Written By: Emma Webdale
World-leading climate scientists meeting this week in Sweden have agreed that human induced global warming since the 1950s is “extremely likely”, with temperatures probably to surpass the danger threshold of a 2C global increase due to failure of curbing greenhouse emissions.
This week, climate scientists from the Intergovernmental Panel on Climate Change (IPCC) working group have disclosed the first part of its major report, stating that evidence for human induced climate change since the 1950s– particularly emissions of greenhouse gases is stronger than ever.
Meeting for the first time since 2007, the IPCC has gathered hundreds of papers from more than 800 scientists to produce an overall assessment of the risks of global warming.
Based upon projected levels of gas and aerosol emissions, three out of four future climate change scenarios suggest that by the end of this century global temperatures are likely to be 1.5C higher than pre-industrial levels. In two of the four scenarios, warming was expected to increase over 2C by the year 2100 – the benchmark that scientists warn will create devastating effects on the planet.
“Continued emissions of greenhouse gases will cause further warming and changes in all components of the climate system. Limiting climate change will require substantial and sustained reductions of greenhouse gas emissions”, said Thomas Stocker, co-chair of the working group.
The report warns that even if carbon dioxide emissions are aggressively curbed and sustained, the effects of climate change will continue to show over several hundreds of years, including extreme weather events.
According to The Telegraph, the report also confirms that sea levels have risen by 19cm since 1901.The report further warns that levels will continue to rise as Arctic sea and glaciers around the world steadily shrink in the future due to increasing surface temperatures.
Commenting on the report, Qin Dahe, co-chair of the working group said, “Our assessment of the science finds that the atmosphere and ocean have warmed, the amount of snow and ice has diminished, the global mean sea level has risen and the concentrations of greenhouse gases have increased.”
He added, “As the ocean warms, and glaciers and ice sheets reduce, global mean sea level will continue to rise, but at a faster rate than we have experienced over the past 40 years.”
The condensed summary of the report, targeted at policymakers will be released on Monday.