1. EPICA Ice Cores (800,000 year historical climate data)

Primary Data Archives:

NOAA NCEI - Main repository for EPICA data:
- https://www.ncei.noaa.gov/access/metadata/landing-page/bin/iso?id=noaa-icecore-12882
- https://www.ncei.noaa.gov/products/paleoclimatology/ice-core/
CDIAC/ESS-DIVE - 800,000-year ice-core CO2 records:
- https://cdiac.ess-dive.lbl.gov/trends/co2/ice_core_co2.html
PANGAEA - Temperature proxy data:
- https://doi.pangaea.de/10.1594/PANGAEA.683655

2. Berkeley Earth (Modern warming data)

Primary Data Portal:

Berkeley Earth Official Data Portal:
- https://berkeleyearth.org/data/
NOAA Physical Sciences Laboratory:
- https://psl.noaa.gov/data/timeseries/month/DS/BERKELEYGLBCOMT/
- https://psl.noaa.gov/data/timeseries/month/DS/BERKELEYGLBLT/
Community Resources:
- https://github.com/compgeolab/temperature-data

Data Sources:

1. EPICA ice cores - Used for the 800,000 year historical climate data
2. Berkeley Earth - Used for the modern warming data (the "sharp red spike")