CESM Climate Model Outputs for Late Paleozoic Orbital Experiments

This dataset contains source climate model outputs from 21 idealized fully coupled Community Earth System Model version 1.2.2 (CESM1.2.2) simulations under late Paleozoic boundary conditions. The experiments were designed to evaluate how eccentricity, obliquity, and longitude of perihelion affect seasonal insolation, tropical hydroclimate, atmospheric circulation, meridional moisture transport, atmospheric heat transport, and cryosphere-sensitive surface conditions during the late Paleozoic Ice Age. These source model outputs support the analyses presented in the associated manuscript, “Orbital modulation of meridional atmospheric heat transport and ITCZ variability during the late Paleozoic Ice Age.” Annual and fixed-angular seasonal diagnostics, including global mean surface temperature, precipitation, ITCZ metrics, Hadley circulation, meridional water-vapor transport, storage-corrected atmospheric heat transport, snow water equivalent, and sea-ice-edge diagnostics, can be reproduced from these files using the methods described in that manuscript. The archive contains two folders: daily_core/This folder contains 21 NetCDF files derived from daily CAM h1 output. Each file represents a 365-day climatology averaged over the final 100 diagnostic years of one orbital experiment. These files include near-surface atmospheric variables used for daily and fixed-angular seasonal diagnostics, including near-surface air temperature, daily minimum and maximum near-surface air temperature, convective and large-scale precipitation, and sea-level pressure. monclim_core/This folder contains 21 NetCDF files derived from monthly CAM h0 output. Each file represents a 12-month climatology averaged over the final 100 diagnostic years of one orbital experiment. File names encode the orbital configuration of each experiment. E, O, and the final number denote eccentricity state, obliquity state, and longitude of perihelion, respectively. For example, Emax_Omax_90 represents the high-eccentricity, high-obliquity experiment with longitude of perihelion set to 90°.