28 February 2017, Climate News Network, Inequalities fuel human impacts on climate. For the second time this year, a group of climate scientists has called for a new approach to climate change research to produce a better and more precise idea of how the world will change as global average temperatures rise. The call comes only weeks after a distinguished international team reminded researchers that some details of the planetary climate machine are still unresolved – such as what happens to all the carbon released by fossil fuel combustion, and how rainfall patterns will change in the decades to follow. Neither group is challenging the general climate models, which broadly predict that, unless action is taken, global average temperatures could rise by 4°C and global sea levels by a metre or so. What each wants is more detailed answers. The latest call comes from a team of US and Japanese scientists, who argue in their report in National Science Review journal that the human dimension is missing. What people do over the next decades will feed back into the mechanics of climate change. Missing dimensions The missing dimensions of the human impacts and contribution, they say, are threefold: the economic inequalities that stoke conflict and drive migration; the levels and patterns of consumption of resources that fuel these inequalities; and the numbers of people consuming these resources and demanding energy to improve their lives over the next two generations. For instance, the scientists say, human choices make a difference. The rate of atmospheric concentrations of the greenhouse gases carbon dioxide, methane and nitrous oxide increased 700-fold, 1,000-fold and 300-fold respectively after the “green revolution” of the 1960s, compared with pre-industrial levels. Population growth was a factor. So was economic growth. And this corresponded to a doubling of human impacts every 17 years. “The doubling of this impact is shockingly rapid,” says the study leader, Safa Motesharri, a systems scientist at the University of Maryland’s National Socio-Environmental Synthesis Centre. Read More here
Monthly Archives: February 2017
23 February 2017, The Conversation, Australia’s 2016 environment scorecard: rains return but in some cases too late. After several dry years, vegetation across much of Australia received much-needed rains in 2016. But this broad pattern of improvement belies some major environmental damage in parts of the country – particularly in Tasmania, which was scorched by bushfire, the Gulf Coast and Cape York, which missed out on the rains’ return, and on the Great Barrier Reef, which suffered massive coral bleaching. That is the conclusion of our report on Australia’s Environment in 2016, released today. It’s a summary of the state of the nation’s environmental indicators, which we compiled by analysing huge amounts of satellite imagery, ground data, and water and landscape modelling. The report and the accompanying Australia’s Environment Explorer website summarise those data into graphs and plots for 13 environmental indicators. With most data extending back to at least the year 2000, this makes it possible to see how the environment is changing. Read More here
21 February 2017, The Conversation, Labor’s climate policy could remove the need for renewable energy targets. The federal Labor Party has sought to simplify its climate change policy. Any suggestion of expanding the Renewable Energy Target has been dropped. But there is debate over whether the new policy is actually any more straightforward as a result. One thing Labor did confirm is its support for an emissions intensity scheme (EIS) as its central climate change policy for the electricity sector. This adds clarity to the position the party took to the 2016 election and could conceivably remove the need for a prescribed renewable energy target anyway. An EIS effectively gives electricity generators a limit on how much carbon dioxide they can emit for each unit of electricity they produce. Power stations that exceed the baseline have to buy permits for the extra CO₂ they emit. Power stations with emissions intensities below the baseline create permits that they can sell. An EIS increases the cost of producing electricity from emissions-intensive sources such as coal generation, while reducing the relative cost of less polluting energy sources such as renewables. The theory is that this cost differential will help to drive a switch from high-emission to low-emission sources of electricity. The pros and cons of an EIS, compared with other forms of carbon pricing, have been debated for years. But two things are clear. Read More here
20 February 2017, The Guardian, Turnbull says own rooftop solar not inconsistent with ‘clean-coal’ message. Malcolm Turnbull has hit back at suggestions that his house’s large personal rooftop solar and battery system sends a message contrary to the government’s endorsement of “clean coal”. He rejected the idea that he had ever been critical of the renewables sector and dismissed his treasurer’s brandishing of a lump of coal in question time as “theatrics”. “It’s not a question of beliefs, saying ‘Do you believe in renewables?’,” the prime minister said. “It’s like saying ‘Do you believe in tables?’ Renewables are there, they are doing well, they have got certain characteristics and you have to design your grid to take account of that.” As his energy and environment minister, Josh Frydenberg, raised the prospect of changing the mandate of the Clean Energy Finance Corporation to accommodate coal, the prime minister said he had always been objective about energy. Asked whether his solar panels were enough to provide power to three average homes, Turnbull agreed that his personal 14.5kW system on the roof of his Point Piper home, with battery storage, was a “large array”. Turnbull went on to explain his position on climate change and his government’s energy policy. “I believe that climate change is a threat that we have to deal with,” Turnbull told ABC Perth. “I believe that we have to reduce our emissions. I believe that we need to ensure that we use all technologies to generate energy.” Read More here