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Is the Current Rise in CO2 Definitely Caused by Human Activities?

Rob MonroeSeptember 19, 2018Measurement Notes, Most Popular, Outreach, Paleoclimate

Image: Adi Khen/Scripps Oceanography

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

Rob MonroeOctober 19, 2017Most Popular, Videos

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?

Rob MonroeMay 23, 2016Climate in the News, Measurement Notes, Most Popular

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:

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