CO₂ kept climbing: Mauna Loa

Name: CO₂ kept climbing: Mauna Loa
Uploaded: 2026-10-16T00:24:18Z
Description: 67 annual CO₂ readings, 1959–2025. Concentration, not emissions. Maunakea observations temporarily replace Mauna Loa in 2022–2023; values may be revised. Movement between years is interpolated. The labeled chart scale starts at 300 ppm.

67 annual CO₂ readings, 1959–2025. Concentration, not emissions. Maunakea observations temporarily replace Mauna Loa in 2022–2023; values may be revised. Movement between years is interpolated. The labeled chart scale starts at 300 ppm.

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About this chart

CO₂ concentration · ppm · 1959–2025 · 67 annual means

Sources, method and credits

NOAA GML / Scripps · Mauna Loa annual mean CO₂; Lan, Tans & Thoning. Temporary Maunakea observations: Dec 2022–4 Jul 2023.

Data: freely available with citation · Photo: NOAA GML, public domain. No NOAA endorsement.

Original data source