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

Measurement Notes

Home Measurement Notes
  • Scripps CO2 Instrument at Mauna Loa Observatory Back in Action
    March 16, 2023
    Announcement, Daily Measurements, Keeling Curve History, Measurement Notes
    Helicopter delivers photovoltaic rails, electrical conduit, and solar panels to Mauna Loa Observatory. Photo: Scott...
    READ MORE
  • Update on CO2 readings commencing at Maunakea
    January 10, 2023
    Daily Measurements, Measurement Notes
    (Above: Ralph Keeling takes an air sample at Maunakea Dec. 21, 2022) The Keeling Curve data...
    Ralph Keeling takes an air sample at Maunakea
    READ MORE
  • Historic Keeling Curve Observation Interrupted by Volcanic Eruption
    November 29, 2022
    Announcement, Keeling Curve History, Measurement Notes
    Photo: NOAA   The carbon dioxide measurement equipment that maintains the famed Keeling Curve record lost power...
    READ MORE
  • Why COVID Didn’t Have a Bigger Effect on CO2 Emissions
    May 3, 2021
    Climate in the News, Measurement Notes
    Photo: Robert Labrecque The COVID-19 pandemic caused carbon dioxide (CO2) emissions from fossil fuels to drop...
    READ MORE
  • Statement from Scripps Oceanography, UK Met Office on Record High CO2 Buildup
    April 7, 2021
    Announcement, Climate in the News, Measurement Notes, Outreach
    Researchers Richard Betts from the UK Met Office Hadley Centre and Ralph Keeling of Scripps...
    READ MORE
  • Notice on revised CO2 scale
    March 9, 2021
    Measurement Notes
    As of February 21, 2021, the CO2 data from the Scripps CO2 program are reported...
    READ MORE
  • What does it take for the coronavirus (or other major economic events) to affect global carbon dioxide readings?
    November 18, 2020
    Climate in the News, Measurement Notes
    A downturn in global fossil fuel use has been prompted by curtailments of travel and...
    READ MORE
  • Carbon Dioxide Levels Hit Record Peak in May
    June 4, 2019
    Climate in the News, Keeling Curve History, Measurement Notes
    Monthly average surpassed 414 parts per million at Mauna Loa Observatory Atmospheric carbon dioxide continued its...
    READ MORE
  • Is the Current Rise in CO2 Definitely Caused by Human Activities?
    September 19, 2018
    Measurement Notes, Most Popular, Outreach, Paleoclimate
    A correspondent recently asked Keeling Curve researchers to settle a family disagreement about the cause...
    Image: Adi Khen/Scripps Oceanography
    READ MORE
  • Another Climate Milestone Falls at Mauna Loa Observatory
    June 7, 2018
    Daily Measurements, Keeling Curve History, Measurement Notes
    Peak carbon dioxide levels surpass 411 parts per million for May Carbon dioxide levels measured at...
    READ MORE
  • Carbon Dioxide in the Atmosphere Hits Record High Monthly Average
    May 2, 2018
    Daily Measurements, Measurement Notes
    April monthly average exceeds 410 parts per million for the first time in recorded history...
    READ MORE
  • Video: How Scientists Measure Carbon Dioxide
    April 12, 2018
    Keeling Curve History, Measurement Notes, Videos
    In honor of the 60th anniversary of the Keeling Curve, Ralph Keeling of the Scripps...
    READ MORE
  • Rising CO2 Leading to Changes in Land Plant Photosynthesis
    September 14, 2017
    Climate in the News, Measurement Notes
    Suggests that plants have achieved an optimum response to rising CO2 levels in the atmosphere Researchers...
    READ MORE
  • Note on Reaching the Annual Low Point
    September 23, 2016
    Daily Measurements, Measurement Notes
    We are now approaching the annual low point in the Mauna Loa CO2 curve, which...
    READ MORE
  • Brief Reprieve from 400 PPM Era May Be Thanks to a Hurricane
    August 31, 2016
    Climate in the News, Daily Measurements, Measurement Notes
    A hurricane bearing down on Hawaii prompted operators to shut down CO2 monitoring equipment at...
    READ MORE
  • Daily Readings Have Been Restored
    June 21, 2016
    Daily Measurements, Measurement Notes
    A failed disk that had prevented the reporting of daily readings was replaced on June 14...
    READ MORE
  • History
  • Measurement Notes
  • Videos
  • Other climate Indicators
Scripps Institution of Oceanography, UC San Diego | Log In