31 March 2016, Energy Post, The end of coal: good riddance or dangerous gamble? Scotland has become the first part of the UK to stop burning coal to supply electricity following the closure of Longannet, its largest power station, on March 24. According to Paul Younger, Professor of Energy Engineering at University of Glasgow, the closure of coal-fired power plants in the UK may lead to serious problems with voltage control. Prepare for power interruptions and flickering lights. The closure of Longannet is a sign of the times, with the rest of the UK’s coal-fired power stations on death row after energy secretary Amber Rudd announced late last year that they will all be forced to close by 2025. For many reasons, it is hard to mourn the demise of coal-fired power. Around 12,000 miners are killed around the world each year, most of them digging for coal; abandoned mines cause widespread water pollution; and coal-fired plants pollute the air with the likes of nitrogen and sulphur compounds, as well as the highest greenhouse-gas emissions of any major source of energy generation. In the absence of carbon capture and storage, a technology which would be ready more quickly if the government backed it properly, plant closure may therefore seem sensible – even while we should help those that lose their jobs and regret the loss of skills from the workforce.If we are going to manage without Longannet and all the other gas-fired and coal-fired power stations, we would need at least 970 GWh of storage – more than a hundred pumped hydropower stations of comparable size to those we already have. That would be all there was to say were it not for a few harsh realities of electricity supply. There are two reasons why coal-fired power plants have survived so long. Coal is cheap; only since the US shale-gas boom has it been consistently beaten on price. And coal-fired plants are particularly suited to providing power on demand at short notice, as well as providing crucial stabilisation services for frequency and voltage across the grid. Read More here
Monthly Archives: March 2016
30 March 2016, Board on Atmospheric Sciences and Climate, Attribution of Extreme Weather Events in the Context of Climate Change (report). The science of extreme event attribution has advanced rapidly in recent years, giving new insight to the ways that human-caused climate change can influence the magnitude or frequency of some extreme weather events. Confidence is strongest in attributing types of extreme events that are influenced by climate change through a well-understood physical mechanism—for example, the more frequent heat waves that are closely connected to human-caused global temperature increases. Confidence is lower for other types of events, such as hurricanes, whose relationship to climate change is more complex and less understood at present. For any extreme event, the results of attribution studies hinge on how questions about the event’s causes are posed, and on the data, modeling approaches, and statistical tools chosen for the analysis. Read More here
31 March 2016, Action on HFC’s Heats Up, We’re seeing new movement toward phasing down the fastest-growing group of greenhouse gases – hydrofluorocarbons, or HFCs. These chemicals are widely used in refrigerators, air conditioners, foam products, and aerosols. And while they don’t stay in the atmosphere long, they can trap 1,000 times or more heat compared to carbon dioxide. This week, the U.S. Environmental Protection Agency (EPA) proposed new regulations demonstrating its commitment to limiting the use of HFCs domestically. It proposed changes to its significant new alternatives program (SNAP) aimed at expanding the list of acceptable alternatives that minimize impacts on global warming while also restricting the use of HFCs in sectors where alternatives are now available. EPA estimates the proposed rule could avoid up to 11 million metric tons of carbon dioxide equivalent in 2030, which is equal to the energy-related emissions from about one million homes for one year. Internationally, one sign of growing support for acting on HFCs came this month during the first visit by a U.S. president to Argentina in almost two decades. President Obama and newly elected Argentinian President Mauricio Macri explored opportunities to partner to address global challenges like climate change. They affirmed their commitment to take action this year to amend the Montreal Protocol to phase down HFCs, which are substitutes for ozone-depleting chlorofluorocarbons (CFCs) that were successfully phased out under the 1989 Montreal Protocol. The two leaders also endorsed the understandings reached at the Dubai Montreal Protocol meeting in November 2015 on financial support for developing countries to implement an HFC phasedown. A key opportunity will come next week when Montreal Protocol negotiators meet in Geneva to build on the progress made toward reaching agreement this year on an HFC phasedown amendment. Overcoming challenges The April meeting will consider a range of issues including: the availability of low global warming alternatives; guidelines for the Multilateral Fund in supporting developing country strategies for reducing HFCs; and legal aspects related to the UN Framework Convention on Climate Change. Among key questions to be addressed: Read More here
31 March 2016, Climate News Network, Science grapples with climate conundrums. New research illustrates that reactions of people, plants and animals to the changing climate are a key factor in unravelling the complexities of global warming. The evidence of a series of new studies shows that climate change is keeping the gurus guessing. Even when the grasslands become hotter and drier, the grass may still be green. And when summer temperatures rise and yields fall, it isn’t just because heat takes a toll of the crops, it is also because the farmers have decided to plant less, and plant less often. As economies slump, demand drops and oil prices plummet, then carbon dioxide emissions, paradoxically, start to soar again. And, against all intuition, you shouldn’t recharge an electric car at night when prices are low, because that could increase greenhouse gas emissions. Each study is a reminder that climate change is not a simple matter of atmospheric physics. The wild card, every time, is how people, plants and animals react to change. Read More here