In honor of the 60th anniversary of the Keeling Curve, Ralph Keeling of the Scripps CO2 Program shows how scientists make carbon dioxide measurements and gives a guided tour of the original instruments his father, Charles David Keeling, developed to start the famous record known as the Keeling Curve. In 2018, carbon dioxide levels are expected to exceed 410 parts per million (ppm) on a regular basis for the first time in human history. Sixty years earlier at the beginning of the records, CO2 levels were at 315 ppm.
March 29 marked the 60th anniversary of the Keeling Curve, a detailed record of carbon dioxide levels in the atmosphere produced by Scripps Institution of Oceanography at UC San Diego in concert with NOAA. Continue reading Keeling Curve 60th anniversary events kick off with NOVA Facebook live event
Scripps Oceanography teamed with Killer Infographics to create this brief animated introduction to the Keeling Curve.
Suggests that plants have achieved an optimum response to rising CO2 levels in the atmosphere Continue reading Rising CO2 Leading to Changes in Land Plant Photosynthesis
We are now approaching the annual low point in the Mauna Loa CO2 curve, which typically happens around the last week of September but varies slightly from year to year. Continue reading Note on Reaching the Annual Low Point
A hurricane bearing down on Hawaii prompted operators to shut down CO2 monitoring equipment at Mauna Loa Observatory on the Big Island. Continue reading Brief Reprieve from 400 PPM Era May Be Thanks to a Hurricane
A failed disk that had prevented the reporting of daily readings was replaced on June 14 and the system is now running normally. Continue reading Daily Readings Have Been Restored
Readings of CO2 from Mauna Loa have been unavailable for two weeks.
According to technicians with the Scripps CO2 Group, the problem is a disk failure that handles the data buffering, which has broken the data stream and valve switching that impacts daily calibration. The air data are recoverable, because the computer onboard the actual instrument is still working and taking air data, but we will need to assess the stability of calibration once the instrument is working completely again. A replacement was shipped last week, so it should be up again shortly.
– Robert Monroe
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: Continue reading Why Has a Drop in Global CO2 Emissions Not Caused CO2 Levels in the Atmosphere to Stabilize?