The Intergovernmental Panel on Climate Change (IPCC) published its Sixth Assessment Report today (9 Aug 2021)
The main page with full report, summary reports and other material is here:
A short video explaining what the report is here
The 2-page headline summary is here and some extracts below
A.1 It is unequivocal that human influence has warmed the atmosphere, ocean and land.
Widespread and rapid changes in the atmosphere, ocean, cryosphere and biosphere have
occurred.
A.2 The scale of recent changes across the climate system as a whole and the present state
of many aspects of the climate system are unprecedented over many centuries to many
thousands of years.
A.3 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, and, in particular, their
attribution to human influence, has strengthened since the Fifth Assessment Report (AR5).
B.1 Global surface temperature will continue to increase until at least the mid-century under all
emissions scenarios considered. Global warming of 1.5°C and 2°C will be exceeded
during the 21st century unless deep reductions in carbon dioxide (CO2) and other
greenhouse gas emissions occur in the coming decades.
B.2 Many changes in the climate system become larger in direct relation to increasing global
warming. They include increases in the frequency and intensity of hot extremes, marine
heatwaves, and heavy precipitation, agricultural and ecological droughts in some regions,
and proportion of intense tropical cyclones, as well as reductions in Arctic sea ice, snow
cover and permafrost.
B.5 Many changes due to past and future greenhouse gas emissions are irreversible for
centuries to millennia, especially changes in the ocean, ice sheets and global sea level.
C.3 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 of future warming cannot be ruled out and are part of risk assessment.
#ClimateChange
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