New Record for Annual Increase in Keeling Curve Readings
January 17, 2025
In 2024, the yearly average level of the greenhouse gas carbon dioxide (CO2) rose faster...
Note on recent increased day-to-day variability
August 1, 2024
An observer of Keeling Curve data queried last week why there's such a spread in...
Largest Year–Over-Year Gain in Keeling Curve Set in March
May 8, 2024
Image: Adi Khen/Scripps Oceanography
New record for largest 12-month gain in carbon dioxide concentration ever observed
The...
On This Week’s Record High CO2 Readings at Mauna Loa
February 10, 2024
Mauna Loa Observatory. Photo: NOAA
On Saturday, Feb. 3, the daily Keeling Curve record was broken...
Improved Model of the Carbon Cycle Can Help Verify Reported Emissions
August 22, 2023
Researchers at UC San Diego’s Scripps Institution of Oceanography have created a more accurate model...
Scripps CO2 Instrument at Mauna Loa Observatory Back in Action
March 16, 2023
Helicopter delivers photovoltaic rails, electrical conduit, and solar panels to Mauna Loa Observatory. Photo: Scott...
Update on CO2 readings commencing at Maunakea
January 10, 2023
(Above: Ralph Keeling takes an air sample at Maunakea Dec. 21, 2022)
The Keeling Curve data...
Historic Keeling Curve Observation Interrupted by Volcanic Eruption
November 29, 2022
Photo: NOAA
The carbon dioxide measurement equipment that maintains the famed Keeling Curve record lost power...
Why COVID Didn’t Have a Bigger Effect on CO2 Emissions
May 3, 2021
Photo: Robert Labrecque
The COVID-19 pandemic caused carbon dioxide (CO2) emissions from fossil fuels to drop...
Statement from Scripps Oceanography, UK Met Office on Record High CO2 Buildup
April 7, 2021
Researchers Richard Betts from the UK Met Office Hadley Centre and Ralph Keeling of Scripps...
Notice on revised CO2 scale
March 9, 2021
As of February 21, 2021, the CO2 data from the Scripps CO2 program are reported...
What does it take for the coronavirus (or other major economic events) to affect global carbon dioxide readings?
November 18, 2020
A downturn in global fossil fuel use has been prompted by curtailments of travel and...
Carbon Dioxide Levels Hit Record Peak in May
June 4, 2019
Monthly average surpassed 414 parts per million at Mauna Loa Observatory
Atmospheric carbon dioxide continued its...
Is the Current Rise in CO2 Definitely Caused by Human Activities?
September 19, 2018
A correspondent recently asked Keeling Curve researchers to settle a family disagreement about the cause...
Another Climate Milestone Falls at Mauna Loa Observatory
June 7, 2018
Peak carbon dioxide levels surpass 411 parts per million for May
Carbon dioxide levels measured at...
Carbon Dioxide in the Atmosphere Hits Record High Monthly Average
May 2, 2018
April monthly average exceeds 410 parts per million for the first time in recorded history...
