Tag Archives: Arctic

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22 October 2015, Science Daily, Measuring the impacts of severe wildfires in the Arctic. Based on the number of acres burned, 2015 is shaping up to be the second most extreme fire year during the past decade in North America’s boreal region. Historically, the area has had one or fewer extreme fire years per decade. This season, 15 million acres burned in Alaska and Canada, according Northern Arizona University’s Michelle Mack, researcher and biological sciences professor, who is leading a NASA-funded project to measure the severe fire impacts in North America. “In the boreal region, there is a thick organic layer on the surface comprised of litter and soil, that in some cases is hundreds to thousands of years old,” Mack said. “Will more fires and hotter fires burn that layer and release it to the atmosphere and how deep will it burn into the soil?” These questions are part of NASA’s $100 million dollar, 10 year project called Arctic Boreal Vulnerability Experiment, also known as ABoVE. The experiment seeks to understand the vulnerability and resilience in the Arctic, where climate change is most pronounced and rapidly unfolding. Mack serves on the project’s international science team tasked with implementing the field campaign. Read More here

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Atlantic cold patch12 October 2015, Washington Post, Why the Earth’s past has scientists so worried about the Atlantic Ocean’s circulation. In the last month, there’s been much attention to a cool patch in the North Atlantic Ocean, where record cold temperatures over the past eight months present a stark contrast to a globe that is experiencing record warmth. And although there is certainly no consensus on the matter yet, some scientists think this pattern may be a sign of one long-feared consequence of climate change — a slowing of North Atlantic ocean circulation, due to a freshening of surface waters. The cause, goes the thinking, would be the rapidly melting Greenland ice sheet, whose large freshwater flows may weaken ocean “overturning” by reducing the density of cold surface waters (colder, salty water is denser). If cold, salty waters don’t sink in the North Atlantic and flow back southward toward Antarctica at depth, then warm surface waters won’t flow northward to take their place. The result could be a significant change to northern hemisphere climate, as less ocean-borne heat reaches higher latitudes. Read More here

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28 September 2015, The Guardian, Shell abandons Alaska Arctic drilling. Oil giant’s US president says hugely controversial drilling operations off Alaska will stop for ‘foreseeable future’ as drilling finds little oil and gas. Shell has abandoned its controversial drilling operations in the Alaskan Arctic in the face of mounting opposition. Its decision, which has been welcomed by environmental campaigners, follows disappointing results from an exploratory well drilled 80 miles off Alaska’s north-west coast. Shell said it had found oil and gas but not in sufficient quantities. The move is a major climbdown for the Anglo-Dutch group which had talked up the prospects of oil and gas in the region. Shell has spent about $7bn (£4.6bn) onArctic offshore development in the hope there would be deposits worth pursuing, but now says operations are being ended for the “foreseeable future.” Shell is expected to take a hit of around $4.1bn as a result of the decision. The company has come under increasing pressure from shareholders worried about the plunging share price and the costs of what has so far been a futile search in the Chukchi Sea. Shell has also privately made clear it is taken aback by the public protests against the drilling which are threatening to seriously damage its reputation. Ben van Beurden, the chief executive, is also said to be worried that the Arctic is undermining his attempts to influence the debate around climate change. His attempts to argue that a Shell strategy of building up gas as a “transitional” fuel to pave the way to a lower carbon future has met with scepticism, partly because of the Arctic operations. Read More here

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28 August 2015, The Guardian, Extreme Arctic sea ice melt forces thousands of walruses ashore in Alaska. Survival of walruses threatened as they wash ashore on a remote barrier island just before Obama is due to visit region to draw attention to climate change. The extreme loss of Arctic sea ice due to climate change is forcing thousands of walruses to crowd ashore on a remote barrier island off Alaska, and threatening their survival. Barack Obama will be the first US president to visit the Alaskan Arctic on 31 August on a three-day tour to draw attention to the drastic consequences of climate change for the Arctic, such as warming winters and the rapid retreat of sea ice. The first reported sighting of animals forced to come ashore in the Chukchi Sea was by a photographer on 23 August, and confirmed by villagers in the remote hamlet of Point Lay late on Thursday, the US Fish and Wildlife Service said. Such landings, forced by the absence of sea ice on which to rest and feed, put the animals at risk of stampede in the limited space of the barrier island. The animals are easily spooked by aircraft or onlookers, government scientists warned. Trampling deaths are one of the biggest natural risks. Sea ice cover in the winter months fell to a new low this year because of climate change and abnormal weather patterns. Read More here