24 August 2016,Climate Home, Adaptation takes centre stage as IPCC prepares 1.5C study. Tackling climate change is no longer simply about cutting greenhouse gas emissions: flood defences, heat resilient crops and weather warning systems are set to take centre stage. That’s the message from scientists fresh from an Intergovernmental Panel on Climate Change (IPCC) meeting in Geneva last week. The UN science body has started work on a new and potentially devastating report on ways to avoid warming the earth to more than 1.5C above pre-industrial levels – and the consequences of failure. Due in September 2018, it will set the political tenor for global talks on climate change through to 2020, by which time the new Paris Agreement on climate change is slated to become operational. Critically, it will underpin a UN-led review the same year into how countries are delivering on the Paris deal, and perhaps offer the basis for those national goals to be increased. …… The trouble is it’s effectively too late for that, said Chris Field, co-chair of the IPCC’s last major study and a colleague of Mach’s at the Carnegie Institution and Stanford University. Read More here
Tag Archives: Emissions
18 August 2016, Reuters, Scientists to probe ways of meeting tough global warming goal. Scientists on Thursday set the outlines of a report on how to restrict global warming to a limit agreed last year by world leaders – even though the temperature threshold is at risk of being breached already. The U.N.-led study, due to be published in 2018 as a guide for governments, will look into ways of cutting greenhouse gas emissions to cap the rise at 1.5 degrees Celsius (2.7 Fahrenheit) above pre-industrial levels. It will examine impacts of a 1.5C rise on vulnerable parts of the world including Greenland’s ice sheet and coral reefs. Thelma Krug, a Brazilian scientist who led the four-day meeting in Geneva, said it will also cast the fight against climate change as part of a wider struggle to end poverty and ensure sustainable growth. “Rapid changes are needed for (no rise above) 1.5C,” she told Reuters.World leaders agreed to work towards that target at a meeting in Paris in December, also requesting the report as part of a global agreement to phase out greenhouse gas emissions, mainly from burning fossil fuels, in the second half the century. The global rise reached 1.3C in the first half of 2016, which is almost certain to be the warmest year since records began in the 19th century, beating 2015. Some studies indicate emissions could breach levels consistent with 1.5C within about five years. Many show temperatures overshooting that limit and then being reduced later by extracting greenhouse gases from the atmosphere with yet-to-be developed technology. “It will be difficult, but there are also opportunities,” said Sabine Fuss, a delegate at the Geneva meeting from the Mercator Institute on Global Commons and Climate Change. Costly action now could help avert even more expensive damage from floods, heat waves, extinctions and rising ocean levels, she said. Read More here
7 August 2016, The Guardian, Scientists warn world will miss key climate target. Grim backdrop to vital global emissions talks as new analysis shows 1.5C limit on warming is close to being broken. Leading climate scientists have warned that the Earth is perilously close to breaking through a 1.5C upper limit for global warming, only eight months after the target was set. The decision to try to limit warming to 1.5C, measured in relation to pre-industrial temperatures, was the headline outcome of the Paris climate negotiations last December. The talks were hailed as a major success by scientists and campaigners, who claimed that, by setting the target, desertification, heatwaves, widespread flooding and other global warming impacts could be avoided. However, figures – based on Met Office data – prepared by meteorologist Ed Hawkins of Reading University show that average global temperatures were already more than 1C above pre-industrial levels for every month except one over the past year and peaked at +1.38C in February and March. Keeping within the 1.5C limit will be extremely difficult, say scientists, given these rises. These alarming figures will form the backdrop to the Intergovernmental Panel on Climate Change talks in Geneva this month, when scientists will start to outline ways to implement the climate goals set in Paris. Dates for abandoning all coal-burning power stations and halting the use of combustion engines across the globe – possibly within 15 years – are likely to be set. Read More here
25 July 2016, IOP SCience: Readily implementable techniques can cut annual CO2 emissions from the production of concrete by over 20%. Due to its prevalence in modern infrastructure, concrete is experiencing the most rapid increase in consumption among globally common structural materials; however, the production of concrete results in approximately 8.6% of all anthropogenic CO2 emissions. Many methods have been developed to reduce the greenhouse gas emissions associated with the production of concrete. These methods range from the replacement of inefficient manufacturing equipment to alternative binders and the use of breakthrough technologies; nevertheless, many of these methods have barriers to implementation. In this research, we examine the extent to which the increased use of several currently implemented methods can reduce the greenhouse gas emissions in concrete material production without requiring new technologies, changes in production, or novel material use. This research shows that, through increased use of common supplementary cementitious materials, appropriate selection of proportions for cement replacement, and increased concrete design age, 24% of greenhouse gas emissions from global concrete production or 650 million tonnes (Mt) CO2-eq can be eliminated annually. Research Paper: Read More here