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Natural Sciences & Environment Dedicated to the study of our natural world. Discuss physical and life sciences, environmental and nature conservation.

Swiss Study: Snow to Largely Disappear from Alps by 2100

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Old Sunday, March 19th, 2017   #1
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Swiss Study: Snow to Largely Disappear from Alps by 2100

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By the end of the century up to 70 percent of snow cover in the Alps will have melted and the ski season will be much shorter, Swiss researchers predict.
If global warming is not halted, only ski areas above 2,500 metres will have enough snow for winter sports, said the scientists from the Institute for Snow and Avalanche Research (SLF) and the EPFL Lausanne.

Writing in European Geosciences Union (EGU) journal The Cryosphere, they predicted that the amount and duration of snow cover in typical Alpine areas would have shrunk by the end of the century, even in best-case climate scenarios.

"Bare Alpine slopes could be a much more common sight in the future," the EGU said in a statement.

The duration of the ski season will shorten too, the study found. As temperatures rise, the period when natural snow is deep enough for winter sport could start up to a month later than it does today.

And the ski area will shift.

"If we don't cut emissions, enough snow for winter sports can only be guaranteed above 2,500 metres,” said the statement.

Most climate models predict increased winter precipitation due to global warming, but with temperatures rising too, this is likely to be in the form of rain rather than snow, it said.

Boosted by long-awaited snowfall in January, parts of the Alps, currently hosting the World Ski Championships, are finally white.

But the Swiss side of the mountain range had its driest December since record-keeping began over 150 years ago, said the EGU. 2016 was the third year in a row with scarce Christmas snow.

If humankind succeeds in limiting average global warming to two degrees Celsius over pre-industrial levels, the loss of snow cover would be 30 percent by 2100, the study found.

But if nothing is done, the figure grows to 70 percent.

"The fact that we lose 30 percent of Alpine snow cover with the 2 degrees Celsius global warming scenario is sad, but at the same time encouraging compared to the 70 percent," said study co-author Christoph Marty of the SLF.

The 2 degrees Celsius goal is the mainstay of the Paris Agreement to curb warming by limiting emissions of planet-warming greenhouse gases from burning coal, oil and gas.

The team used weather data and different warming scenarios to simulate snow cover projections.

They found that snow would decline in all scenarios.

"The Alpine snow cover will recede anyway, but our future emissions control by how much," warned Marty.
https://www.thelocal.ch/20170217/swi...m-alps-by-2100
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Old Sunday, March 19th, 2017   #2
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Isn't there a small ice-age supposed to be coming in around 2030? These climate-paranoia people are funny. It's disturbing, though, that many people readily buy all that self-contradicting crap.
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