The Keeling Curve Navigation
  • History
  • Measurement Notes
  • Videos
  • Other climate Indicators
  • Search
  • History
  • Measurement Notes
  • Videos
  • Other climate Indicators
  • Search

Category Archive

Home The Blog Paleoclimate

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:

New Study Shows Three Abrupt Pulses of CO2 during Last Deglaciation

Rob MonroeOctober 29, 2014Paleoclimate

Breakthrough after field project collects richly detailed ice core records from Antarctica

How do CO2 levels relate to ice ages and sea-level?

Rob MonroeJune 20, 2014Paleoclimate

In a recent comment, a reader posted a graphic in which CO2 and sea-level rise appear to be correlated throughout the last 700,000 years.

How are ice-core data and Mauna Loa atmospheric data made comparable?

Rob MonroeMarch 20, 2014Measurement Notes, Paleoclimate

  Some readers of the Keeling Curve website have asked us about the graphs that show carbon dioxide concentrations since 1700 and over the past 800,000 years, which use a combination of data derived from analysis of the gas contained in ice cores and that obtained from air sampled at Mauna Loa Observatory in Hawaii.

What Does 400 ppm Look Like?

Rob MonroeDecember 3, 2013Paleoclimate

  As atmospheric carbon dioxide levels rise, scientists look back four million years for answers on what to expect from climate

  • History
  • Measurement Notes
  • Videos
  • Other climate Indicators
Scripps Institution of Oceanography, UC San Diego | Log In