![]() The rate of increase during 2020 does not appear to reflect reduction in pollution emissions due to the sharp, worldwide economic slowdown in response to the coronavirus pandemic. No apparent response to economic impact of coronavirus ”We continue to commit our planet – for centuries or longer – to more global heating, sea level rise, and extreme weather events every year.” If humans were to suddenly stop emitting CO 2, it would take thousands of years for our CO 2 emissions so far to be absorbed into the deep ocean and atmospheric CO 2 to return to pre-industrial levels. “Progress in emissions reductions is not visible in the CO 2 record,” said Pieter Tans, senior scientist with NOAA’s Global Monitoring Laboratory. Monthly carbon dioxide (CO 2) values at Mauna Loa first breached the 400 ppm threshold in 2014, and are now at levels not experienced by the atmosphere in several million years. Scripps scientists reported an May average of 417.2 ppm. NOAA scientists reported a May average of 417.1 ppm. This year’s peak value was 2.4 parts per million (ppm) higher than the 2019 peak of 414.7 ppm recorded in May 2019. Seasonal peak reaches 417 parts per million at Mauna Loa observatoryĪtmospheric carbon dioxide measured at Mauna Loa Observatory reached a seasonal peak of 417.1 parts per million for 2020 in May, the highest monthly reading ever recorded, scientists from NOAA and Scripps Institution of Oceanography at the University of California San Diego announced today.
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