Climate is accumulating 4 Hiroshima atomic bombs worth of heat per second

The site presents the central claim that Earth's climate is accumulating energy at about 250 trillion joules per second - equivalent to detonating four Hiroshima bombs every second - and attributes this relentless heating to increased greenhouse gases from fossil fuel burning. That energy is measured by combining warming of the oceans, land, atmosphere and the energy used to melt ice; over recent decades roughly 90% of the absorbed heat has gone into the oceans. The summary cites concrete measures: ocean heat content increased by about 24 × 10^22 joules between 1955-2010, atmospheric temperatures have risen roughly 0.8°C over the past century (accounting for ~2% of total absorbed heat), and climate “fingerprints” such as upper-atmosphere cooling and declining 13C isotopes trace the extra CO2 to fossil fuel combustion.

The site explains how scientists obtain these numbers using ARGO floats (about 3,000 floats producing ~100,000 temperature/salinity profiles per year) and ship-based bathythermographs, and describes ocean layers (surface-700 m, 700-2000 m, below 2000 m) that are now warming. It warns that CO2 has risen from pre-industrial ~285 ppm to near 400 ppm and, at +2 ppm/year, will reach 450 ppm - associated with >2°C warming - around 2038. Expected impacts listed include ecosystem shifts and extinctions, threats to food and water, stronger storms, fires and floods, disease spread, and increased heat-related morbidity and mortality.