The Arctic Paradox Poses Questions about Sustainable Development – Guest Blog by Christine Russell – Scientific American Blog Network

Call it a contradiction of glacial proportions—an Arctic paradox. The world pushes for stronger protective measures to curb climate change scientists say is accelerating the destruction of the Arctic—melting ice sheets, thawing frozen soil and threatening the iconic polar bear.  Call it plan A. There is a contingency plan, however, that takes advantage of new Arctic opportunities—in shipping, mining, drilling and national security—if the big melt continues apace. Call it plan B.

Source: The Arctic Paradox Poses Questions about Sustainable Development – Guest Blog – Scientific American Blog Network

World Is Locked into About 1.5°C Warming & Risks Are Rising, New Climate Report Finds

In the Andes of South America and across the mountains of Central Asia, the glaciers are receding. As temperatures continue to warm, their melting will bring more water to farms and cities earlier in the growing season, raising the risk of damaging floods. Within a few decades, however, the risk of flood in these areas will become risk of drought. Without action to stop the drivers of climate change, most of the Andean glaciers and two-thirds of Central Asia’s glaciers could be gone by the end of the century.These changes are already underway, with global temperatures 0.8 degrees Celsius above pre-industrial times, and the impact on food security, water supplies and livelihoods is just beginning.A new report explores the impact of climate change in Latin America and the Caribbean, the Middle East and North Africa, and Eastern Europe and Central Asia and finds that warming of close to 1.5°C above pre-industrial times is already locked into Earth’s atmospheric system by past and predicted greenhouse gas emissions. Without concerted action to reduce emissions, the planet is on pace for 2°C warming by mid-century and 4°C or more by the time today’s teenagers are in their 80s.The report warns that as temperatures rise, heat extremes on par with the heat waves in the United States in 2012 and Russia in 2010 will become more common. Melting permafrost will release methane, a powerful greenhouse gas that will drive more warming in a dangerous feedback loop. Forests, including the Amazon, are also at risk. A world even 1.5°C will mean more severe droughts and global sea level rise, increasing the risk of damage from storm surges and crop loss and raising the cost of adaptation for millions of people.

Source: World Is Locked into About 1.5°C Warming & Risks Are Rising, New Climate Report Finds

Scientists may have cracked the giant Siberian crater mystery — and the news isn’t good – The Washington Post

There’s now a substantiated theory about what created the crater. And the news isn’t so good.It may be methane gas, released by the thawing of frozen ground. According to a recent Nature article, “air near the bottom of the crater contained unusually high concentrations of methane — up to 9.6% — in tests conducted at the site on 16 July, says Andrei Plekhanov, an archaeologist at the Scientific Centre of Arctic Studies in Salekhard, Russia. Plekhanov, who led an expedition to the crater, says that air normally contains just 0.000179% methane.”The scientist said the methane release may be related to Yamal’s unusually hot summers in 2012 and 2013, which were warmer by an average of 5 degrees Celsius. “As temperatures rose, the researchers suggest, permafrost thawed and collapsed, releasing methane that had been trapped in the icy ground,” the report stated.

via Scientists may have cracked the giant Siberian crater mystery — and the news isn’t good – The Washington Post.