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
Is the Current Rise in CO2 Definitely Caused by Human Activities?
A correspondent recently asked Keeling Curve researchers to settle a family disagreement about the cause of rising CO2 levels in the atmosphere and whether the current trend is natural or human-caused. Scripps geochemist Ralph Keeling provided the following answer:
Video: New Animation of Keeling Curve Available
Scripps Oceanography teamed with Killer Infographics to create this brief animated introduction to the Keeling Curve.
Why Has a Drop in Global CO2 Emissions Not Caused CO2 Levels in the Atmosphere to Stabilize?
Note: Readers have asked why there has been no stabilization in the measured levels of the greenhouse gas carbon dioxide in the atmosphere when reported emissions of CO2 have fallen. Scripps CO2 Group Director Ralph Keeling gave this response: