Climate Data Explorer
Historical indicators from NOAA, NASA and Our World in Data — bundled offline with interactive charts and trend statistics.
Atmospheric CO₂ concentration
Annual mean carbon dioxide concentration measured at Mauna Loa Observatory — the longest continuous record of greenhouse gas accumulation.
Latest (2024)
424.61
Total change
+108.7
Across selected range
Trend per decade
+16.76
Linear regression slope ×10
Min / Max
315.94 / 424.61
Peak in 2024
Source
NOAA Global Monitoring Laboratory (sample) — sample values for demonstration. Full records: https://gml.noaa.gov/ccgg/trends/