This study investigates paleoclimatic variations over Iran, specifically focusing on the mid-Holocene and subsequent periods, through the lens of the Paleoclimate Modeling Intercomparison Project (PMIP). While General Circulation Model (GCM), such as those in PMIP4-CMIP6, provide critical baselines for understanding equilibrium states and cryosphere stability under varying thermal regimes, regional reconstructions reveal significant divergences. We demonstrate that climate oscillations in Iran such as the Younger Dryas termination exhibit substantial temporal lags (200–1500 years) compared to European and North American chronologies. These findings suggest that global warming trends do not yield uniform consequences across all latitudes. Instead, arid regions like the Middle East manifest non-linear feedback mechanisms. Consequently, Iran paleoclimate records serve as essential calibration for GCMs.

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