In 2024, the yearly average level of the greenhouse gas carbon dioxide (CO2) rose faster over the prior year than ever before in the 67-year-old Keeling Curve record. When researchers took the average readings for all 12 months in 2024, the average was 3.58 parts per million (ppm) higher than for 2023’s average. That broke the record for largest jump … Read More
The Keeling Curve Hits 420 PPM
Levels of the greenhouse gas carbon dioxide eclipsed 420 parts per million for the first time in human history in 2021. Scripps Institution of Oceanography updated this animation, which explains the rise of carbon dioxide concentration in the atmosphere over the past 300 years and the measurement our researchers collect at Hawaii’s Mauna Loa, known as the Keeling Curve. When … Read More
Statement from Scripps Oceanography, UK Met Office on Record High CO2 Buildup
Researchers Richard Betts from the UK Met Office Hadley Centre and Ralph Keeling of Scripps Institution of Oceanography, UC San Diego issued the following statement today regarding new record levels of CO2 in the atmosphere in the context of the Covid-19 pandemic. The full text of the statement with graphics is available with graphics through this link and is included … Read More
Another Climate Milestone Falls at Mauna Loa Observatory
Peak carbon dioxide levels surpass 411 parts per million for May
New Keeling Curve Prize Inspired by Scripps Research Icon
Strategies sought to mitigate greenhouse gases
Record Annual Increase of Carbon Dioxide Observed for 2015
CO2 levels increasing at a faster rate than before
Is This the Last Year Below 400?
Leader of Keeling Curve measurement says temporary bump from El Niño could push atmospheric CO2 levels above symbolic threshold for good
American Chemical Society to Honor Keeling Curve in June 12 Ceremony
Scripps Oceanography lab monitoring atmospheric CO2 named National Historic Chemical Landmark
What Does This Number Mean?
Repost of April 2013 entry The Mauna Loa carbon dioxide (CO2) record, also known as the “Keeling Curve,” is the world’s longest unbroken record of atmospheric carbon dioxide concentrations.
A Keeling Curve Funding Update – April 2015
The Scripps Institution of Oceanography, UC San Diego O2 and CO2 programs have received funding from multiple sources that put these operations on a relatively secure footing for the next few years.