Related Data for: The relative impacts of tropical Pacific teleconnections and local insolation on mid-Holocene precipitation over tropical South America

This dataset consists of simulation output generated using an atmospheric general circulation model, the ECHAM4.6. It includes monthly precipitation and annual precipitation δ¹⁸O fields from four ECHAM4.6 simulations. These experiments were designed to isolate the relative effects of tropical Pacific teleconnections and local mid-Holocene insolation forcing on tropical South American hydroclimate and serves as a supplement to Wong and Wang (2025). The dataset provides the raw model output for precipitation and precipitation δ¹⁸O, delivered in NetCDF format. Four experiments are included (please see the associated publication for a full methodological description of each experiment): - Control: forced with observed monthly SSTs from 1979–2019 - NoENSO: climatological SSTs imposed over the tropical Pacific - LNstate: mid-Holocene La Niña–like mean-state SST pattern applied in the tropical Pacific - MHinsol: mid-Holocene orbital insolation and greenhouse gas concentrations applied. The simulations were conducted in 2021–2022 using the isotope-enabled ECHAM model version 4.6. The model was run as an atmospheric general circulation model with prescribed sea-surface temperatures. It employs a hybrid sigma–pressure vertical coordinate system and was configured at T42 horizontal resolution (~2.8° × 2.8°) with 19 vertical atmospheric levels. The dataset contains the processed model output, where one spin-up year has been removed, and the final 40 years of each experiment are included. Monthly precipitation fields were extracted directly from the model output, while annual precipitation δ¹⁸O values were derived from the model’s isotope module.