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Tracking the CO2, Tracking the Atmospheric Change

About the Mauna Loa CO2 Observatory

• https://gml.noaa.gov/obop/mlo/aboutus/aboutus.html

2024

Monthly Average Mauna Loa CO2

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July 2024: 425.55 ppm

July 2023: 421.83 ppm

The Keeling Curve

The Keeling Curve: Watch It!

Keeling's Curve has been called one of the most important scientific works of the 20th century

Scripps CO2 measurements at Mauna Loa have been supported for many years by the U.S. Department of Energy (DOE), and have more recently been supplemented by Earth Networks, a technology company collaborating with Scripps to expand the global GHG monitoring network. Support for website development was provided in part by the National Science Foundation (NSF).

2022

2021

Mauna Loa, Hawaii - NOAA

• https://keelingcurve.ucsd.edu/
• https://www.esrl.noaa.gov/gmd/ccgg/trends/

2020

CO2 Measurements @Mauna Loa, Hawaii

• https://www.esrl.noaa.gov/gmd/ccgg/trends/

• https://www.esrl.noaa.gov/gmd/ccgg/trends/full.html

• https://scripps.ucsd.edu/programs/keelingcurve/

Highest Daily CO2 Records (by year) | Mauna Loa Observatory

Measurements are made by two independent CO2 monitoring programs (NOAA and Scripps) at the Mauna Loa Observatory in Hawaii about 3400 metres above sea level.

2019 (as of January 12, 2019)

413.45 ppm on January 12, 2019 (NOAA-ESRL)

411.14 ppm on January 7, 2019 (Scripps)

411.08 ppm on January 6, 2019 (Scripps)

2018

412.60 ppm on May 14, 2018 (Scripps)

412.45 ppm on May 14, 2018 (NOAA-ESRL)

412.37 ppm on April 23, 2018 (NOAA-ESRL)

2017

412.63 ppm on April 26, 2017 (NOAA-ESRL)

411.27 ppm on May 15, 2017 (NOAA-ESRL)

2016

409.44 ppm on April 9, 2016 (Scripps)

409.39 ppm on April 8, 2016 (Scripps)

2015

404.84 ppm on April 13, 2015 (Scripps)

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CO2