Climate Signal

12-month running mean of global-mean top-of-atmosphere net flux (toa_net_all_mon) — the rate the planet is accumulating heat, ~90% of it into the oceans. The trend is the signal: the 12-mo mean has risen roughly +0.4 W/m² per decade since 2001, the trend line nearly tripling across the record — but the line is noisy and NOT monotonic (it swings year to year, and the single-month-window record high was mid-2023, above the current value). NOTE: EBAF's absolute level is constrained to in-situ ocean heat content (Loeb et al.); the satellite fixes the TREND well but not the absolute magnitude independently — which is why the climb, not the height, is the honest reading. The Hiroshima framing is an editorial transform of the W/m² value, computed live.

Cos-latitude-weighted global mean 2m air temperature from ERA5 reanalysis, published directly by ECMWF/C3S via Climate Pulse. ~2-3 day publication lag is intrinsic to the product, not staleness (most recent day is typically PRELIMINARY, settling to FINAL a few days later). The absolute annual peak is a Northern-Hemisphere-summer (July) value — ~17.15 °C in 2024, the warmest day in the record. The headline above tracks a different, honest superlative: the warmest reading on record for its specific calendar date, which 2026 has been setting through spring — weeks before that summer peak.

The breath of the planet: CO₂ falls each Northern-Hemisphere summer as plants take up carbon, then rises through winter. The full Keeling Curve — unbroken since 1958 — shows the relentless upward trend and the accelerating pace of rise.