Global Temperature Anomalies in Practice

An Open, Reproducible Framework for Baseline Harmonisation and ENSO-Aware Visualisation

Abstract

We present a reproducible pipeline for downloading, processing, and harmonising global temperature anomaly series from HadCRUT5, GISTEMP, NOAAGlobalTemp, Berkeley Earth, and ERA5. All datasets are aligned to a common 1850-1900 pre-industrial baseline to enable direct compar-ison. The workflow also integrates the Oceanic Niño Index (ONI) to annotate El Niño and La Niña phases in the figures, helping distinguish short-term variability from the long-term warming signal. Final outputs are exported as transparent, analysis-ready CSV files, available through the repository.

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Read the working paper freely in the manuscript repository here. The repository contains links to the code and data used in the paper.

The paper is also available as a preprint on EarthArXiv here.

Recommended citation

Text

Vera-Valdés, J.E. (2026). “Global Temperature Anomalies in Practice”. EarthArXiv (13310) DOI: 10.31223/X56N3Z.

BibTex

@article{vera-valdesGlobalTemperatureAnomalies,
    title = {Global Temperature Anomalies in Practice},
    author = {Vera-Valdés, J Eduardo},
  year = {2026},
  journal = {EarthArXiv},
  doi = {10.31223/X56N3Z},
}