Following energy, carbon and observations — Earth & Space Science

Earth receives sunlight, reflects some and absorbs some. Its warmed surface emits infrared radiation. Atmospheric gases absorb and emit at particular wavelengths, changing exchanges with the surface and space; they are not a solid lid that prevents all energy escaping. Ocean storage and circulation influence how the response unfolds across places and time.

Carbon reservoirs and transfer rates describe different quantities. Combustion can move long-stored geological carbon into faster exchanges, while ocean uptake changes dissolved chemistry. Acidification names a decrease in pH even when the water remains above seven. A feedback must include a return effect on the initial change, and positive describes amplification rather than benefit.

The NASA GISTEMP historical plot in the climate-evidence unit uses every selected annual Land–Ocean entry from 1970 through 2024 and a 1951–1980 baseline. These are observational-analysis estimates, distinct from the deliberately invented future scenario curves. One local cold day, a global annual anomaly and a conditional projection are different kinds and scales of information.

Read the baseline and interval before calculating a trend, and inspect complete selected records rather than an endpoint chosen to suggest every year changes the same way. Use multiple indicators and physically plausible mechanisms for attribution. In the chapter budget model, changing net transfer rates changes the store even when material remains conserved across a properly defined boundary.