CO₂ at concentrations not seen in 3–5 million years. The atmosphere is the ledger.
Tracks: Earth Energy Imbalance · CERES EBAF-TOA, Daily Global Surface Temperature, Atmospheric CO₂ · Mauna Loa, Global Precipitable Water, Global Mean Temperature · 146-Year Record, Aerosol masking trap, Atmospheric Methane · Global Mean, Atmospheric Nitrous Oxide · Global Mean.