12 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
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