Monthly Atmospheric Carbon Dioxide in October 2026?
Chart
Outcomes
Rules
The National Oceanic and Atmospheric Administration (NOAA) publishes the deciding data in its monthly "Trends in Atmospheric Carbon Dioxide, Mauna Loa" report. The deciding value is the atmospheric carbon dioxide concentration at Mauna Loa for October 2026, in parts per million (ppm), and the outcome is Yes if it is greater than the value specified in the market question and No otherwise. The value becomes final when NOAA publishes that report, by 8:00 AM CT on the fifth day of the month after October 2026, and early resolution does not apply. If NOAA delays the report, resolution waits until it is published.
About
Atmospheric carbon dioxide concentration is the amount of carbon dioxide in the air, expressed in parts per million (ppm). The event is the average concentration of carbon dioxide in the atmosphere over October 2026 as measured at Mauna Loa in Hawaii.
