Saturday, February 02, 2008
60 acres lost a minute - Rain forests fall at 'alarming' rate
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From Brazil to central Africa to once-lush islands in Asia's archipelagos, human encroachment is shrinking the world's rain forests.
The alarm was sounded decades ago by environmentalists — and was little heeded. The picture, meanwhile, has changed: Africa is now a leader in destructiveness. The numbers have changed: U.N. specialists estimate 60 acres of tropical forest are felled worldwide every minute, up from 50 a generation back. And the fears have changed.
Experts still warn of extinction of animal and plant life, of the loss of forest peoples' livelihoods, of soil erosion and other damage. But scientists today worry urgently about something else: the fateful feedback link of trees and climate.
Global warming is expected to dry up and kill off vast tracts of rain forest, and dying forests will feed global warming.
"If we lose forests, we lose the fight against climate change," declared more than 300 scientists, conservation groups, religious leaders and others in an appeal for action at December's climate conference in Bali, Indonesia.
The burning or rotting of trees that comes with deforestation — at the hands of ranchers, farmers, timbermen — sends more heat-trapping carbon dioxide into the atmosphere than all the world's planes, trains, trucks and automobiles. Forest destruction accounts for about 20 percent of manmade emissions, second only to burning of fossil fuels for electricity and heat. Conversely, healthy forests absorb carbon dioxide and store carbon.
"The stakes are so dire that if we don't start turning this around in the next 10 years, the extinction crisis and the climate crisis will begin to spiral out of control," said Roman Paul Czebiniak, a forest expert with Greenpeace International. "It's a very big deal."
The December U.N. session in Bali may have been a turning point, endorsing negotiations in which nations may fashion the first global financial plan for compensating developing countries for preserving their forests.
The latest data from the Food and Agriculture Organization (FAO) helped spur delegates to action.
"Deforestation continues at an alarming rate of about 13 million hectares (32 million acres) a year," the U.N. body said in its latest "State of the World's Forests" report.
Because northern forests remain essentially stable, that means 50,000 square miles of tropical forest are being cleared every 12 months — equivalent to one Mississippi or more than half a Britain. The lumber and fuelwood removed in the tropics alone would fill more than 1,000 Empire State Buildings, FAO figures show.
Although South America loses slightly more acreage than Africa, the rate of loss is higher here — almost 1 percent of African forests gone each year. In 2000-2005, the continent lost 10 million acres a year, including big chunks of forest in Sudan, Zambia and Tanzania, up from 9 million a decade earlier, the FAO reports.
Across the tropics the causes can be starkly different.
The Amazon and other South American forests are usually burned for cattle grazing or industrial-scale soybean farming. In Indonesia and elsewhere in southeast Asia, island forests are being cut or burned to make way for giant plantations of palm, whose oil is used in food processing, cosmetics and other products.
In Africa, by contrast, it's individuals hacking out plots for small-scale farming.
Here in Nigeria's southeastern Cross Rivers State, home to one of the largest remaining tropical forests in Africa, people from surrounding villages of huts and cement-block homes go to the forest each day to work their pineapple and cocoa farms. They see no other way of earning money to feed their families.
"The developed countries want us to keep the forests, since the air we breathe is for all of us, rich countries and poor countries," said Ogar Assam Effa, 54, a tree plantation director and member of the state conservation board.
"But we breathe the air, and our bellies are empty. Can air give you protein? Can air give you carbohydrates?" he asked. "It would be easy to convince people to stop clearing the forest if there was an alternative."
The state, which long ago banned industrial logging, is trying to offer alternatives.
Working with communities like Abo Ebam, near Nigeria's border with Cameroon, the Cross Rivers government seeks to help would-be farmers learn other trades, such as beekeeping or raising fist-sized land snails, a regional delicacy.
The state also has imposed a new licensing system. Anyone who wants to cut down one of the forest's massive, valuable mahogany trees or other hardwoods must obtain a license and negotiate which tree to fell with the nearby community, which shares in the income. The logs can't be taken away whole, but must be cut into planks in the forest, by people like David Anfor.
He's a 35-year-old father of one who earns the equivalent of 75 U.S. cents per board he cuts with a whizzing chain saw. "The forest is our natural resource. We're trying to conserve," he said. "But I'm also working for my daily eating."
A community benefiting from such small-scale forestry is likely to keep out those engaged in illegal, uncontrolled logging. But enforcement is difficult in a state with about 3,500 square miles of pristine rain forest — and few forest rangers.
On one recent day deep in the forest, where the luxuriant green canopy allows only rare shards of sunlight to reach the floor, the trilling of a hornbill bird and the distant chain saw were the only sounds heard. As forestry officials rushed to investigate, the saw operator fled deeper into the forest, sign of an illegal operation.
Environmentalists say such a conservation approach may work for rural, agrarian people in Nigeria, which lost an estimated 15 million acres between 1990 and 2005, or about one-third of its entire forest area, and has one of the world's highest deforestation rates — more than 3 percent per year.
But lessons learned in one place aren't necessarily applicable elsewhere, they say. A global strategy is needed, mobilizing all rain-forest governments.
That's the goal of the post-Bali talks, looking for ways to integrate forest preservation into the world's emerging "carbon trading" system. A government earning carbon credits for "avoided deforestation" could then sell them to a European power plant, for example, to meet its emission-reduction quota.
"These forests are the greatest global public utility," Britain's conservationist Prince Charles said in the lead-up to Bali. "As a matter of urgency we have to find ways to make them more valuable alive than dead."
Observed the World Wildlife Fund's Duncan Pollard, "Suddenly you have the whole world looking at deforestation."
But in many ways rain forests are still a world of unknowns, a place with more scientific questions than answers.
How much carbon dioxide are forests absorbing? How much carbon is stored there? How might the death of the Amazon forest affect the climate in, say, the American Midwest? Hundreds of researchers are putting in thousands of hours of work to try to answer such questions before it is too late.
___ courtesy Yahoo! News:http://news.yahoo.com/s/ap/20080202/ap_on_re_af/60_acres_a_minute_i
Wednesday, December 12, 2007
Ominous Arctic Melt Worries Experts - Dooms Day is here... Sooner than expected... Is this theh POINT OF NO RETURN???
Ominous Arctic Melt Worries Experts
By SETH BORENSTEINAP Science Writer
AP Photo/JOHN MCCONNICO
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Ominous Arctic Melt Worries Experts
WASHINGTON (AP) -- An already relentless melting of the Arctic greatly accelerated this summer, a warning sign that some scientists worry could mean global warming has passed an ominous tipping point. One even speculated that summer sea ice would be gone in five years.
Greenland's ice sheet melted nearly 19 billion tons more than the previous high mark, and the volume of Arctic sea ice at summer's end was half what it was just four years earlier, according to new NASA satellite data obtained by The Associated Press.
"The Arctic is screaming," said Mark Serreze, senior scientist at the government's snow and ice data center in Boulder, Colo.
Just last year, two top scientists surprised their colleagues by projecting that the Arctic sea ice was melting so rapidly that it could disappear entirely by the summer of 2040.
This week, after reviewing his own new data, NASA climate scientist Jay Zwally said: "At this rate, the Arctic Ocean could be nearly ice-free at the end of summer by 2012, much faster than previous predictions."
So scientists in recent days have been asking themselves these questions: Was the record melt seen all over the Arctic in 2007 a blip amid relentless and steady warming? Or has everything sped up to a new climate cycle that goes beyond the worst case scenarios presented by computer models?
"The Arctic is often cited as the canary in the coal mine for climate warming," said Zwally, who as a teenager hauled coal. "Now as a sign of climate warming, the canary has died. It is time to start getting out of the coal mines."
It is the burning of coal, oil and other fossil fuels that produces carbon dioxide and other greenhouse gases, responsible for man-made global warming. For the past several days, government diplomats have been debating in Bali, Indonesia, the outlines of a new climate treaty calling for tougher limits on these gases.
What happens in the Arctic has implications for the rest of the world. Faster melting there means eventual sea level rise and more immediate changes in winter weather because of less sea ice.
In the United States, a weakened Arctic blast moving south to collide with moist air from the Gulf of Mexico can mean less rain and snow in some areas, including the drought-stricken Southeast, said Michael MacCracken, a former federal climate scientist who now heads the nonprofit Climate Institute. Some regions, like Colorado, would likely get extra rain or snow.
More than 18 scientists told the AP that they were surprised by the level of ice melt this year.
"I don't pay much attention to one year ... but this year the change is so big, particularly in the Arctic sea ice, that you've got to stop and say, 'What is going on here?' You can't look away from what's happening here," said Waleed Abdalati, NASA's chief of cyrospheric sciences. "This is going to be a watershed year."
2007 shattered records for Arctic melt in the following ways:
- 552 billion tons of ice melted this summer from the Greenland ice sheet, according to preliminary satellite data to be released by NASA Wednesday. That's 15 percent more than the annual average summer melt, beating 2005's record.
- A record amount of surface ice was lost over Greenland this year, 12 percent more than the previous worst year, 2005, according to data the University of Colorado released Monday. That's nearly quadruple the amount that melted just 15 years ago. It's an amount of water that could cover Washington, D.C., a half-mile deep, researchers calculated.
- The surface area of summer sea ice floating in the Arctic Ocean this summer was nearly 23 percent below the previous record. The dwindling sea ice already has affected wildlife, with 6,000 walruses coming ashore in northwest Alaska in October for the first time in recorded history. Another first: the Northwest Passage was open to navigation.
- Still to be released is NASA data showing the remaining Arctic sea ice to be unusually thin, another record. That makes it more likely to melt in future summers. Combining the shrinking area covered by sea ice with the new thinness of the remaining ice, scientists calculate that the overall volume of ice is half of 2004's total.
- Alaska's frozen permafrost is warming, not quite thawing yet. But temperature measurements 66 feet deep in the frozen soil rose nearly four-tenths of a degree from 2006 to 2007, according to measurements from the University of Alaska. While that may not sound like much, "it's very significant," said University of Alaska professor Vladimir Romanovsky.
- Surface temperatures in the Arctic Ocean this summer were the highest in 77 years of record-keeping, with some places 8 degrees Fahrenheit above normal, according to research to be released Wednesday by University of Washington's Michael Steele.
Greenland, in particular, is a significant bellwether. Most of its surface is covered by ice. If it completely melted - something key scientists think would likely take centuries, not decades - it could add more than 22 feet to the world's sea level.
However, for nearly the past 30 years, the data pattern of its ice sheet melt has zigzagged. A bad year, like 2005, would be followed by a couple of lesser years.
According to that pattern, 2007 shouldn't have been a major melt year, but it was, said Konrad Steffen, of the University of Colorado, which gathered the latest data.
"I'm quite concerned," he said. "Now I look at 2008. Will it be even warmer than the past year?"
Other new data, from a NASA satellite, measures ice volume. NASA geophysicist Scott Luthcke, reviewing it and other Greenland numbers, concluded: "We are quite likely entering a new regime."
Melting of sea ice and Greenland's ice sheets also alarms scientists because they become part of a troubling spiral.
White sea ice reflects about 80 percent of the sun's heat off Earth, NASA's Zwally said. When there is no sea ice, about 90 percent of the heat goes into the ocean which then warms everything else up. Warmer oceans then lead to more melting.
"That feedback is the key to why the models predict that the Arctic warming is going to be faster," Zwally said. "It's getting even worse than the models predicted."
NASA scientist James Hansen, the lone-wolf researcher often called the godfather of global warming, on Thursday was to tell scientists and others at the American Geophysical Union scientific in San Francisco that in some ways Earth has hit one of his so-called tipping points, based on Greenland melt data.
"We have passed that and some other tipping points in the way that I will define them," Hansen said in an e-mail. "We have not passed a point of no return. We can still roll things back in time - but it is going to require a quick turn in direction."
Last year, Cecilia Bitz at the University of Washington and Marika Holland at the National Center for Atmospheric Research in Colorado startled their colleagues when they predicted an Arctic free of sea ice in just a few decades. Both say they are surprised by the dramatic melt of 2007.
Bitz, unlike others at NASA, believes that "next year we'll be back to normal, but we'll be seeing big anomalies again, occurring more frequently in the future." And that normal, she said, is still a "relentless decline" in ice.
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On the Net:
National Snow and Ice Data Center on 2007 Arctic sea ice:
http://nsidc.org/news/press/2007-seaiceminimum/20070810-index.html
NASA's "Tipping Points" panel and slide show materials:
http://www.nasa.gov/topics/earth/tipping-points.html
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Source: WIRED.COM - CondéNet, Inc
Thursday, November 29, 2007
Global Warming will push India into reverse, as global leadership fades says new report
New Delhi, India — Biggest study yet from a unique coalition of major development and environment groups reveals scale of climate impacts in India - immediate action needed before India goes ' Up in Smoke'
New Delhi 19th November 2007: A new report – Up in Smoke? Asia and the Pacific – with a foreword by Dr R.K. Pachauri, Chairman of the Nobel prize-winning Intergovernmental Panel on Climate Change – says that without immediate action, global warming is set to reverse decades of social and economic progress across Asia, home to over 60 per cent of the world's population. The report is published in the wake of evidence that a majority of Industrialised countries are reneging on targets for emissions reductions set to tackle climate change.
As world leaders prepare for the next UN talks to determine the international response to climate change, in Bali at the beginning of December, Up in Smoke: Asia and the Pacific, shows how the human drama of climate change will largely be played out in Asia, where almost two thirds of the world's population live, effectively on the front line of climate change.
"While going through the foreword that I wrote for the 2004 volume of "Up in smoke", I find that the concerns and priorities that I had touched on as part of that write-up, if anything, have become stronger, and the uncertainties associated with what I had stated then have been reduced significantly. The IPCC findings provide the evidence for the same." Dr RK Pachauri, Director General, The Energy and Resources Institute and Chairman, IPCC.
India is large country with close to 700 million people living in rural areas who depend on climate sensitive sectors such as agriculture, forests, and fisheries for their livelihoods. Its ecosystems such as riversheds, mangroves, coastal zones, forests and grasslands are already overburdened by environmental pressures from commercialization , excessive resource use and indiscriminate dumping of industrial and agricultural waste.
The report highlights the potential devastating impacts of climate change in India, for example, that:
India has already 250 million people that live in absolute poverty with little capacity to cope with climate change. 400 million people living in the Ganga Basin will be further affected by water shortages in the near future. Many more will be affected by floods and droughts due to erratic monsoons and the fast depletion of Himalayan glaciers.
Around 600 million Indians depend on agriculture, which, unlike the rest of the economy, has been crawling along at a growth rate of less than 2% per annum. Production has been stagnant, per capita availability of food is declining, farmer suicides and hunger deaths are on the rise, and agrarian distress is acute and widespread. These trends will be further accentuated due to climate change.
Some vulnerable sections of society like women, tribal communities, scheduled castes will bear the brunt of the impacts of climate change. Women, for example, will spend a greater and greater amount of their time in arranging for food, fuel and water for their families.
In the Sundarbans, already four islands have been completely submerged, displacing about 6,000 families. These families have the misfortune of being India's foremost Climate Refugees.
There is growing consensus about the current human and environmental challenges facing Asia, and what is needed to tackle them. There is already enough knowledge and understanding to know what the main causes of climate change are, how to reduce future climate change, and how to begin to adapt.
Alongside new evidence of the devastating impact that climate change is already having on communities across Asia, Up in Smoke Asia and the Pacific, shows positive measures that are already being taken – by governments, by civil society and by local people – to reduce the causes of climate change and to overcome its effects. It shows examples of emissions reduction; alternative water and energy supply systems; preservation of strategic ecosystems and protected areas; increasing capacity, awareness and skills for risk and disaster management; and the employment of effective regulatory and policy instruments. The challenge is clear and many of the solutions are known: the point is, to act.
Immediate decisions needs to be made on the following:
1) Appropriate policy and fiscal measures for dealing with the immediate future impacts of climate change
2) Move towards sustainable, low carbon intensity energy pathways, while not compromising on development goals
3) Planned adaptation measures in climate sensitive sectors, especially water and agriculture
4) Disaster risk reduction and disaster preparedness in vulnerable areas.
Source:http://www.greenpeace.org/india/press/releases/global-warming-will-push-india