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Long, hot summer of fire, floods fits predictions
Question of the Day
NEW YORK (AP) - Floods, fires, melting ice and feverish heat: From smoke-choked Moscow to water-soaked Iowa and the High Arctic, the planet seems to be having a midsummer breakdown. It’s not just a portent of things to come, scientists say, but a sign of troubling climate change already under way.
The weather-related cataclysms of July and August fit patterns predicted by climate scientists, the Geneva-based World Meteorological Organization says _ although those scientists always shy from tying individual disasters directly to global warming.
The experts now see an urgent need for better ways to forecast extreme events like Russia’s heat wave and wildfires and the record deluge devastating Pakistan. They’ll discuss such tools in meetings this month and next in Europe and America, under United Nations, U.S. and British government sponsorship.
He said modelers of climate systems are “very keen” to develop supercomputer modeling that would enable more detailed linking of cause and effect as a warming world shifts jet streams and other atmospheric currents. Those changes can wreak weather havoc.
The U.N.’s network of climate scientists _ the Intergovernmental Panel on Climate Change (IPCC) _ has long predicted that rising global temperatures would produce more frequent and intense heat waves, and more intense rainfalls. In its latest assessment, in 2007, the Nobel Prize-winning panel went beyond that. It said these trends “have already been observed,” in an increase in heat waves since 1950, for example.
Still, climatologists generally refrain from blaming warming for this drought or that flood, since so many other factors also affect the day’s weather.
Stott and NASA’s Gavin Schmidt, at the Goddard Institute of Space Studies in New York, said it’s better to think in terms of odds: Warming might double the chances for heat waves, for example. “That is exactly what’s happening,” Schmidt said, “a lot more warm extremes and less cold extremes.”
The WMO pointed out that this summer’s events fit the international scientists’ projections of “more frequent and more intense extreme weather events due to global warming.”
In fact, in key cases they’re a perfect fit:
It’s been the hottest summer ever recorded in Russia, with Moscow temperatures topping 100 degrees Fahrenheit (37.8 degrees C) for the first time. Russia’s drought has sparked hundreds of wildfires in forests and dried peat bogs, blanketing Moscow with a toxic smog that finally lifted Thursday after six days. The Russian capital’s death rate doubled to 700 people a day at one point. The drought reduced the wheat harvest by more than one-third.
The 2007 IPCC report predicted a doubling of disastrous droughts in Russia this century and cited studies foreseeing catastrophic fires during dry years. It also said Russia would suffer large crop losses.
The heaviest monsoon rains on record _ 12 inches (300 millimeters) in one 36-hour period _ have sent rivers rampaging over huge swaths of countryside, flooding thousands of villages. It has left 14 million Pakistanis homeless or otherwise affected, and killed 1,500. The government calls it the worst natural disaster in the nation’s history.
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