“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 that concentration of greenhouse gases have increased”, Qin Dahe, co-chair of IPCC working group one.
On Friday 27th September the UN sponsored Intergovernmental Panel on Climate Change (IPCC) released the first part of a trilogy, which is due over the next 12 months, reporting on the physical evidence behind climate change.
The report states that each of the last three decades has been successively warmer at the Earth’s surface, and warmer than any period since 1850, and probably warmer than any time in the past 1,400 years. The panel warns that in order to prevent further warming and changes to the climate system, substantial and sustained reductions of greenhouse gases must occur, proving how valuable renewable energy is.
The report plays down a plateau in temperatures in the period since 1998. The scientists highlight that this began with a very hot El Niño year and that 15 years is too short to reflect long-term trends.
The 36-page document has 209 lead authors and 50 review editors from 39 countries and is based on around 9,000 peer-reviewed scientific papers and 50,000 comments from the expert reviewers.