Tuesday, October 22, 2013

Australia's bushfires inflame climate change debate

Australia's bushfires have such a long and destructive history there's almost no day of the week that hasn't been dubbed "black" or "ash" to mark a major conflagration.

There was Black Thursday in Victoria in 1851, which destroyed five million hectares and claimed 12 lives -- the first large-scale bushfire in the history of white settlement in Australia.

Since then there's been Red Tuesday in 1898 in Victoria, which consumed 2,000 buildings, Black Friday in Victoria in 1938 that killed 71 and destroyed 3,700 buildings, and Ash Wednesday in the early 1980s that left 71 dead in the state of South Australia.

Most recently in 2009, Black Saturday claimed 173 lives in the state of Victoria in southern Australia -- many of the victims unable to even get the distance of their own driveways before they succumbed to the intense radiant heat generated by a bushfire.

Many argue that Australia's catastrophic bushfires are simply a fact of life on a continent where its flora, heavy with combustible eucalyptus oil, constitute something of a seasonal time bomb.

Others say more sinister man-made factors are at work.

Changing climate

Australia has had a troubled relationship with climate change -- its confused policies on a controversial carbon tax are credited with felling the Labor Party at the last election, while the new government controversially disbanded the country's Climate Commission -- but scientists say the latest bushfire season may turn up the heat on the climate-change skeptics.

While the jury is still out on whether climate change is making conditions perfect for large-scale bushfires, scientists agree that bushfire seasons -- a regular occurrence on the Australian seasonal calendar -- are getting longer and the fires more intense.

According to David Bowman, professor of forest ecology at the University of Tasmania, who has studied bushfires for more than 30 years, bushfire behavior is showing signs of change.

"The problem with Australia is that the records are pretty shallow, which makes it really difficult to talk conclusively about any of the fire activity. But when you piece everything together there's some very convincing evidence.

No comments:

Post a Comment