A record loss of sea ice in the Arctic summer 2005 has convinced scientists that the northern hemisphere may have crossed a critical threshold beyond which the climate may never recover.
Scientists fear that the Arctic has now entered an irreversible phase of warming which will accelerate the loss of the polar sea ice that has helped to keep the climate stable for thousands of years. Dr Serreze: "This will be four Septembers in a row that we've seen a downward trend. The feeling is we are reaching a tipping point or threshold beyond which sea ice will not recover." Professor Wadhams: "As the sea ice melts, and more of the sun's energy is absorbed by the exposed ocean, a positive feedback is created leading to the loss of yet more ice." "If anything we may be underestimating the dangers. The computer models may not take into account collaborative positive feedback." "Sea ice keeps a cap on frigid water, keeping it cold and protecting it from heating up." "Losing the sea ice of the Arctic is likely to have major repercussions for the climate." "There could be dramatic changes to the climate of the northern region due to the creation of a vast expanse of open water where there was once effectively land." "You're essentially changing land into ocean and the creation of a huge area of open ocean where there was once land will have a very big impact on other climate parameters." |
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| Saturday, 15 October 2005 Amazon drought emergency widens
Brazil's military has been distributing supplies and medicine to tens of thousands of people stranded by the dramatic drop in water levels. Witnesses say rivers and lakes have dried up completely, leaving behind kilometres of sand and mud. Environmental campaign group Greenpeace has blamed deforestation and global warming for the drought. It quoted scientists as saying that the burning of forests has raised temperatures in the Amazon, preventing the formation of clouds. Brazilian government meteorologists, however, have said the drought is the result of unusually high temperatures in the Atlantic Ocean, that have also been linked to this year's devastating hurricanes. Airlift lifeline A state of emergency has been declared in all 61 municipalities of Brazil's Amazonas state as the drought has started affecting towns and cities further downstream, reports the BBC's Tom Gibb in Sao Paolo. Brazil's armed forces have been delivering water, food and medical supplies to communities isolated by the worst drought in the Amazon for decades. The air force has been distributing water-purifying chemicals to counter the threat of disease from water supplies contaminated by dead fish in the Amazon. Low river levels are preventing boats — for many the only means of transport — from using the Amazon safely, leaving communities depending on government airlifts for their survival. Big ships have been left stranded in the world's second-largest river and millions of fish are rotting in the sun, witnesses say. |
| Thursday, 22 September 2005 Fires rage in Brazil's rainforest
Thousands of hectares of the world's largest rainforest have already been destroyed by the blazes. Acre's Governor Jorge Viana urged the federal government in Brasilia to act swiftly, expressing particular concerns about pollution caused by the smoke. Hundreds of soldiers, rescuers and also local residents are battling the fires. Correspondents say it is not known what caused the blazes, some of which broke out nearly two weeks ago. Some 500 people have been evacuated from the area, officials said earlier this week. In the past, authorities have blamed farmers who burned forested areas in the dry season to make space for their crops. The blazes have often raged out of control in recent years. |
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Extreme drought in the Amazon rainforest linked to deforestation and climate changeMANAQUIRI, Brazil — The devastating drought currently affecting the Amazon rainforest is part of a vicious cycle created by the combined affects of global warming and deforestation and could cause the collapse of the rainforest, according to scientists from the Large Scale Biosphere-Atmosphere Experiment in Amazonia and Greenpeace. "Brazil is one of the most vulnerable countries to climate changes in the world because of its invaluable biodiversity. If the Amazon loses more than 40% of its forest cover, we will reach a turning point from where we cannot reverse the savannization process of the world's largest forest," said Carlos Nobre, from the Brazilian National Institute for Space Research (INPE) and President of the International Geosphere Biosphere Program (IGBP). Seventeen per cent of the Amazon has been completely wiped out over the past 30 years, according to INPE, and even more has been damaged by destructive and illegal logging and other human activities. Life on Earth depends on ancient forests for its survival. They are the richest most diverse habitats, and help stabilize climate and regulate the weather. "This drought and its effects are really shocking. Towns are lacking food, medicines and fuel because boats cannot get through," said Carlos Rittl, Greenpeace Brazil's climate campaigner. "If the landscape I've seen this week is a sign of things to come, we're in serious trouble. We risk losing the world's largest rainforest, the network of rivers and invaluable and varied life it sustains, much of which we haven't even discovered or researched." Amazonian deforestation and fires account for more than 75% of Brazil's greenhouse gas emissions and place it amongst the top four contributors to global climate change. "The Amazon is caught between two destructive forces and their combined effects threaten to flip its ecosystems from forest to savannah if measures are not taken to stop deforestation and combat climate change," said Rittl. Greenpeace is calling on governments to take urgent action to stop deforestation and commit to the massive CO2 reductions needed to protect the Earth's biodiversity and millions of people who are at risk from the impacts of climate change and ancient forest destruction. Greenpeace has been gathering dramatic images of the worst drought in 40 years in the Amazon this week. The Amazon River basin is at its lowest level in decades. Floodplains have dried up and people are walking and using bicycles on areas in which canoes and riverboats used to be the only means of transport. Large boats have become stuck in the dry mud and the landscape is covered with thousands of rotting dead fish, which are attracting dozens of vultures. In the Amazon: Carlos Rittl, Greenpeace Brazil October 18, 2005
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In 2001, for example, IBAMA (the Brazilian Environmental Agency) issued authorisation documents for deforestation of 5,342 hectares, but the total deforestation showed by satellite images from INPE (the Brazilian Institute of Space Research) reveals that 523,700 hectares were deforested.
In other words, in 2001 just 1% of the total deforestation area was authorized. Previous years' data is similar. |
| Friday, 30 August, 2002 Clock ticking for Indonesian rainforest
By Richard GalpinBBC correspondent in Jakarta The Indonesian island of Sumatra is the sixth largest island in the world and once boasted some of the most extensive and richest areas of tropical rainforest anywhere on the planet — but no longer. It is estimated 60% of the total forest cover has been destroyed over the past 100 years, with the rate of destruction increasing rapidly in the 1970s and 80s under the authoritarian regime of former President Suharto. His government was particularly keen on dividing up vast areas of the country's forests into concessions given to powerful businessmen to log and convert into rubber and palm-oil plantations.
This along with the resettlement of millions of people from over-crowded Java to islands such as Sumatra and Borneo, all of whom needed land to farm, saw deforestation reach unprecedented levels. Today it is estimated around two million hectares (five million acres) of Indonesian forest are lost every year — an area equivalent to the size of Belgium. And the majority of the logging is believed to be illegal. Race against time In Sumatra environmentalists are now fighting a desperate battle to save the last substantial part of the lowland forest still standing.
The forest in Riau province is called Tesso Nilo and organisations such as the Worldwide Fund for Nature (WWF) believe it is critical it is turned into a special conservation area. "This lowland forest is the prime habitat of the Sumatran tiger, elephants and other important species," said Nazir Foead of WWF Indonesia. "If Tesso Nilo forest goes, then the chances of survival for these endangered species will be very, very slim." Unparalleled diversity On top of this, recent research commissioned by WWF discovered that Tesso Nilo has the highest level of biodiversity on earth. Scientists found more than 200 vascular plant species in just 200 square metres of forest — far more even than in the Amazon.
But time is fast running out for the world's richest forest which presently occupies an area of just 1,500 square kilometres (579 square miles). If the current rate of logging continues, it will have disappeared within the next four years. Driving into the area it is easy to see why. A major road has been built through the forest making it easy to access the timber. Every few minutes lorries laden with logs groan along the road belching diesel fumes into the atmosphere. "Every day up to 350 lorries have been travelling along this road," said one WWF official who has been monitoring the logging here. "I believe 100 of them contain illegal logs from Tesso Nilo." Easy money We drove further into the forest and soon could hear the sound of chainsaws in the distance. The illegal loggers are a mixture of local villagers and gangs of people who have come from further afield, generally from other provinces in Sumatra. What they have in common is poverty. The case of Kamarudin, a local villager, is typical. We followed him as he slashed his way deep into the forest, with his chainsaw balanced on his shoulder.
It did not take him long to find what he wanted — a large tropical hardwood tree called Meranti. The tree, which took decades to grow, came crashing to the ground within a couple of minutes. "Chopping down trees like this hardwood Meranti, I can earn $60 a week," he said. "Much more than the rubber plantation where I used to work where the money wasn't enough to feed my family." Local anger We went back to Kamarudin's village in the middle of the forest — a desperately poor area. More and more villagers have been turning to illegal logging over the last five years since the Asian economic crisis hit Indonesia. According to the village head, Mohammed Hatta, it will not be long before more than half the families here are involved in chopping down wood.
Mr Hatta is actively encouraging this because he believes his people have the right to do so, as he says the land is theirs. Such a direct challenge to the authorities would have been unthinkable under the repressive regime of former President Suharto. But since the advent of democracy in 1998 local communities have been asserting themselves much more. Mr Hatta is angry that over the years the government has given the rights to the whole of Tesso Nilo forest to several logging and plantation companies. "I will not ask my people to stop the logging," he said, "I will tell them to carry on, as long as these companies are getting our wood, then why should we stop?" Massive operation The scale of the main forestry industries in the area is breath-taking. We visited the Riau Andalan Pulp and Paper company (RAPP) on the outskirts of the forest, one of two such businesses based in the province. It is a huge, hi-tech industrial complex housing the world's largest pulp mill. It produces almost two million tons of pulp every year, consuming eight million tons of wood in the process. It is a non-stop operation. The mill operates 24-hours a day, with a never-ending convoy of trucks arriving at the factory to supply the wood. Back in 1993 the government gave RAAP a concession of around 3,000 sq km which it could log and then re-plant with acacia trees. Part of this concession lies within the Tesso Nilo forest itself. No guarantees A spokesman for the company told the BBC the forest it was given to convert to acacia plantations was already degraded — in other words had already been substantially logged. But WWF says this is wrong, "RAPP is chopping down primary rain-forest," said Mr Foead. The company is trying to promote itself as environment-friendly because it says within six years it will have planted enough acacia trees to provide a sustainable source of wood for the pulp mill. Ironically it can only do this by first destroying swathes of Sumatran rain-forest. Environmentalists also believe illegal logs from Tesso Nilo are being sold to RAPP. The capacity of the mill is so huge that around one-fifth of the wood supply is provided by outside contractors. The company says there are stringent checks on the sources of logs provided by these contractors, but admits it cannot guarantee all the wood is legal. WWF remains optimistic it can save Tesso Nilo from the loggers by persuading the government to turn it into a national park. But it will be an uphill struggle. Indonesia's Forestry Minister Mohammad Prakosa told the BBC he could not simply revoke the licences given to the companies which had been given the right to log the area. And even if Tesso Nilo did become a national park, it would still not be safe from the illegal loggers. The experience in Indonesia's other national parks has been that illegal logging has continued unabated as law enforcement across the country is so weak, not least because the police and other officials are notoriously corrupt. |
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Tomsk State University — 11 August, 2005 — researcher Sergei Kirpotin
All happened in the last three or four years The huge expanse of western Siberia is thawing for the first time since its formation, 11,000 years ago. This could potentially act as a tipping point, causing global warming to snowball, scientists fear. More than 90% of the original national forest cover has now been lost. The situation is an "ecological landslide that is probably irreversible and is undoubtedly connected to climatic warming," researcher Sergei Kirpotin, of Tomsk State University, Russia, told New Scientist magazine. The whole western Siberian sub-Arctic region has started to thaw, he added, and this "has all happened in the last three or four years". Siberia, Alaska Dramatic permafrost melt — click here |
| Friday, 23 August, 2002 Indonesia risks losing rain forests
They warn that rain forests in countries such as Indonesia and Brazil could disappear within 20 years. Illegal logging is a particular problem in Indonesia, according to Marco Tacconi, an economist at the Centre for International Forestry Research. He blamed illegal logging primarily not on poverty, but corruption. It is estimated that two-thirds of all logging in Indonesia is illegal. Mr Tacconi maintained that people who lived in the forests did not have the financial resources to carryout such an activity.
Laws flouted There are laws against illegal logging but they have little impact. While the government has introduced curbs on exports, these are believed to have had little effect because much of the timber illegally collected is used domestically. Mr Tacconi has never heard of anyone being jailed following the prosecution of people caught transporting or exporting logs. "Everybody knows that the law enforcement is very weak," he said. The Indonesian government's senior economic policy adviser, Mahendra Singer, admitted the legal process to prosecute the illegal loggers needed to improve. "I'm not trying to give an excuse," he told the BBC's World Business Report. "We have to understand the experience as well as the constraints and limitations that the present legal system can do." He admitted that the government was only just beginning to pass laws which deterred illegal logging.
See also: 23 Aug 02 | Business 25 Jun 02 | Asia-Pacific 22 May 02 | Asia-Pacific 10 Mar 00 | Science/Nature Internet links: The BBC is not responsible for the content of external internet sites |
Scientists find 'smallest fish' BBC science correspondent Mature individuals of the Paedocypris genus can be as small as 7.9mm (0.3in) long, researchers write in a journal published by the UK's Royal Society. But they warn long-term prospects for the fish are poor, because of the rapid destruction of Indonesian peat swamps. The fish have taken extreme measures to survive in extreme habitats - pools of acid water in a tropical forest swamp. Food is scarce but the Paedocypris - smaller than other fish by a few tenths of a millimetre - can sustain their small bodies grazing on plankton near the bottom of the water. Human threat To keep their size down, the fish have abandoned many of the attributes of adulthood - a characteristic hinted at in their name. Their brain, for example, lacks bony protection and the females have room to carry just a handful of eggs. The males have a little clasp underneath that might help them fertilize eggs individually. Being so small, the fish can live through even extreme drought, by seeking refuge in the last puddles of the swamp. But they are now threatened by humans. Widespread forest destruction, drainage of the peat swamps for palm oil plantations and persistent fires are destroying their habitat. Science may have discovered Paedocypris just in time - but many of their miniature relatives may already have been wiped out. |
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