IPCC 6th Assessment Report - the magnitude of the crisis defined

 

The 6th Assessment Report from the IPCC makes for sobering reading and was issued prior to COP26 in Glasgow.  In summary, the report has found that:

• Human induced climate change is already affecting many weather and climate extremes in every region across the globe. Evidence of observed changes in extremes such as heatwaves, heavy precipitation, droughts, and tropical cyclones has strengthened since the 5th Assessment Report.
• Global surface temperatures will continue to increase until at least mid-century under all emission scenarios considered. Global warming of 1.5C and 2C will be exceeded during the 21st century unless deep reduction in carbon dioxide (CO2)  and other greenhouse gas emissions occur in the coming decades.
• Under scenarios with increasing CO2 emissions, the ocean and land carbon sinks are projected to be less effective at slowing the accumulation of CO2 in the atmosphere.
• Continued global warming is projected to further intensify the global water cycle including its variability, global monsoon precipitation and the severity of wet and dry events.
• With further global warming, every region is projected to increasingly experience concurrent and multiple changes in climatic impact-drivers.
• Low-likelihood outcomes such as ice sheet collapse, abrupt ocean circulation changes, some compound extreme events and warming substantially larger than the assessed 'very likely' range cannot be ruled out.
• Strong rapid and sustained reduction in CH4 (methane) would also limit the warming effect resulting from declining aerosol pollution and would improve air quality.

The report now finds that serious climate impacts that previously were thought to be less likely, are now considered to be possible due to the accelerated increase in global warming. 

The report can be accessed at this link: IPCC Sixth Assessment Report