Start with the record.
Annual global land–ocean anomalies from NASA GISTEMP v4, relative to its 1951–1980 mean. The last complete year in this snapshot is 2025.
Open NASA source ↗ OPEN CLIMATE SCENARIO LAB / 001
See the other
path.
Change emissions assumptions. Watch the temperature paths diverge. Inspect the model, the source data, and what this experiment leaves out.
Enter the instrument ↓Moves Path B in the instrument below
PATH A / REFERENCE
PATH B / YOUR INPUT
51°30′N / 00°07′W
ONE EARTH · MANY ASSUMPTIONS
ONE EARTH · MANY ASSUMPTIONS
01 OBSERVED ANCHOR · NASA GISTEMP v402 EXPLICIT CO₂ PATHS03 INSPECTABLE MODEL SWEEPIllustrative experiment, not a forecast
THE INSTRUMENT / EXPERIMENT 001
Move one assumption.
See what follows.
Path A is a fixed comparison. Shape Path B by moving the three points below. The chart reruns instantly in your browser.
02 / BRANCH READOUT1951–80 BASELINE · °C
GLOBAL TEMPERATURE ANOMALY
One record. Two paths.
OBSERVED PATH A PATH B
PATH A · 2100—°C anomaly
PATH B · 2100—°C anomaly
PATH B RANGE—illustrative sensitivity sweep
Observed line: NASA GISTEMP v4 annual values. Future paths: transparent CO₂-only teaching model. Shaded band varies response coefficient; it is not a probability interval.
03 / SHOW THE WORKNothing hidden
Nothing hidden
behind the curve.
A useful experiment names its source, its equation, and its omissions. Every number above can be regenerated from the exported inputs.
Expose the rule.
Each year adds annual CO₂ emissions × a response coefficient / 1,000 to the 2025 anchor. v0.1 uses 0.45°C and v0.2 uses 0.50°C per 1,000 GtCO₂.
Read model ledger ↓Keep the uncertainty visible.
The band repeats Path B at 0.30 and 0.60°C per 1,000 GtCO₂. It is a parameter sweep, not a calibrated 5–95% interval.
Why emulators differ ↗04 / OPEN LEDGER
Read the small print.
Versioned assumptions belong beside the result, not behind an information icon.
DATA SNAPSHOTNASA GISTEMP v4 / annual global land–ocean / 1980–2025
BRANCH ANCHOR2025 anomaly: +1.19°C against 1951–1980
PATH A40 GtCO₂/yr in 2025 → 35 in 2030 → 30 in 2050 → 20 in 2100
MODEL VERSIONSv0.1 = 0.45°C / 1,000 GtCO₂ · v0.2 = 0.50°C / 1,000 GtCO₂
ERROR / LIMITSNo non-CO₂ forcing, aerosols, carbon-cycle feedback, removal accounting, regional effects or validated hindcast
INTERPRETATIONIllustrative comparison only; neither path is an IPCC scenario or a climate forecast
05 / NETWORK IDEA
Keep the experiments
open to challenge.
Elseearth’s proposed token, TRACE, is intended for future community governance of model review queues, dataset requests, and reproducibility bounties. No token or on-chain service is live in this demo.