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Mauna Loa CO₂ hits 431.12 ppm, 2.1σ above recent average
Mar 16, 2026 — Apr 15, 2026 May 19, 2026
Atmospheric CO₂ at Mauna Loa reached 431.12 ppm on April 15, marking a notable deviation 2.1 standard deviations above the recent mean of 421.17 ppm. This reading stands out against the typical seasonal pattern we've observed. Concurrently, several economic indicators hit records: GDP grew 1.4% over 3 months, CPI reached an all-time high, and treasury yields surged 13.6%. Global temperature anomalies also increased 9.3% within the same period. The timing of this CO₂ spike alongside multiple economic records raises questions about whether these patterns reflect seasonal variations, measurement anomalies, or something worth investigating further.