Showing posts with label rapidly melting ice. Show all posts
Showing posts with label rapidly melting ice. Show all posts

Monday, October 1, 2012

50 Months to Save the World




by Andrew Simms
 
"One or other of us will have to go," Oscar Wilde is supposed to have said on his deathbed to the hated wallpaper in his room. The perilous acceleration of Arctic ice loss, and the imminent threat of irreversible climate change poses a similar ultimatum to the economic system that is pushing us over the brink. For society's sake I hope this time we redecorate. 

Fortunately, many people are queuing up to propose better designs, rather than just cursing the interiors, as you can read about here.

Monday 1 October marks the halfway point in a 100-month countdown to a game of climate roulette.

On a very conservative estimate, 50 months from now, the dice become loaded against us in terms of keeping under a 2C temperature rise. This level matters because beyond it an environmental "domino effect" is likely to operate. In a volatile and unpredictable dynamic, things like melting ice, and the release of carbon from the planet's surface are set to feed off each other, accelerating and reinforcing the warming effect.

The time frame follows an estimate of risk of rising greenhouse gas concentrations from the world's leading authority on climate change, the Intergovernmental Panel on Climate Change (IPCC), that passed a certain point, it will no longer be "likely" that we stay the right side of the line. Some consider even a 2C rise too much, but it is the limit that the EU and others have signed up to.

Extraordinarily, however, in spite of the stakes, the issue has receded from the political frontline like a wave shrinking down a beach. This could, though, merely be a prelude to it returning with a vengeance. Politicians may have turned their backs, others have not.

Here's what a broad selection of groups and individuals who range from the Women's Institute to Oxfam and Margaret Thatcher's former environmental adviser, say in an open letter published in the Guardian today to the coalition government and opposition:
"This year has seen the record loss of sea ice, and greenhouse gas concentrations above the Arctic at their highest point for possibly 800,000 years. Crop-wrecking droughts and record temperatures have scorched the American Mid-West."
But, to our dismay, climate change and the weather volatility it fuels have fallen far down the political agenda when it needs to be at the top. It remains, however, one of the greatest threats to human progress, and tackling it is a huge economic opportunity
They call on both the coalition and Labour to spell out what they will do differently in the next 50 months to prevent a climate catastrophe.

Individually some go further. James Gustave Speth, the former head of the United Nations Development Programme appeals for mass, non-violent protest.

The climate scientist Prof Kevin Anderson says it is too late for rich countries to "grow" their way out of the problem and must find a new way to run their economies. He says everyone, including climate scientists, must reduce their emissions and he commits to lowering his own.
Barbara Stocking, chief executive of Oxfam also says it's time for lifestyle change in the wealthy world, especially if we are to tackle global poverty.

Sir Crispin Tickell, former UK permanent representative to the UN and the man credited with persuading Margaret Thatcher as prime inister to acknowledge and act on global warming, calls for a World Environment Organisation to simplify and make effective the wide range of international treaties and agreements.

Many more people describe the huge opportunities for economic recovery and better lives that could come from a great transition to a low-carbon, high well-being economy, but which are currently going begging.

Change is in the air, in spite of the current official blind spot and attempt to return to business as usual, or even go "backwards" as today's joint letter of concern warns. Why, for example, do we encourage the oil industry with tax breaks, when we know that to avoid runaway climate change we can only afford to burn around a fifth of the fossil fuels left in the ground, making it unburnable?

The ideas from our 50 contributors are just a taste of the creativity and innovation available. The failure to act "appears both reckless and short sighted" they write. Yet in the government, the situation appears to be like the old joke about the shopkeeper. When a customer asks for a new product, the shopkeeper replies, "No, sorry mate, people keep asking me for that and I keep telling them, there's just no call for it."

Whether it was rebuilding Europe after the second world war, or action to protect the ozone layer, we know it is possible to put aside narrow self-interest. Leadership like that goes down in history.

What we do in the next 50 months is not a choice between what we have done in the past and what we are doing today. It is an invitation to embark on the most extraordinary, exhilarating and challenging adventure our society has yet faced, learning how to thrive without disastrously destabilising the climate on which we depend. Every step matters, and it matters most that we start walking.

Wednesday, July 25, 2012

NASA in Disbelief over Rate of Melting Ice in Greenland

(Right...man-made climate change is a myth...myth this!--jef)


'Not a Mistake': Greenland ice sheet melted at unprecedented rate during July

The Greenland ice sheet on July 8, left, and four days later on the right.
An estimated 97% of the ice sheet surface had thawed by July 12.

Scientists say there has been a freak event in Greenland this month: Nearly every part of the massive ice sheet that blankets the island suddenly started melting.

The ice melted so fast that scientists at NASA first thought it was a computer error or some other malfunction.

For several days this month, Greenland's surface ice cover melted over a larger area than at any time in more than 30 years of satellite observations, according to a statement released along with satellite images on Tuesday.

"This was so extraordinary that at first I questioned the result: was this real or was it due to a data error?" Son Nghiem of NASA's jet propulsion laboratory in Pasadena said in the release.
But after conferring with colleagues, Nghiem's disbelief turned to shock.

"I think it's fair to say that this is unprecedented," Jay Zwally, a glaciologist at NASA's Goddard Space Flight Center, told The Guardian.

On average in the summer, about half of the surface of Greenland's ice sheet naturally melts. At high elevations, most of that melt water quickly refreezes in place. Near the coast, some of the melt water is retained by the ice sheet and the rest is lost to the ocean. But this year the extent of ice melting at or near the surface jumped dramatically. According to satellite data, an estimated 97 percent of the ice sheet surface thawed at some point in mid-July.

Researchers have not yet determined whether this extensive melt event will affect the overall volume of ice loss this summer and contribute to sea level rise.

"The Greenland ice sheet is a vast area with a varied history of change. This event, combined with other natural but uncommon phenomena, such as the large calving event last week on Petermann Glacier, are part of a complex story," said Tom Wagner, NASA's cryosphere program manager in Washington. "Satellite observations are helping us understand how events like these may relate to one another as well as to the broader climate system."

Even the area around Summit Station in central Greenland, which at 2 miles above sea level is near the highest point of the ice sheet, showed signs of melting. Such pronounced melting at Summit and across the ice sheet has not occurred since 1889, according to ice cores analyzed by Kaitlin Keegan at Dartmouth College in Hanover, N.H. A National Oceanic and Atmospheric Administration weather station at Summit confirmed air temperatures hovered above or within a degree of freezing for several hours July 11-12.

"Ice cores from Summit show that melting events of this type occur about once every 150 years on average. With the last one happening in 1889, this event is right on time," says Lora Koenig, a Goddard glaciologist and a member of the research team analyzing the satellite data. "But if we continue to observe melting events like this in upcoming years, it will be worrisome."