Latest news with #KeelingCurve
CBC
a day ago
- Science
- CBC
CO2 levels just broke another record. Here's what that means
Social Sharing When man first walked on the moon, the carbon dioxide concentration in Earth's atmosphere was 325 parts per million (ppm). By 9/11, it was 369 ppm, and when COVID-19 shut down normal life in 2020, it had shot up to 414 parts ppm. This week, our planet hit the highest levels ever directly recorded: 430 parts per million. For 67 years, the observatory on Hawaii's Mauna Loa volcano has been taking these measurements daily — tracking the invisible gas that is building up in our atmosphere and changing life on Earth. The record is known as the Keeling Curve. Charles David Keeling began those recordings, some of the first in the world to measure CO2 concentration over time. His son, Ralph Keeling, born one year before the observatory opened, has witnessed the rapid increase firsthand over his lifetime. "I was a teenager when I first started to appreciate what my father was doing and how it might be significant," Keeling told CBC News. Back then it was around 330 ppm. Keeling, a geochemistry professor at Scripps Institution of Oceanography at the University of California, San Diego, took over the research once his father passed away in 2005. "This problem is not going away, and we're moving further and further into uncharted territory, and almost certainly, very dangerous territory." Why CO2 matters The build up of carbon dioxide in the atmosphere isn't visible to the naked eye, but its concentration matters because of the greenhouse effect. Like the glass walls that trap heat from the sun in an actual greenhouse, gases in our atmosphere such as CO2 and methane also trap heat from the sun. At the start of the Industrial Revolution, ice core samples show CO2 levels were around 280 parts per million but as they rose, warming has increased by about 1.3 C over the pre-industrial average. That's led to rising temperatures and leading to more frequent and extreme weather, like heat waves, floods, wildfires and droughts. While many have heard about the goals of limiting warming to 1.5 C or 2 C above pre-industrial levels, there have also been efforts to return CO2 levels to below 350 parts per million, as a key part of limiting the damage from climate change. The record highs have continued though. Just in the last year, CO2 readings from May have increased more than three parts per million — that many more molecules of CO2 trapping heat and contributing to warming. "We know why it's rising faster than ever, it's because we're burning more fossil fuels each year," said Keeling. Direct link to fossil fuels Damon Matthews, a climate scientist and professor at Concordia University in Quebec, also says he's concerned and isn't surprised that there are new records every year. "If we want to actually stabilize CO2 levels in the atmosphere, we would need to cut global emissions by more than 50 per cent, and we're nowhere near doing that," he said, adding that there are other gases at play but CO2 is the dominant influence. "Every May, we're going to see a new record of atmospheric CO2, until we actually make a lot more progress on climate mitigation than we have today." The annual cycle, peaking in late spring in the northern hemisphere, is tied to plant photosynthesis — CO2 concentrations drop in the summer as plants absorb the gas and release oxygen. In 2021, the International Energy Agency said that if the world wants to limit global warming and reach net-zero by 2050, there could be no new coal, oil or gas projects. Matthews is part of Canada's net-zero advisory body and says he's seen some progress in decreasing CO2 emissions the last few years, but not enough. He says Europe's emissions have been going down for decades, and that last year CO2 emissions in China didn't increase. However, he says Canada still lags behind other countries, and the U.S. is trending the other way. "There's lots of policy options, certainly focusing on expanding the oil and gas industry in Canada right now is not going to get us where we need to go in terms of climate," he said. "We just need to stop arguing about whether it's a priority and start doing the things that we know will help to solve the problem."
Yahoo
3 days ago
- Politics
- Yahoo
Carbon dioxide levels usually peak in May, but 2025's reading was like no other
An observatory high on Hawaii's Mauna Loa volcano that measures carbon dioxide in the atmosphere has reported its highest ever seasonal peak concentration of the greenhouse gas. For the first time, the May average exceeded 430 parts per million, reported scientists from the National Oceanic and Atmospheric Administration's Mauna Loa Observatory and the Scripps Institution of Oceanography at the University of California San Diego. "Another year, another record," said Ralph Keeling, director of the Scripps CO2 Program. "It's sad." Carbon dioxide and other gases function like a blanket around the Earth, holding in heat and warming the atmosphere above the surface, scientists say. A broad consensus of international scientists say the rise in carbon dioxide concentrations is responsible for the globe's changing climate, helping to make natural weather events such as rainfall, drought and heat waves more extreme. While carbon dioxide is naturally present in Earth's atmosphere, scientists say the problem is the rate at which it's increasing, driven by fossil fuel emissions. Geoscientists at the University of Utah, who participated in a 2023 study with more than 90 scientists in 16 countries, previously stated that CO2 levels in the atmosphere are higher than they've been in human history and highest in at least 14 million years. Climate change policy: Shifting rapidly under Trump administration Last year, the average level of carbon dioxide rose faster over the previous year than at any other point since the recordings began, Scripps reported in January. The average readings for the 12 months was 3.58 parts per million higher than the previous year's average, breaking a record set in 2016. In both years, the climate pattern El Niño played a role, Keeling said in January. "Although this El Niño event ended early in 2024, it is often the case that El Niño events are associated with higher than normal CO2 growth extending into the northern hemisphere summer following the El Niño event." The historic 67-year-old laboratory at elevation 11,141 feet is the global benchmark location for monitoring carbon dioxide in the atmosphere. Its measurements represent the average state of the atmosphere in the northern hemisphere. Scripps scientist Charles David Keeling, Ralph Keeling's father, began monitoring CO2 concentrations there in 1958. He was the first to realize CO2 levels peak in May in the northern hemisphere, fall during the growing season and rise again after plants die in the fall, according to Scripps. The fluctuations were presented in a record that became known as the Keeling Curve, which demonstrated carbon dioxide concentrations in the atmosphere were increasing every year. NOAA initiated daily measurements at Mauna Loa in 1974 and has maintained a complementary, independent measurement record ever since. A global network that includes NOAA and Scripps, forms a dataset used by climate scientists internationally. Eruptions at Mauna Loa caused an interruption to power at the observatory in 2022, NOAA said. Scientists established a temporary measurement site at Mauna Kea nearby. Dinah Voyles Pulver, a national correspondent for USA TODAY, covers climate change, wildlife and the environment. Reach her at dpulver@ or @dinahvp on Bluesky or X or dinahvp.77 on Signal. This article originally appeared on USA TODAY: Carbon dioxide levels hit new record in May Mauna Loa observation
Yahoo
3 days ago
- Science
- Yahoo
Earth's atmosphere hasn't had this much CO2 in millions of years
Earth's atmosphere now has more carbon dioxide in it than it has in millions — and possibly tens of millions — of years, according to data released Thursday by the National Oceanic and Atmospheric Administration and scientists at the University of California San Diego. For the first time, global average concentrations of carbon dioxide, a greenhouse gas emitted as a byproduct of burning fossil fuels, exceeded 430 parts per million (ppm) in May. The new readings were a record high and represented an increase of more than 3 ppm over last year. The measurements indicate that countries are not doing enough to limit greenhouse gas emissions and reverse the steady buildup of C02, which climate scientists point to as the main culprit for global warming. 'Another year, another record,' Ralph Keeling, a professor of climate sciences, marine chemistry and geochemistry at UC San Diego's Scripps Institution of Oceanography, said in a statement. 'It's sad.' Carbon dioxide, like other greenhouse gases, traps heat from the sun and can remain in the atmosphere for centuries. As such, high concentrations of greenhouse gases in the atmosphere contribute to higher global temperatures and other negative consequences of climate change, including rising sea levels, melting polar ice, and more frequent and severe extreme weather events. Atmospheric carbon dioxide has risen sharply since preindustrial times, owing mostly to human activities that pump greenhouse gases into the air. Decades ago, crossing the 400 ppm threshold was unthinkable. That meant that for every 1 million molecules of gas in the atmosphere, more than 400 were carbon dioxide. The planet hit that grim milestone in 2013. And now, scientists have warned that levels of CO2 could reach 500 ppm within 30 years. But human society is already in uncharted territory. The last time the planet had such high levels of carbon dioxide in the atmosphere was likely more than 30 million years ago, Keeling said, long before humans roamed Earth and during a time when the climate was vastly different. He said it's alarming not only how high CO2 levels have climbed, but also how quickly. 'It's changing so fast,' he told NBC News. 'If humans had evolved in such a high-CO2 world, there would probably be places where we wouldn't be living now. We probably could have adapted to such a world, but we built our society and a civilization around yesterday's climate.' Carbon dioxide levels are typically represented on a graph known as the Keeling Curve, named for Keeling's father, Charles David Keeling, who began taking daily measurements of atmospheric carbon dioxide in 1958 with instruments atop the Mauna Loa Observatory in Hawaii. The Keeling Curve famously shows a steep climb since the Industrial Revolution, owing to human-caused climate change. Ralph Keeling and his colleagues at the Scripps Institution of Oceanography found that average concentrations of atmospheric CO2 in May were 430.2 ppm. NOAA's Global Monitoring Laboratory, which has conducted separate daily readings since 1974, reported an average of 430.5 ppm in May. Carbon dioxide levels in the atmosphere are closely monitored to gauge how much humans are influencing Earth's climate. The readings are also an indicator of the planet's overall health. 'They're telling you about your whole system health with a single-point measurement,' Keeling said. 'We're getting a holistic measurement of the atmosphere from really a kind of simple set of measurements.' This article was originally published on
NBC News
3 days ago
- Science
- NBC News
Earth's atmosphere hasn't had this much CO2 in millions of years
Earth's atmosphere now has more carbon dioxide in it than it has in millions — and possibly tens of millions — of years, according to data released Thursday by the National Oceanic and Atmospheric Administration and scientists at the University of California San Diego. For the first time, global average concentrations of carbon dioxide, a greenhouse gas emitted as a byproduct of burning fossil fuels, exceeded 430 parts per million (ppm) in May. The new readings were a record high and represented an increase of more than 3 ppm over last year. The measurements indicate that countries are not doing enough to limit greenhouse gas emissions and reverse the steady buildup of C02, which climate scientists point to as the main culprit for global warming. 'Another year, another record,' Ralph Keeling, a professor of climate sciences, marine chemistry and geochemistry at UC San Diego's Scripps Institution of Oceanography, said in a statement. 'It's sad.' Carbon dioxide, like other greenhouse gases, traps heat from the sun and can remain in the atmosphere for centuries. As such, high concentrations of greenhouse gases in the atmosphere contribute to higher global temperatures and other negative consequences of climate change, including rising sea levels, melting polar ice, and more frequent and severe extreme weather events. Atmospheric carbon dioxide has risen sharply since preindustrial times, owing mostly to human activities that pump greenhouse gases into the air. Decades ago, crossing the 400 ppm threshold was unthinkable. That meant that for every 1 million molecules of gas in the atmosphere, more than 400 were carbon dioxide. The planet hit that grim milestone in 2013. And now, scientists have warned that levels of CO2 could reach 500 ppm within 30 years. But human society is already in uncharted territory. The last time the planet had such high levels of carbon dioxide in the atmosphere was likely more than 30 million years ago, Keeling said, long before humans roamed Earth and during a time when the climate was vastly different. He said it's alarming not only how high CO2 levels have climbed, but also how quickly. 'It's changing so fast,' he told NBC News. 'If humans had evolved in such a high-CO2 world, there would probably be places where we wouldn't be living now. We probably could have adapted to such a world, but we built our society and a civilization around yesterday's climate.' Carbon dioxide levels are typically represented on a graph known as the Keeling Curve, named for Keeling's father, Charles David Keeling, who began taking daily measurements of atmospheric carbon dioxide in 1958 with instruments atop the Mauna Loa Observatory in Hawaii. The Keeling Curve famously shows a steep climb since the Industrial Revolution, owing to human-caused climate change. Ralph Keeling and his colleagues at the Scripps Institution of Oceanography found that average concentrations of atmospheric CO2 in May were 430.2 ppm. NOAA's Global Monitoring Laboratory, which has conducted separate daily readings since 1974, reported an average of 430.5 ppm in May. Carbon dioxide levels in the atmosphere are closely monitored to gauge how much humans are influencing Earth's climate. The readings are also an indicator of the planet's overall health. 'They're telling you about your whole system health with a single-point measurement,' Keeling said. 'We're getting a holistic measurement of the atmosphere from really a kind of simple set of measurements.'
USA Today
3 days ago
- Science
- USA Today
Carbon dioxide levels usually peak in May, but 2025's reading was like no other
Carbon dioxide levels usually peak in May, but 2025's reading was like no other Show Caption Hide Caption How President Trump impacted climate change policy so far Since taking office, President Trump has abandoned efforts to reduce global warming. It could 'take a generation or more to repair the damage." An observatory high on Hawaii's Mauna Loa volcano that measures carbon dioxide in the atmosphere has reported its highest ever seasonal peak concentration of the greenhouse gas. For the first time, the May average exceeded 430 parts per million, reported scientists from the National Oceanic and Atmospheric Administration's Mauna Loa Observatory and the Scripps Institution of Oceanography at the University of California San Diego. "Another year, another record," said Ralph Keeling, director of the Scripps CO2 Program. "It's sad." Carbon dioxide and other gases function like a blanket around the Earth, holding in heat and warming the atmosphere above the surface, scientists say. A broad consensus of international scientists say the rise in carbon dioxide concentrations is responsible for the globe's changing climate, helping to make natural weather events such as rainfall, drought and heat waves more extreme. While carbon dioxide is naturally present in Earth's atmosphere, scientists say the problem is the rate at which it's increasing, driven by fossil fuel emissions. Geoscientists at the University of Utah, who participated in a 2023 study with more than 90 scientists in 16 countries, previously stated that CO2 levels in the atmosphere are higher than they've been in human history and highest in at least 14 million years. Climate change policy: Shifting rapidly under Trump administration Last year, the average level of carbon dioxide rose faster over the previous year than at any other point since the recordings began, Scripps reported in January. The average readings for the 12 months was 3.58 parts per million higher than the previous year's average, breaking a record set in 2016. In both years, the climate pattern El Niño played a role, Keeling said in January. "Although this El Niño event ended early in 2024, it is often the case that El Niño events are associated with higher than normal CO2 growth extending into the northern hemisphere summer following the El Niño event." The historic 67-year-old laboratory at elevation 11,141 feet is the global benchmark location for monitoring carbon dioxide in the atmosphere. Its measurements represent the average state of the atmosphere in the northern hemisphere. Scripps scientist Charles David Keeling, Ralph Keeling's father, began monitoring CO2 concentrations there in 1958. He was the first to realize CO2 levels peak in May in the northern hemisphere, fall during the growing season and rise again after plants die in the fall, according to Scripps. The fluctuations were presented in a record that became known as the Keeling Curve, which demonstrated carbon dioxide concentrations in the atmosphere were increasing every year. NOAA initiated daily measurements at Mauna Loa in 1974 and has maintained a complementary, independent measurement record ever since. A global network that includes NOAA and Scripps, forms a dataset used by climate scientists internationally. Eruptions at Mauna Loa caused an interruption to power at the observatory in 2022, NOAA said. Scientists established a temporary measurement site at Mauna Kea nearby. Dinah Voyles Pulver, a national correspondent for USA TODAY, covers climate change, wildlife and the environment. Reach her at dpulver@ or @dinahvp on Bluesky or X or dinahvp.77 on Signal.
