Record high CO2 emissions delay global peakNovember 13, 2017
Global carbon emissions are on the rise again in 2017 after three years of little-to-no growth, according to researchers at the University of East Anglia and the Global Carbon Project.
It was previously hoped that emissions might soon reach their peak after three stable years, so the new projection for 2017 is an unwelcome message for policy makers and delegates at the UN Climate Change Conference (COP 23) in Bonn this week.
The research, published today simultaneously in the journals Nature Climate Change, Earth System Science Data Discussions and Environmental Research Letters, reveals that global emissions from all human activities will reach 41 billion tonnes in 2017, following a projected 2% rise in burning fossil fuels.
The figures point to China as the main cause of the renewed growth in fossil emissions - with a projected growth of 3.5%.
CO2 emissions are expected to decline by 0.4% in the US and 0.2% in the EU, smaller declines than during the previous decade.
Increases in coal use in China and the US are expected this year, reversing their decreases since 2013.
Lead researcher Prof Corinne Le Quéré, director of the Tyndall Centre for Climate Change Research at UEA, said: "Global CO2 emissions appear to be going up strongly once again after a three year stable period. This is very disappointing.
"With global CO2 emissions from human activities estimated at 41 billion tonnes for 2017, time is running out on our ability to keep warming well below 2ºC let alone 1.5ºC.
"This year we have seen how climate change can amplify the impacts of hurricanes with more intense rainfall, higher sea levels and warmer ocean conditions favouring more powerful storms. This is a window into the future. We need to reach a peak in global emissions in the next few years and drive emissions down rapidly afterwards to address climate change and limit its impacts."
- In 2017, CO2 emissions from fossil fuels and industry are projected to grow by 2% (0.8% to 3%). This follows three years of nearly no growth (2014-2016). (GDP to rise 3.6% according to IMF figures).
- Global CO2 emissions from all human activities are set to reach 41 billion tonnes (41 Gt CO2) by the end of 2017. Meanwhile emissions from fossil fuels are set to reach 37 Gt CO2 - a record high.
- China's emissions are projected to grow by 3.5% (0.7% to 5.4%), driven by a rise in coal consumption (GDP up 6.8%).
- India's emissions are projected to grow by just 2 % (0.2% to 3.8%) - down from over 6% per year during the last decade (GDP up 6.7%).
- US emissions are projected to decline by -0.4%(-2.7% to +1.9%), with coal consumption projected to rise slightly (GDP up 2.2%).
- EU emissions are tentatively projected to decline -0.2% (-2% to +1.6%), a smaller decline than the previous decade (GDP up 2.3%).
- CO2 emissions decreased in the presence of growing economic activity in 22 countries representing 20 per cent of global emissions.
- Renewable energy has increased rapidly at 14% per year over the last five years - albeit from a very low base.
- Atmospheric CO2 concentration reached 403 parts per million in 2016, and is expected to increase by 2.5 ppm in 2017.
"The growth in 2017 emissions is unwelcome news, but it is too early to say whether it is a one-off event on a way to a global peak in emissions, or the start of a new period with upward pressure on global emissions growth."
The team flags that persistent uncertainties exist in our ability to estimate recent changes in emissions, particularly when there are unexpected changes as in the last few years.
"Even though we may detect a change in emission trend early, it may take as much as 10 years to confidently and independently verify a sustained change in emissions using measurements of atmospheric concentrations of carbon dioxide," said Dr Peters.
"Policy makers in Bonn are preparing for the Global Stocktake under the Paris Agreement, that will start in 2018 and occur every five years, and this puts immense pressure on the scientific community to develop methods and perform measurements that can truly verify changes in emissions within this five-yearly cycle," said Prof Le Quéré.
University of East Anglia
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