Data for: "Changes in temperature, rainfall and snow cover during the reproductive season of Arctic-breeding birds"

This repository contains the Arctic climate data products used in the associated manuscript on Arctic hydroclimatic change. The dataset includes processed outputs from ERA5 reanalysis, CMIP6 climate model simulations, and ALEVA long steady-state EC-Earth climate model experiments. The files provide Arctic time series and regional subsets of precipitation, snowfall, snow cover, near-surface air temperature, and derived rainfall (computed as precipitation minus snowfall). Data have been spatially remapped, masked, and temporally aggregated to ensure consistency across sources and to support long-term trend, variability, and extreme-event analyses. These data products represent the exact inputs used in the study’s statistical analyses and figures. They are shared to support transparency and reproducibility of the published results and are not intended to serve as raw climate model or reanalysis archives.