The Earth's CO2 Levels Are Increasing Faster Than Ever

Slashdot -  "Atmospheric levels of planet-warming carbon dioxide aren't just on their way to yet another record high this year," reports the Washington Post. "They're rising faster than ever, according to the latest in a 66-year-long series of observations." Carbon dioxide levels were 4.7 parts per million higher in March than they were a year earlier, the largest annual leap ever measured at the National Oceanic Atmospheric Administration laboratory atop a volcano on Hawaii's Big Island. And from January through April, CO2 concentrations increased faster than they have in the first four months of any other year... For decades, CO2 concentrations at Mauna Loa in the month of May have broken previous records. But the recent acceleration in atmospheric CO2, surpassing a record-setting increase observed in 2016, is perhaps a more ominous signal of failing efforts to reduce global greenhouse gas emissions and the damage they cause to Earth's climate. "Not only is CO2 still rising in the atmosphere — it's increasing faster and faster," said Arlyn Andrews, a climate scientist at NOAA's Global Monitoring Laboratory in Boulder, Colorado. A historically strong El Niño climate pattern that developed last year is a big reason for the spike. But the weather pattern only punctuated an existing trend in which global carbon emissions are rising even as U.S. emissions have declined and the growth in global emissions has slowed. The spike is "not surprising," said Ralph Keeling, director of the CO2 Program at Scripps Institution, "because we're also burning more fossil fuel than ever...."

El Niño-linked droughts in tropical areas including Indonesia and northern South America mean less carbon storage within plants, Keeling said. Land-based ecosystems around the world tend to give off more carbon dioxide during El Niño because of the changes in precipitation and temperature the weather pattern brings, Andrews added. And for CO2 concentrations to fall back below 400 parts per million, it would take more than two centuries even if emissions dropped close to zero by the end of this century, she added.
This year's reading "is more than 50 percent above preindustrial levels and the highest in at least 4.3 million years, according to NOAA."