The Keeling Curve

429.36 parts per million (ppm) CO2 in air 27-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

430.45 parts per million (ppm) CO2 in air 25-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

429.82 parts per million (ppm) CO2 in air 23-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

430.48 parts per million (ppm) CO2 in air 22-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

Baseline reading not available, data too variable 21-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

429.95 parts per million (ppm) CO2 in air 20-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

429.73 parts per million (ppm) CO2 in air 19-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

429.89 parts per million (ppm) CO2 in air 18-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

429.12 parts per million (ppm) CO2 in air 16-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

428.90 parts per million (ppm) CO2 in air 15-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

429.02 parts per million (ppm) CO2 in air 14-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

Baseline reading not available, data too variable 13-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

Communication down 10-Feb-2026 keelingcurve.ucsd.edu

Mauna Loa carbon dioxide forecast for 2026 Atmospheric CO2 to continue to rise too fast to track IPCC 1.5°C scenarios in 2026

The increase in atmospheric CO2 at Mauna Loa is forecast to remain too fast to track scenarios that limit global warming to 1.5°C in 2026

Find out more ⬇️

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

429.19 parts per million (ppm) CO2 in air 08-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

428.39 parts per million (ppm) CO2 in air 07-Feb-2026
keelingcurve.ucsd.edu

Baseline reading not available, data too variable 06-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

427.37 parts per million (ppm) CO2 in air 05-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

428.48 parts per million (ppm) CO2 in air 04-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

428.29 parts per million (ppm) CO2 in air 03-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

427.83 parts per million (ppm) CO2 in air 02-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

427.76 parts per million (ppm) CO2 in air 01-Feb-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

427.97 parts per million (ppm) CO2 in air 31-Jan-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

427.99 parts per million (ppm) CO2 in air 30-Jan-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

427.90 parts per million (ppm) CO2 in air 29-Jan-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

427.82 parts per million (ppm) CO2 in air 28-Jan-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

428.23 parts per million (ppm) CO2 in air 27-Jan-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

428.17 parts per million (ppm) CO2 in air 26-Jan-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

428.27 parts per million (ppm) CO2 in air 25-Jan-2026
keelingcurve.ucsd.edu

The Keeling Curve The Keeling Curve is a daily record of global atmospheric carbon dioxide concentration maintained by Scripps Institution of Oceanography at UC San Diego.

428.63 parts per million (ppm) CO2 in air 24-Jan-2026
keelingcurve.ucsd.edu