File:Mauna loa CO2 record scripps.png

Temporary Volcanic Interruption

• https://gml.noaa.gov/obop/mlo/

Measurements at the Mauna Loa Observatory stopped after the 2022 eruption of the Mauna Loa volcano, when lava flow crossed the access road and took out power lines to the facility. The observatory remains inaccessible by vehicle and without power from the local utility company.

Observatory staff has established limited solar power in four observatory buildings and restored approximately 33 percent of the measurements onsite, including the Global Monitoring Laboratory and Scripps critical CO2 records and other atmospheric measurements.

2024

CO2 measurements ...

July 2024: 425.55 ppm

July 2023: 421.83 ppm

2023

CO2 Measurements @Mauna Loa, Hawaii

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

• 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

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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Weather +

CO2 Levels Now in the Weather Reports

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

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

The Keeling Curve

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