Record Atmospheric CO₂ Levels Measured at Mauna Loa Observatory

Record Atmospheric CO₂ Levels Measured at Mauna Loa Observatory

Atmospheric carbon dioxide levels were measured at NOAA's Mauna Loa Observatory in Hawaii County, United States, where the average concentration reached 431. 12 parts per million. This value set a new record high since measurements began in 1958, indicating a continuing upward trend in global CO₂ concentrations.

The record measurement highlights ongoing concerns about climate change and the increasing accumulation of greenhouse gases in the atmosphere. Scientists and organizations like NOAA continue to monitor these levels closely to understand their impact on global climate patterns and to inform policy and mitigation efforts.

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NOAA Mauna Loa Observatory Zachary Labe Climate Central

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Mauna Loa Observatory

Articles

May 06, 2026
1 total
Atmospheric CO₂ Levels Reach New High in April 2026
Atmospheric CO₂ Levels Reach New High in April 2026

Slashdot • 06 May 14:37

In April 2026, atmospheric carbon dioxide levels at NOAA's Mauna Loa Observatory averaged 431.12 parts per million, marking a new record high since measurements began in 1958.

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