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Early warning signals vs paleoclimate proxies vs model ensembles: comparing tipping point detection approaches
Statistical early warning signals (rising autocorrelation, increased variance) can detect approaching tipping points 10–50 years in advance but produce false-positive rates of 15–30%. Paleoclimate proxies offer empirical evidence of past regime shifts across 800,000+ years of ice-core records, while coupled model ensembles simulate tipping thresholds under RCP/SSP scenarios. This guide compares reliability, lead time, data requirements, and actionability for climate risk planning.