Sacramento, California 2021-06-07 14:44:38 –
(CBS13 / CW31) – The annual peak of carbon dioxide, which traps heat in the air, has reached another dangerous milestone. It’s 50% higher than it was when the industrial era began.
Scientists reported on Monday that the average rate of increase was faster than ever.
National Oceanic and Atmospheric Administration Average carbon dioxide concentration It was 419.13ppm in May. This is 1.82 ppm higher than May 2020 and 50% higher than the pre-industrial stable level of 280 ppm, says NOAA climate scientist Pieter Tans.
Carbon dioxide levels peak in May each year, just before plants in the Northern Hemisphere bloom, and some of their carbon is sucked up from the atmosphere into flowers, leaves, seeds, and stems. However, the grace is temporary as carbon dioxide emissions from the burning of coal, oil and natural gas far exceed what plants can absorb, pushing greenhouse gas levels to new records each year. It is a thing.
“Achieving 50% higher carbon dioxide than before the Industrial Revolution is actually setting a new benchmark, but it’s not a good idea,” said Natalie Mahwald, a climate scientist at Cornell University. “If you want to avoid the worst consequences of climate change, you need to work harder to reduce carbon dioxide emissions.”
Climate change does more than just raise temperatures.Let Abnormal weather — Storms, wildfires, floods, droughts — Studies have shown that it gets worse, more frequent, the ocean rises, and becomes more acidic. There are also health effects such as. Heat death And Increased pollen. In 2015, each country Paris Agreement Try to keep climate change below what is considered a dangerous level.
Drought conditions intensified in parts of California last week, a US drought monitor reported Thursday. The entire state of California is currently in moderate drought or higher, officials said. Monitors said in a weekly update that the areas of “abnormal drought” in southern and eastern Sierra Nevada expanded in response to poor snow conditions.
Governor Gavin Newsom said the drought emergency declaration had been extended to 41 of California’s 58 counties and is likely to be further expanded.
Winter precipitation and snowfall in California are well below normal, with most of the meltwater absorbed into dry ground rather than flowing into rivers that fill reservoirs. The last time the entire state was rated for moderate drought or higher dates back to 2014.
Ralph Keeling, a geochemist at the Scripps Institution of Oceanography, said the year-long surge in carbon dioxide was not recorded, mainly due to the La Niña weather pattern, which temporarily cools parts of the Pacific Ocean. It was.Keeling’s father begins monitoring carbon dioxide at the top of a mountain in Hawaii Mauna Loa In 1958 he is now famous Keeling curve..
Scripps, which calculates numbers in slightly different ways based on time and average, said the May peak was 418.9.
In addition, the pandemic blockade slowed transportation, travel, and other activities by about 7%. Previous research Performance.But it was too small to make sense differenceCarbon dioxide can stay in the air for more than 1,000 years, so year-to-year changes in emissions are rarely recorded.
The 10-year average growth rate also set a record and now reaches 2.4ppm per year.
“It’s very unusual for carbon dioxide to increase this way in decades,” Tans said. “For example, when the Earth rose from the last ice age, carbon dioxide increased by about 80 ppm and the natural system Earth system took 6,000 years. We have seen significant increases in the last few decades.”
By comparison, only the same amount of carbon dioxide increased in the 42 years from 1979 to 2021.
Michael Oppenheimer, a climate scientist at Princeton University, did not participate in the study, but said, “The world is nearing the point where it is almost inevitable to go beyond the goals of Paris and enter the climate hazard zone. “.
(© Copyright 2021 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)
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