IPCC 6th Assessment Report Summary

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August 9, 2021, the United Nations’ official climate experts committee released an updated report on climate change’s physical evidence and a list of solutions for policy makers. Since the International Panel on Climate Change’s last report, the AR5 (released in 2014), UN experts have made modifications in their modeling techniques and data analysis regarding anthropogenic climate change.

What Did the 2022 IPCC Report Say?

The AR6 reports, with varying degrees of confidence, that the last few decades have been marked by increasing average surface temperature (0.8°C to 1.3°C for the years 1850-1900 to the years 2010-2019), increasing precipitation levels, melting ice sheets in the Antarctic and Greenland, rising upper-ocean temperatures (depth of 0-700 meters) and rises in global sea levels. UN climate experts believe that human influence has contributed to some long-term weather changes.

Researchers also provide reconstructed data that simulates the mean surface temperature over the last 100,000 years. It is within the last 2,000 years that an unprecedented spike occurs in surface temperatures. Climate models suggest that rises in greenhouse gas levels, land use, ozone use, and other human activities help explain the rise in average global surface temperatures. The concentrations of carbon dioxide and methane exceed natural multi-millennial levels; these natural gases happen to be some of the primary products of human industrial activities, such as agriculture, organic waste, and energy production.

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