​Keeling Curve

  • Global average concentration of carbon dioxide (CO2) was 4.7 parts per million (ppm) in March 2024 (higher than March 2023), signifying large spike in Keeling Curve.
  • The Keeling Curve is a measurement of the concentration of carbon dioxide in the atmosphere made atop Hawaii’s Mauna Loa since 1958.
  • It is the longest-running such measurement in the world.
  • The Scripps CO2 program was initiated in 1956 by Charles David Keeling and operated under his direction until his death in 2005. ....
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