30 January 2018, The Conversation, Climate scientists explore hidden ocean beneath Antarctica’s largest ice shelf. Antarctica’s Ross Ice Shelf is the world’s largest floating slab of ice: it’s about the size of Spain, and nearly a kilometre thick. The ocean beneath, roughly the volume of the North Sea, is one of the most important but least understood parts of the climate system. We are part of the multi-disciplinary Aotearoa New Zealand Ross Ice Shelf programme team, and have melted a hole through hundreds of metres of ice to explore this ocean and the ice shelf’s vulnerability to climate change. Our measurements show that this hidden ocean is warming and freshening – but in ways we weren’t expecting. A hidden conveyor belt All major ice shelves are found around the coast of Antarctica. These massive pieces of ice hold back the land-locked ice sheets that, if freed to melt into the ocean, would raise sea levels and change the face of our world. An ice shelf is a massive lid of ice that forms when glaciers flow off the land and merge as they float out over the coastal ocean. Shelves lose ice by either breaking off icebergs or by melting from below. We can see big icebergs from satellites – it is the melting that is hidden. Because the water flowing underneath the Ross Ice Shelf is cold (minus 1.9C), it is called a “cold cavity”. If it warms, the future of the shelf and the ice upstream could change dramatically. Yet this hidden ocean is excluded from all present models of future climate. All major ice shelves are found around the coast of Antarctica. These massive pieces of ice hold back the land-locked ice sheets that, if freed to melt into the ocean, would raise sea levels and change the face of our world. An ice shelf is a massive lid of ice that forms when glaciers flow off the land and merge as they float out over the coastal ocean. Shelves lose ice by either breaking off icebergs or by melting from below. We can see big icebergs from satellites – it is the melting that is hidden. Because the water flowing underneath the Ross Ice Shelf is cold (minus 1.9C), it is called a “cold cavity”. If it warms, the future of the shelf and the ice upstream could change dramatically. Yet this hidden ocean is excluded from all present models of future climate. Read More here
hmcadmin
29 January 2018, Renew Economy, Victorian networks blow a fuse in heatwave – Coalition blows its mind on Twitter. Conservatives love a summer blackout. And with two-thirds of peak blackout season already gone, they were not going to miss the opportunity presented by last night’s outages across Victoria to point the finger at renewable energy, the state Labor government’s support of renewables, and most of all last year’s closure of the privately owned Hazelwood coal-fired power plant. The only slight hitch in this ingenious plan is that none of the above had anything at all to do with it. On Sunday, the state reached record grid demand for a Sunday in the midst of the heatwave, but around 55,000 Victorians suffered without power at various times on Sunday evening – and many continue to do so on Monday – after faults across the state’s distribution networks. As explained by the Energy Networks Association, the assorted network companies, and the Australian Energy Market Operator, the blackouts were caused by faults in the *delivery* of the electricity – and not the *supply* or generation of it. That is, as absolutely everyone in the state turned their air conditioners up to 11 to cope with temperatures hovering around 40°C – and an overnight low of around 30°C – the state’s “poles and wires” (mostly substation fuses) systems were overwhelmed by demand that peaked at around 9,144MW: “the highest operational demand for a Sunday, ever,” says AEMO. Read More here
22 January 2018, The Guardian, Lloyd’s of London to divest from coal over climate change. Firm follows other big UK and European insurers by excluding coal companies from 1 April. Lloyd’s of London, the world’s oldest insurance market, has become the latest financial firm to announce that it plans to stop investing in coal companies. Lloyd’s will start to exclude coal from its investment strategy from 1 April. The definition of what is a coal company and the criteria for divestment will be set over the coming months. The firm has long been vocal about the need to battle climate change, with insurance one of the worst affected industries by hurricanes, wildfires and flooding in recent years. The insurance market decided last month to implement a coal exclusion policy as part of a responsible investment strategy for the central mutual fund that sits behind every insurance policy written by the Lloyd’s market. Inga Beale, Lloyd’s of London chief executive, said: “That means that in the areas of our portfolio where we can directly influence investment decisions we will avoid investing in companies that are involved mainly in coal. “Is there more the insurance sector could be doing to help the world transition to a low-carbon economy by choosing sustainable or low-carbon stocks?” Lloyd’s does not underwrite operations directly, but offers a marketplace to almost 90 syndicates of other insurers. Lloyd’s has been slower to take action than others. Other big UK and European insurance companies, including Aviva, Allianz, Axa, Legal & General, SCOR, Swiss Re and Zurich, have been shifting away from coal and other fossil fuels due to concerns about climate risks. About £15bn has been divested by insurers in the past two years, according to a recent report from Unfriend Coal Network, a global coalition of NGOs and campaigners including 350.org and Greenpeace. It said 15 companies – almost all in Europe – have fully or partially cut financial ties by selling holdings in coal companies and refusing to insure their operations. Read More here
27 January 2018, DeSmog, Macron’s Pledge to Wipe out Coal Is Just as Meaningless as Trump’s Plan to Revive It. In a speech at the 2018 World Economic Forum held in Davos, Switzerland, French President Emmanuel Macron said he wanted to “make France a model in the fight against climate change” and promised to shut all coal-fired power plants by 2021 — two years earlier than the timetable put forward by his predecessor. While Macron’s move is mainly symbolic since France only generates about 2.2 percent of its power from coal, it signals his government is actively trying to wean itself off fossil fuels in sharp contrast to the current policy of his U.S. counterpart. “We have finally ended the war on coal,” pretty much sums up American policy these days, as President Donald Trump declared in a recent speech. Behind the headlines and clear policy contrasts, however, lies an important point: The U.S. is likely to become coal plant free anyway, with or without presidential support. The reason is economics, which, as always, trumps the words of a politician — even if it can take longer. The US and Coal In the U.S., the Energy Information Administration has been charged, since the energy crises of the 1970s, with providing an unbiased view of the types of energy used to power the U.S. economy. Its data show that in 2006 about 10 percent of all electric power plants — 616 — ran on coal. By 2016, the latest year for which data are available, that figure dropped to just 4 percent, or 381 coal-fired power plants. That compares with 1,801 natural gas plants and 3,624 “other renewables” such as wind, up from 1,659 and 843 in 2006, respectively. Read More here