8 December 2016, The Conversation, Climate shenanigans at the ends of the Earth: why has sea ice gone haywire? There is no doubt that 2016 has been a record-breaking year for Earth’s climate. We will have to wait another couple of months for the final tally, but 2016 will be the hottest year in recorded history globally. Average temperatures are well above 1℃ warmer than a century ago. Global average temperatures, and “global warming”, often give the impression of a gradual change in Earth’s climate occurring uniformly across the planet. This is far from the truth – particularly at the ends of the Earth. The Arctic and Antarctic are behaving very differently from the global picture. One particular polar change that has caught the attention of scientists and the media this year has been the state of sea ice. The seasonal growth and decay of sea ice over the Arctic and Southern oceans is one of the most visible changes on Earth. But in the past few months its seasonal progression has stalled, plunging Earth’s sea ice cover off the charts to the lowest levels on record for November. Explaining what has caused this unexpectedly dramatic downturn in sea ice is a tale of two poles. Arctic amplifiers The northern polar region is an epicentre for change in our warming world. On average, the Arctic is warming at around twice the global average rate. This is due to several environmental processes in the Arctic that amplify the warming caused by rising atmospheric greenhouse gas levels. One of these amplifiers is the sea ice itself. …The southern story It’s a different story when we look at the ocean-dominated southern hemisphere. Antarctic climate records point to a delay in some of the effects of “global warming”. The reasons are still debated, partly because of the much shorter climate records that scientists have to work with in the Antarctic. But it is likely that the expansive Southern Ocean is an important climate change dampener that is able to “hide” some of the extra heat being absorbed by our planet beneath the ocean surface where we don’t feel it – yet. Read more here
Monthly Archives: December 2016
7 December 2016, Climate Home, Full circle: 33 hours in Australian climate policy. It took just over a day for the suggestion of a carbon price to be stamped out by right-wing MPs who hold the prime minister in their thrall. If you have ever wondered how Australian climate policy was high jacked by a minority group of government conservatives, Monday and Tuesday are worth a review. For Malcolm Turnbull and his government, this is a very old dance. The name of the jig is carbon pricing, a policy considered politically mundane across much of the world. The World Bank records carbon pricing in 40 national jurisdictions and more than 20 cities, states, and regions. But in Australia the very notion has had party leaders of the left and right prancing and backflipping for years. This week’s rendition was as uptempo and gymnastic as has been performed yet. On Monday, energy and environment minister Josh Frydenberg was doing the early morning radio rounds. He was asked to fill in the blanks left by the terms of reference his department had released regarding the government’s scheduled 2017 review of climate policy. Would it include a form of carbon pricing? Not on the whole economy, said Frydenberg: that’s Labor’s thing. But he went on: “The review is explicit about looking at sector-by-sector approaches and given that the electricity sector is about one third of the total emissions across the economy it’s only appropriate to see if we’ve got the best mechanisms in place… A number of organisations have recommended an emissions intensity scheme but again this review still has a long way to go.” Analysis: China prepares for world’s biggest carbon market An emissions intensity scheme would necessitate placing a value on carbon. Frydenberg had opened the door and a whole flock of crazy was about to walk through. Read More here
7 December 2016, Climate Home, UN to extend freeze on climate change geoengineering. Draft documents suggest countries will agree to further ban on large-scale climate techno-fixes, warning risks of damage to biodiversity outweigh potential benefits. Countries should resist the urge to experiment with large scale planetary geoengineering until it’s clear what the consequences of meddling with the oceans or atmosphere may be. That’s the nub of a decision expected to be taken at the UN’s biannual biodiversity summit taking place in Cancun, Mexico this week, emphasising a “precautionary approach” to such projects. With greenhouse gas emissions closing in on levels that could guarantee warming of 1.5C above pre industrial levels and an El Nino-boosted 2016 likely to be the hottest year on record, some scientists are looking to emergency measures. But the UN is sticking to a familiar line: pumping the atmosphere with tiny mirrors to deflect sunlight, boosting the uptake of CO2 in oceans by stimulating plankton growth, or burning wood and pumping the emissions underground could be a bad idea. “We’re concerned that with any initiative regarding the use of geoengineering there needs to be an assessment,” UN biodiversity chief Braulio Ferreira de Souza Dias told Climate Home. “These can have unforeseen results and spin-offs. If you capture carbon in the oceans, this is effective through all the food chains.” Even national risk assessments on individual geoengineering projects would still form an “incomplete basis for global regulation” says the latest iteration of the UN draft decision, echoing previous Convention on Biological Diversity (CBD) decisions in 2010, 2012 and 2014. “More trans-disciplinary research and sharing of knowledge among appropriate institutions is needed,” it says, citing potential impacts on ecosystems and potential ethical issues. Read More here
7 December 2016, Climate Home, There’s a secret UN climate summit taking place in Mexico. UN biodiversity chief tells Climate Home protecting and restoring ecosystems is the best way to protect the world from dangerous levels of global warming. There’s a UN climate change meeting involving nearly 200 governments taking place right now in the Mexican holiday resort of Cancun. It’s not making many headlines, but then the biannual UN Convention on Biological Diversity (CBD) conference rarely does. Especially not in a year like 2016. And that’s a pity, because at stake is the air you breathe, the trees that surround you and the fate of the earth’s 8.7 million species of flora and fauna. Also at stake is the ability of communities across the world to cope with erratic weather patterns linked to climate change like flash flooding, acidifying oceans, drought and storms. “Everything is inter-linked,” says Braulio Ferreira de Souza Dias, a former Brazilian government official who has been executive secretary of the CBD since 2012. “If countries want to meet the Paris climate agreement and the sustainable development goals in 2030 they also need to make progress in biodiversity.” That means slowing and then reversing deforestation so there are more trees to suck up carbon emissions from fossil fuels, and managing wetlands that can act as a buffer against storm surges. It means working out how countries can better manage livestock and look after fish stocks so species can be supported if their habitats are damaged or waters become too acidic. “Unless we can do a better job we won’t make it,” says Dias, who argues that countries and businesses are – eventually – starting to understand why biodiversity matters. The Brazilian leaves his role after this meeting, but he wants governments to understand that building walls as protection – no Trump pun intended – is not going to crack it. Read More here