Averages |
NOAA MLO |
Scripps MLO |
---|---|---|
Daily CO2 |
425.01 ppm Apr 28 2023 |
424.22 ppm** Apr 26 2023 |
Weekly CO2 |
424.64 ppm May 28 - Jun 3, 2023 |
423.95 ppm** April 23-29, 2023 data |
Monthly CO2 |
424.00 ppm May 2023 |
423.78 ppm** May 2023 |
Yearly CO2 |
418.56 ppm 2022 |
416.45 ppm 2021 |
* Mauna Loa record includes CO2 measurments at Maunakea site in 2022-2023
** All-time high in the Scripps measurements of CO2 at Mauna Loa
Marking the latest CO2 records is not an act of celebration, but of bearing witness.
The achievements are a sobering reminder of the chemical changes that we humans are collectively making to the atmosphere--changes with disruptive impacts that affect every living being in the biosphere. When a new record is reached, it is is marked here with an invitation for people to take notice, reflect on the transformation that is going in the wrong direction, and resolve to reverse these trends.
Reversing the trend is not something that any one person can achieve on their own. But individuals and groups can build on this CO2 Earth initiative by taking steps that help make the CO2 indicator for planetary health as ubiqutious as our stock market updates and weather reports. Consider sharing the CO2 Earth updates and records with people and groups that are part of your information-sharing circle.
A New Daily High Each Year
The graphic below from Teem Earth partner @NumberLens presents NOAA CO2 readings since 1999 to show the seasonal peak for daily CO2 readings at Mauna Loa. It shows that CO2 levels usually peak in April or May, a phenomena discovered by Charles David Keeling in the late 1950s and early 1960s when he began what became the world's longest-running, high preceision record of direct measurements of CO2 in background air.
*Atmospheric CO2 is higher now than at any time in the past 200,000 years of human history. In fact, studies of past CO2 levels have accumulated evidence of CO2 levels being lower than 400 ppm for the past 23 million years. That makes the CO2 records on this page the highest in human history plus a period that's a hundred times short 200,000-year time that homo sapiens have graced the earth. The higher levels of this planet-heating gas is just one part of the problem. The other is the speed of the changes, more than a hundred times pre-human times, and faster than many ecosystems can adapt to.
Related Links
Science Daily Jun 2020 | Today's atmospheric CO2 levels greater than 23 million-year record
Geology 2020 | A 23 m.y. record of low atmospheric CO2
CO2 Earth | Daily CO2
CO2 Earth | CO2 Proxy Data
CO2 Earth | CO2 Acceleration
CO2 Earth | Examples of CO2 Media Broadcasts
CO2 Earth | CO2 for Print
Daily
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Daily MLO CO2 Records
2023 New daily CO2 records
New all-time daily highs reached in 2023 for CO2 levels recorded at the Mauna Loa
425.01 ppm April 28, 2023 - NOAA | CO2 Earth Tw Ig
424.22 ppm April 26, 2023 - Scripps Tw
424.83 ppm April 17, 2023 - NOAA | CO2 Earth Tw
424.30 ppm April 15, 2023 - NOAA | CO2 Earth Tw
424.03 ppm April 16, 2023 - Scripps Tw | CO2 Earth Tw1 Tw2
423.84 ppm April 15, 2023 - Scripps Tw | CO2 Earth Tw
423.23 ppm April 12, 2023 - NOAA | CO2 Earth Tw & FB & Ig
423.06 ppm April 11, 2023 - NOAA | CO2 Earth Tw & FB
423.01 ppm April 6, 2023 - NOAA | CO2 Earth Tw >5 million views & FB | Article
422.88 ppm February 28, 2023 - NOAA
2022 New daily CO2 records
New all-time daily highs reached in 2022 for CO2 levels recorded at the Mauna Loa Observatory (MLO):
422.06 ppm April 26, 2022 - NOAA | CO2 Earth Tw & FB & Ig
421.59 ppm February 14, 2022 - NOAA | CO2 Earth Tw & Ig
2021 Daily CO2 records
421.36 ppm April 8, 2021 - NOAA | CO2 Earth Tw & FB & Ig
421.21 ppm April 3, 2021 - NOAA | CO2 Earth Tw & FB | April 7 statements: Met Office & Scripps | News:CBS | Bowen Tw
419.45 ppm February 5, 2021 - NOAA | CO2.Earth Tw & FB
419.37 ppm February 4, 2021 - NOAA [originally reported as 419.12 ppm on Feb 5, then revised Feb 6]
419.21 ppm February 4, 2021 - Scripps Tw
2020 Daily CO2 records
418.32 ppm June 1, 2020 - NOAA | CO2 Earth Tw | NumberLens Tw
418.12 ppm May 3, 2020 - NOAA | UNFCCC-TW | CO2 Earth Tw & FB
418.03 ppm May 1, 2020 - NOAA | CO2 Earth FB TW |Turkish
417.91 ppm April 9, 2020 | Scripps TW KC-TW
416.96 ppm April 8, 2020 | NOAA TW < 417.85 ppm April 9, 2020 | NOAA TW >
416.08 ppm February 10, 2020 | NOAA FB TW GT-TW yesilgazette [@CO2_Earth tweet of Feb. 11, 2020 + retweet by @GretaThunberg]
415.79 ppm January 21, 2020 | NOAA FB TW
* Highest Scripps MLO reading in 2020 is for May 25 at 418.04 ppm CO2 | KC-Tw
2019 DailyCO2 records
415.70 ppm May 15, 2019 | Scripps TW KC-TW
415.64 ppm May 15, 2019 | NOAA TW
415.50 ppm May 13, 2019 | Scripps TW KC-TW FML
415.40 ppm May 13, 2019 | NOAA TW
415.39 ppm May 12, 2019 | Scripps TW
415.27 ppm May 12, 2019 | NOAA TW
415.26 ppm May 11, 2019 | Scripps TW SA TC USN EH-TW
May 3, 2019: Tweet of May 4 record CO2 level above 415 corrected via FB TW @Keeling-TW
414.94 ppm May 1, 2019 | Scripps TW
414.88 ppm May 1, 2019 | NOAA TW Reddit
414.84 ppm March 18, 2019 | NOAA-ESRL TW
2018 Daily CO2 records
412.60 ppm May 14, 2018 | Scripps TW412.45 ppm May 14, 2018 | NOAA TW
412.37 ppm April 23, 2018 | NOAA TW
2017 Daily CO2 records
412.63 ppm April 26, 2017 | NOAA TW411.27 ppm May 15, 2017 | NOAA TW
2016 Daily CO2 records
409.44 ppm April 9, 2016 | Scripps PBS Opening Bell409.39 ppm April 8, 2016 | Scripps Opening Bell
2015 Daily CO2 record
404.84 ppm April 13, 2015 | Scripps GW
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Weekly
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Weekly CO2 Records
2023 Weekly CO2 records
New all-time weekly highs reached in 2023:
424.64 ppm May 28 - Jun 3, 2023 | NOAA data | CO2 Earth Ig
424.40 ppm April 23-29, 2023 | NOAA data | CO2 Earth Tw
423.65 ppm April 16-22, 2023 | NOAA data | CO2 Earth Tw
422.89 ppm April 9-15, 2023 | NOAA data | CO2 Earth Tw
422.60 ppm April 2-8, 2023 | NOAA data | CO2 Earth Tw
421.91 ppm Feb 26 - Mar 4, 2023 | NOAA data
2022 Weekly CO2 records
421.63 ppm May 29 - June 4, 2022 | NOAA data
421.46 ppm May 22 - 28, 2022 | NOAA data | CO2 Earth Tw
421.13 ppm May 8 - 14, 2022 | NOAA data | CO2 Earth Tw
420.37 ppm March 27 - April 2, 2022 | NOAA data | CO2 Earth Tw
2021 Weekly CO2 records
420.01 ppm April 25 - May 1, 2021 | NOAA data
419.28 ppm April 4 - 10, 2021 | NOAA data | WMO & CO2 Earth Tw
418.03 ppm March 28 - April 3, 2021 | NOAA data
417.97 ppm February 28 - March 6, 2021 | NOAA data
2020 Weekly CO2 records
417.43 ppm May 24-30, 2020 | NOAA data
416.97 ppm May 17-23, 2020 | NOAA data
416.83 ppm May 3 - 9, 2020 | NOAA data
416.82 ppm April 26 - May 2, 2020 | NOAA data
416.45 ppm April 5-11, 2020 | NOAA data
415.74 ppm March 29-April 4, 2020 | NOAA data
415.52 ppm March 22-28 2020 | NOAA data NL-TW
2019 Weekly CO2 records
415.39 ppm May 12-18, 2019 | NOAA data
415.08 ppm May 12-18, 2019 | Scripps data
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Monthly
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Monthly MLO CO2 Records
2023 Monthly CO2 records
424.00 ppm May 2023 | NOAA data
423.78 ppm May 2023 | Scripps data
423.36 ppm April 2023 | NOAA data
422.73 ppm April 2023 | Scripps data
2022 Monthly CO2 records
420.99 ppm May 2022 (and June 2022) | NOAA data | Scripps UCSD article
420.23 ppm April 2022 | NOAA data
419.28 ppm February 2022 | NOAA data
2021 Monthly CO2 records
419.13 ppm May 2021 | NOAA data
419.05 ppm April 2021 | NOAA data
417.64 ppm March 2021 | NOAA data
2020 Monthly CO2 records
417.16 ppm May 2020 | Scripps data KC-Tw
416.21 ppm April 2020 | NOAA data
416.18 ppm April 2020 | Scriipps data KC-Tw
2019 Monthly CO2 record
414.83 ppm May 2019 | Scripps data
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About
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About the 'CO2 Records' Page
CuratorMike McGee
Process
1. Human monitoring of data
2. Human updates to this page
3. Human tweets and posts via social media
4. Human prayer for the end of new record hights for atmospheric CO2
5. Repeat (as long as needed)
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Other Records
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Other Records
Feb. 9, 2020 | Antarctica’s first-ever recording of temperature above 20°C [Guardian]
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