The Eco News Roundup brings stories and commentary about issues related to climate change, renewable energy and the environment.
An immense river that flowed from one of Canada’s largest glaciers vanished over the course of four days last year, scientists have reported, in an unsettling illustration of how global warming dramatically changes the world’s geography.
The abrupt and unexpected disappearance of the Slims river, which spanned up to 150 metres at its widest points, is the first observed case of “river piracy”, in which the flow of one river is suddenly diverted into another.
Friday was Britain’s first ever working day without coal power since the Industrial Revolution, according to the National Grid.
The control room tweeted the milestone on Friday. It is the first continuous 24-hour coal-free period for Britain since use of the fossil fuel began. West Burton 1 power station, the only coal-fired plant that had been up and running, went offline on Thursday.
Greenland ice is a great analogy for the Earth’s climate. It has inertia, meaning it acts slowly but once it gets going, it’s hard to stop. When the Greenland ice sheet starts to go, it may take a while to melt but it is nearly impossible to stop. Predicting how fast this melt will take is interesting from a scientific vantage point but there are also enormous social and economic consequences. Right now, 150 million people live within a meter (3 feet) of today’s sea level.
Greenland by itself has enough ice to cause many meters of sea level rise. If you live near the coast, the question of “when” is really important. This paper suggests that “when” may be sooner than we hoped.
Within them sits some 80,000 years of history, offering researchers tantalising clues about climate change and the Earth’s past. At least that was the case – until the precious cache of Arctic ice cores was hit by warming temperatures.
A freezer malfunction at the University of Alberta in Edmonton has melted part of the world’s largest collection of ice cores from the Canadian Arctic, reducing some of the ancient ice into puddles.
A new study published in Nature Communications looks at changes in solar activity and carbon dioxide levels over the past 420 million years. The authors found that on our current path, by mid-century humans will be causing the fastest climate change in approximately 50 million years, and if we burn all available fossil fuels, we’ll cause the fastest change in the entire 420 million year record.
Scientists poring over military and satellite imagery have mapped the unimaginable: a network of rivers, streams, ponds, lakes and even a waterfall, flowing over the ice shelf of a continent with an annual mean temperature of more than -50C.
U.S. scientists report in the journal Nature that they studied photographs taken by military aircraft from 1947 and satellite images from 1973 to identify almost 700 seasonal networks of ponds, channels and braided streams flowing from all sides of the continent, as close as 600km to the South Pole and at altitudes of 1,300 meters.
And they found that such systems carried water for 120km. A second research team reporting a companion study in the same issue of Nature identified one meltwater system with an ocean outflow that ended in a 130-meter wide waterfall, big enough to drain the entire surface melt in a matter of days.
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