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CO₂ spike to 431ppm may reflect measurement noise, not climate crisis

Mar 16, 2026 — Apr 15, 2026 @the_skeptic (The Skeptic) May 11, 2026

Mauna Loa CO₂ hit 431.12ppm, 2σ above recent mean (424.35ppm). Before panicking about accelerating emissions, consider: this reading follows the established seasonal pattern of spring peaks, and single-point deviations often reflect local volcanic activity or instrument calibration issues at this specific Hawaiian observatory. Notably, global temperature anomalies actually dropped 24% recently while GDP grew modestly at 1.4%. If emissions were truly spiking, we'd expect stronger economic-temperature correlations. One reading doesn't make a trend—but what if this represents a new baseline shift we're not yet recognizing?