to accept that it is happening.

What we are seeing, here and now, is the transformation of the atmospheric physics of this planet. Three weeks before the likely minimum, the melting of Arctic sea ice has already broken the record set in 2007. The daily rate of loss is now 50% higher than it was that year. The daily sense of loss – of the world we loved and knew – cannot be quantified so easily.

The Arctic has been warming roughly twice as quickly as the rest of the northern hemisphere. This is partly because climate breakdown there is self-perpetuating. As the ice melts, for example, exposing the darker sea beneath, heat that would previously have been reflected back into space is absorbed.

This great dissolution, of ice and certainties, is happening so much faster than most climate scientists predicted that one of them reports: “It feels as if everything I’ve learned has become obsolete.” In its last assessment, published in 2007, the Intergovernmental Panel on Climate Change (IPCC) noted that “in some projections, Arctic late-summer sea ice disappears almost entirely by the latter part of the 21st century”. These were the most extreme forecasts in the panel’s range. Some scientists now forecast that the disappearance of Arctic sea-ice in late summer could occur in this decade or the next.

As I’ve warned repeatedly, but to little effect, the IPCC’s assessments tend to be conservative. This is unsurprising when you see how many people have to approve them before they are published. There have been a few occasions – such as its estimate of the speed at which glaciers would be lost in the Himalayas – on which the panel has overstated the case. But it looks as if these will be greatly outnumbered by the occasions on which the panel has understated it.

The melting disperses another belief: that the temperate parts of the world – where most of the rich nations are located – will be hit last and least, while the poorer nations will be hit first and worst. New knowledge of the way in which the destruction of the Arctic sea ice affects northern Europe and North America suggests that this is no longer true. A paper published earlier this year in Geophysical Research Letters shows that Arctic warming is likely to be responsible for the extremes now hammering the once-temperate nations.

The north polar jet stream is an air current several hundred kilometres wide, travelling eastwards around the hemisphere. The current functions as a barrier, separating the cold, wet weather to the north from the warmer, drier weather to the south. Many of the variations in our weather are caused by great travelling meanders – Rossby waves – in the jet stream.

Arctic heating, the paper shows, both slows the Rossby waves and makes them steeper and wider. Instead of moving on rapidly, the weather gets stuck. Regions to the south of the stalled meander wait for weeks or months for rain; regions to the north (or underneath it) wait for weeks or months for a break from the rain. Instead of a benign succession of sunshine and showers, we get droughts or floods. During the winter a slow, steep meander can connect us directly to the polar weather, dragging severe ice and snow far to the south of its usual range. This mechanism goes a long way towards explaining the shift to sustained – and therefore extreme – weather patterns around the northern hemisphere.

I have no idea what is coming to Europe and North America this winter and next summer, in the wake of the record ice melt, but it’s unlikely to be pleasant. Please note that this record represents a loss of about 30% of Arctic sea ice, against the long-term average. When that climbs to 50% or 70% or 90%, the impacts are likely to be worse.

Our governments do nothing. Having abandoned any pretence of responding to the environmental crisis during the Earth summit in June, now they stare stupidly as the ice on which we stand dissolves. Nothing – or worse than nothing. Their one unequivocal response to the melting has been to facilitate the capture of the oil and fish it exposes.

The companies that caused this disaster are scrambling to profit from it. On Sunday Shell requested an extension to its exploratory drilling period in the Chukchi Sea, off the north-west coast of Alaska. This would push its operations hard against the moment when the ice re-forms and any spills they cause are locked in. The Russian oil company Gazprom is using the great melt to try to drill in the Pechora Sea, north-east of Murmansk. After turning its Arctic lands in the Komi republic into the Niger delta of the north (repeated oil spills are left unremediated in the tundra), Russia wants to extend this industry into one of the world’s most fragile ecosystems, where ice, storms and darkness make decontamination almost impossible.

As I write, activists from Greenpeace, whom I regard as heroes, are chained to Gazprom’s supply vessel, preventing the rig from operating. These people are stepping in where all governments have failed. David Cameron, who still claims to lead the greenest government ever, is no longer hugging huskies. In June he struck an agreement with the Norwegian prime minister “to enable sustainable development of Arctic energy”. Sustainable development, of course, means drilling for oil.

Is this how our children will see it: that we destroyed the benign conditions that made our world of wonders possible, and then used the opportunity to amplify the damage? All of us, of course, can claim to have acted with other aims in mind, or not to have acted at all, as the other immediacies of life seemed more important. But – unless we respond at last – the results follow as surely as if we had sought to engineer them.

Stupidity, greed, passivity? Just as comparisons evaporate, so do these words. The ice, that solid platform on which, we now discover, so much rested, melts into air. Our pretensions to peace, prosperity and progress are likely to follow. “And like the baseless fabric of this vision, / The cloud-capp’d towers, the gorgeous palaces, / The solemn temples, the great globe itself, / Ye all which it inherit, shall dissolve.”

>>> George Monbiot is a prolific author; his latests books are “Heat: How to Stop the Planet Burning” and “Bring on the Apocalypse.” <<<

Dr. James Hansen

 Climate Change is Already Here

By James E. Hansen, Director of the NASA

Goddard Institute for Space Studies.

When I testified before the Senate in the hot summer of 1988 , I warned of the kind of future that climate change would bring to us and our planet. I painted a grim picture of the consequences of steadily increasing temperatures, driven by mankind’s use of fossil fuels.

But I have a confession to make: I was too optimistic.

My projections about increasing global temperature have been proved true. But I failed to fully explore how quickly that average rise would drive an increase in extreme weather.

In a new analysis of the past six decades of global temperatures, which will be published Monday, my colleagues and I have revealed a stunning increase in the frequency of extremely hot summers, with deeply troubling ramifications for not only our future but also for our present.

This is not a climate model or a prediction but actual observations of weather events and temperatures that have happened. Our analysis shows that it is no longer enough to say that global warming will increase the likelihood of extreme weather and to repeat the caveat that no individual weather event can be directly linked to climate change. To the contrary, our analysis shows that, for the extreme hot weather of the recent past, there is virtually no explanation other than climate change.

The deadly European heat wave of 2003, the fiery Russian heat wave of 2010 and catastrophic droughts in Texas and Oklahoma last year can each be attributed to climate change. And once the data are gathered in a few weeks’ time, it’s likely that the same will be true for the extremely hot summer the United States is suffering through right now.

These weather events are not simply an example of what climate change could bring. They are caused by climate change. The odds that natural variability created these extremes are minuscule, vanishingly small. To count on those odds would be like quitting your job and playing the lottery every morning to pay the bills.

Twenty-four years ago, I introduced the concept of “climate dice” to help distinguish the long-term trend of climate change from the natural variability of day-to-day weather. Some summers are hot, some cool. Some winters brutal, some mild. That’s natural variability.

But as the climate warms, natural variability is altered, too. In a normal climate without global warming, two sides of the die would represent cooler-than-normal weather, two sides would be normal weather, and two sides would be warmer-than-normal weather. Rolling the die again and again, or season after season, you would get an equal variation of weather over time.

But loading the die with a warming climate changes the odds. You end up with only one side cooler than normal, one side average, and four sides warmer than normal. Even with climate change, you will occasionally see cooler-than-normal summers or a typically cold winter. Don’t let that fool you.

Our new peer-reviewed study, published by the National Academy of Sciences, makes clear that while average global temperature has been steadily rising due to a warming climate (up about 1.5 degrees Fahrenheit in the past century), the extremes are actually becoming much more frequent and more intense worldwide.

When we plotted the world’s changing temperatures on a bell curve, the extremes of unusually cool and, even more, the extremes of unusually hot are being altered so they are becoming both more common and more severe.

The change is so dramatic that one face of the die must now represent extreme weather to illustrate the greater frequency of extremely hot weather events.

Such events used to be exceedingly rare. Extremely hot temperatures covered about 0.1 percent to 0.2 percent of the globe in the base period of our study, from 1951 to 1980. In the last three decades, while the average temperature has slowly risen, the extremes have soared and now cover about 10 percent of the globe.

This is the world we have changed, and now we have to live in it — the world that caused the 2003 heat wave in Europe that killed more than 50,000 people and the 2011 drought in Texas that caused more than $5 billion in damage. Such events, our data show, will become even more frequent and more severe.

There is still time to act and avoid a worsening climate, but we are wasting precious time. We can solve the challenge of climate change with a gradually rising fee on carbon collected from fossil-fuel companies, with 100 percent of the money rebated to all legal residents on a per capita basis. This would stimulate innovations and create a robust clean-energy economy with millions of new jobs. It is a simple, honest and effective solution.

The future is now. And it is hot.

NOTE:  THE ABOVE OPINION-EDITORIAL WAS PUBLISHED IN THE WASHINGTON POST ON AUGUST 3, 2012.   SEE ALSO THE FOLLOW-UP ANALYSIS OF THIS ARTICLE PUBLISHED HERE.