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Climate scientists too worried about bushfires

[ 2009-02-27 14:40]     字号 [] [] []  
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Bushfires that have scorched Australia's Victoria state released millions of tons of carbon dioxide and forest fires could become a growing source of carbon pollution as the planet warms, a top scientist said yesterday.

Mark Adams of the University of Sydney said global warming could trigger a vicious cycle in which forests could stop becoming sinks of CO2, further accelerating the rise of the planet-warming gas in the atmosphere.

"With increasing concerns about rising CO2, rising temperatures and reduced rainfall in many of the forested areas, then we could well see much greater emissions from forest fires," Adams, dean of the Faculty of Agriculture, Food and Natural Resources, said.

The Victoria fires, which killed more than 200 people, were the worst in the nation's history and many are still burning.

"Scientists worldwide are worried about fires and forests. It doesn't matter if it's the Arctic tundra fires, or peat fires in Kalimantan or bushfires in Australia," said Adams, who has worked in collaboration with the Bushfire Co-operative Research Centre.

In a submission to the United Nations last year, the Australian government said wildfires in 2003 released 190 million tons of CO2-equivalent, roughly a third of the nation's total greenhouse gas emissions for the year.

Such large, one-off releases of CO2 and other greenhouse gases such as methane, are not presently accounted for in Australia's annual list of national greenhouse gas emissions.

If they were, the country would vastly exceed its emission limits under the Kyoto Protocol, the United Nations' main weapon to fight climate change.

Which is why Australia is calling for amendments to rules on land use change under the UN so that only human activities that "can be practicably influenced" are included.

Adams said UN climate talks at the end of the year in Denmark that aim to agree on a successor pact to Kyoto, should discuss the growing threat from forest fires and how to develop better legal frameworks to tackle the problem.

Australia, though, was not the only concern.

Annual fires in Indonesia also released vast amounts of CO2. Huge fires in 1997 released up to 6 billion tonnes of CO2, covering Southeast Asia in thick haze and causing a spike in global levels of the gas.

Research on the forest and peat fires by a team of international scientists found the blazes released the equivalent of up 40 percent of global annual emissions from burning fossil fuels.

Adams said the research was a wake-up call.

"When you see the step-increases (of CO2) that they observed, we have to sit up and take notice, that fires are a major problem," said Adams.

(英语点津 Helen 编辑)

Climate scientists too worried about bushfires

Climate scientists too worried about bushfiresBrendan joined The China Daily in 2007 as a language polisher in the Language Tips Department, where he writes a regular column for Chinese English Language learners, reads audio news for listeners and anchors the weekly video news in addition to assisting with on location stories. Elsewhere he writes Op’Ed pieces with a China focus that feature in the Daily’s Website opinion section.

He received his B.A. and Post Grad Dip from Curtin University in 1997 and his Masters in Community Development and Management from Charles Darwin University in 2003. He has taught in Japan, England, Australia and most recently China. His articles have featured in the Bangkok Post, The Taipei Times, The Asia News Network and in-flight magazines.

 
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