Preprocess-Data To access, concatenate, and confirm data: CMIP6 (2025.06.23) tools: 'os' in python,wget, cdo, 1. download json files 2. download data based on json files 3. merge and move data ERA5 (2025.06.23) tools: cdsapi in python, cdo 1. single-level, hourly data 2. pres-level, monthly data JRA3Q (2025.06.23) 1.download 2.find missing files 3.merge CONUS404 1. normal downloading 2D and 3D fields 2. multi-threading downloading using multiple CPUs MRMS 1. normal downloading for SE US 2. multi-threading downloading using multiple CPUs