5 November 2015, Renew Economy, 50 years after warning, no debate in Paris on the science. Diplomats steeling themselves for a historic round of United Nations climate negotiations remain divided by a handful of stubborn disputes. Discord persists over financial and procedural issues, for example, and over how pollution from farming and deforestation should be addressed alongside energy generation. The fundamentals of climate science, however, are not among the issues being debated. The 50-year anniversary of the first detailed climate change warning issued to a U.S. president is Thursday, less than a month before a historic two-week climate negotiating session begins in Paris. The golden anniversary is coinciding with a rich embrace of climate science in global negotiations. “There are plenty of challenging issues for the negotiators, but the basic science of climate change is not one of them,” said Harvard University economics professor Robert Stavins, an expert on the talks. “So-called climate skepticism is essentially irrelevant to the outcome.” Countries that have been “trying to undercut international climate action,” including Malaysia and Saudi Arabia, often “play the bad guys,” said Jake Schmidt, director of the Natural Resources Defense Council’s international program, but “not by denying that climate change exists.” The carbon dioxide chapter of the 1965 Restoring the Quality of Our Environment report, produced by President Lyndon B. Johnson’s science advisory committee, cited climate change research dating back to 1899. The science in the chapter was “basically right,” said Ken Caldeira, an atmospheric science professor at Stanford University. It warned loosely of ice caps melting, seas rising, temperatures warming, and water bodies acidifying. In the five decades since, a frenzy of multidisciplinary scientific endeavours has helped humanity pinpoint and project, with increasing and worrying precision, the consequences of rising levels of atmospheric greenhouse gases. Meanwhile, those impacts have shifted from being hypothetical to being real. Read More here
Tag Archives: UNFCCC
4 November 2015, New York Times, The Tough Realities of the Paris Climate Talks. In less than a month, delegates from more than 190 countries will convene in Paris to finalize a sweeping agreement intended to constrain human influence on the climate. But any post-meeting celebration will be tempered by two sobering scientific realities that will weaken the effectiveness of even the most ambitious emissions reduction plans that are being discussed. The first reality is that emissions of carbon dioxide, the greenhouse gas of greatest concern, accumulate in the atmosphere and remain there for centuries as they are slowly absorbed by plants and the oceans. This means modest reductions in emissions will only delay the rise in atmospheric concentration but will not prevent it. Thus, even if global emissions could be reduced by a heroic average 20 percent from their “business as usual” course over the next 50 years, we would be delaying the projected doubling of the concentration by only 10 years, from 2065 to 2075. This is why drastic reductions would be needed to stabilize human influences on the climate at supposed “safe” levels. According to scenarios used by the United Nations Intergovernmental Panel on Climate Change, global annual per capita emissions would need to fall from today’s five metric tons to less than one ton by 2075, a level well below what any major country emits today and comparable to the emissions from such countries as Haiti, Yemen and Malawi. For comparison, current annual per capita emissions from the United States, Europe and China are, respectively, about 17, 7 and 6 tons. The second scientific reality, arising from peculiarities of the carbon dioxide molecule, is that the warming influence of the gas in the atmosphere changes less than proportionately as the concentration changes. As a result, small reductions will have progressively less influence on the climate as the atmospheric concentration increases. The practical implication of this slow logarithmic dependence is that eliminating a ton of emissions in the middle of the 21st century will exert only half of the cooling influence that it would have had in the middle of the 20th century. Read More here
3 November 2015, ITV, What you need to know about the Paris climate change summit. A meeting later this month will see 190 nations convene in Paris to try and work out a way to tackle climate change. Here is what you need to know about it: What is the Paris meeting? On November 30, 190 nations will gather for two weeks to try and work out a deal to tackle climate change. The aim will be to find a way to reduce the global emissions of greenhouse gases – such as carbon dioxide and methane – over the coming decades to avoid the world’s average temperature increasing by no more than 2C by the end of this century. That’s compared to the world’s temperature before the industrial revolution around 150 years ago, when parts of the world began the mass burning of fossil fuels. Go above that rise in temperature, say scientists, and we tip over into “dangerous climate change” where there will be drastic increases in floods, storms, heatwaves and other catastrophic and irreversible environmental changes around the world. These will disproportionately affect the poorest parts of the world, those least able to adapt. At the moment, if the world does nothing, it is on course for a 5C temperature rise by 2100. This might not seem like much, but bear in mind that the average difference between now and the Earth’s previous Ice Age was around 5C. Read More here
2 November 2015, Climate News Network, Cash is key to Paris climate talks success. Former key figure in UN climate change policy-making says economists now see that development without destroying the environment is the only way forward. In a world entirely divorced from the politics and rhetoric surrounding the continuing climate change negotiations, countries are quietly getting on with rapid development combined with environmental protection. Yvo de Boer, former executive secretary of the United Nations Framework Convention on Climate Change, has found renewed hope and a different perspective as the Director-General of the Global Green Growth Institute, which he is running from Seoul in South Korea. “People in Asia have moved away from the idea that development comes first and then we can then worry about the environment,” he says. “Here, there is terrible poverty, but they have realised that the development, social inclusion and protecting the environment must go hand in hand.” He said it was clear from talking to economists at the International Monetary Fund and the Organisation for Economic Co-operation and Development in Paris that they too realise that clean development is not just the best way forward but the only way. Read More here