Skip to content Skip to footer

As CO2 Levels Hit New High, Earth Experiences Its Hottest May on Record

Atmospheric carbon dioxide reached 417.1 parts per million last month along with record high global temperatures.

Protesters hold a section of a banner reading "Crisis" during a Fridays for future demonstration, a worldwide climate strike against governmental inaction towards climate breakdown and environmental pollution.

The Earth just experienced its hottest May on record, scientists said Friday — just a day after it was announced that atmospheric CO2 levels hit a new high.

Scientists at Europe’s Copernicus Climate Change Service (C3S) announced the temperature record Friday. The agency said that globally, last month 0.63°C warmer than the 1981-2020 average for May. That tops the previous warmest May, which occurred in 2016, by 0.05°C.

The last 12-month period, C3S added, was nearly 0.7°C warmer than average.

“The last month has been the warmest May on record globally and this is unquestionably an alarming sign,” Freja Vamborg, a scientist at C3S, told CNBC.

The agency added in its new findings:

Outside Europe, temperatures were most above average over parts of Siberia, where they were up to 10°C above average. They were also much above average over western Alaska, along the Andes bordering Chile and Argentina, and over regions in West and East Antarctica. It was also much warmer than average over western North America, the far north and south of South America, north-western, central and south-western Africa, and south-eastern Asia.

The “highly anomalous” temperatures in parts of Siberia follow a warmer than ever April for the Arctic and evidence of the emergence of so-called “zombie fires” — reignited fires from last year’s Arctic wildfires that continued to survive by smoldering underground.

The new data from European scientists follows NOAA’s Thursday announcement that atmospheric CO2 levels also hit new highs last month.

The levels recorded at the Mauna Loa Observatory show a seasonal peak of 417.1 parts per million in May, the highest monthly reading ever recorded.

Record high daily averages hit last month had already sparked urgent calls for bold climate action.

The trend of the planet-heating gas in the atmosphere is unmistakable.

“Progress in emissions reductions is not visible in the CO2 record,” Pieter Tans, senior scientist with NOAA’s Global Monitoring Laboratory, said in a statement. “We continue to commit our planet — for centuries or longer — to more global heating, sea level rise, and extreme weather events every year.”

The record atmospheric CO2 levels come as the global coronavirus pandemic has triggered global economic shutdowns, but the resulting emissions drops and pollution declines were not enough to budge CO2 levels.

Geochemist Ralph Keeling, who runs the Scripps Oceanography program at Mauna Loa, explained why, likening global emissions to “trash in a landfill.”

“People may be surprised to hear that the response to the coronavirus outbreak hasn’t done more to influence CO2 levels,” he said. “But the buildup of CO2 is a bit like trash in a landfill. As we keep emitting, it keeps piling up.”

“The crisis has slowed emissions, but not enough to show up perceptibly at Mauna Loa,” Keeling continued. “What will matter much more is the trajectory we take coming out of this situation.”

The new data comes as global policy makers mark World Environment Day, a moment United Nations Secretary-General António Guterres took to say, “To care for humanity, we MUST care for nature.”

“Climate disruption is getting worse,” Guterres said in his message, urging all parties to “commit to a green and resilient future.”

We’re not backing down in the face of Trump’s threats.

As Donald Trump is inaugurated a second time, independent media organizations are faced with urgent mandates: Tell the truth more loudly than ever before. Do that work even as our standard modes of distribution (such as social media platforms) are being manipulated and curtailed by forces of fascist repression and ruthless capitalism. Do that work even as journalism and journalists face targeted attacks, including from the government itself. And do that work in community, never forgetting that we’re not shouting into a faceless void – we’re reaching out to real people amid a life-threatening political climate.

Our task is formidable, and it requires us to ground ourselves in our principles, remind ourselves of our utility, dig in and commit.

As a dizzying number of corporate news organizations – either through need or greed – rush to implement new ways to further monetize their content, and others acquiesce to Trump’s wishes, now is a time for movement media-makers to double down on community-first models.

At Truthout, we are reaffirming our commitments on this front: We won’t run ads or have a paywall because we believe that everyone should have access to information, and that access should exist without barriers and free of distractions from craven corporate interests. We recognize the implications for democracy when information-seekers click a link only to find the article trapped behind a paywall or buried on a page with dozens of invasive ads. The laws of capitalism dictate an unending increase in monetization, and much of the media simply follows those laws. Truthout and many of our peers are dedicating ourselves to following other paths – a commitment which feels vital in a moment when corporations are evermore overtly embedded in government.

Over 80 percent of Truthout‘s funding comes from small individual donations from our community of readers, and the remaining 20 percent comes from a handful of social justice-oriented foundations. Over a third of our total budget is supported by recurring monthly donors, many of whom give because they want to help us keep Truthout barrier-free for everyone.

You can help by giving today. Whether you can make a small monthly donation or a larger gift, Truthout only works with your support.