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Spatial emergence of acceleration in global warming

Tanja Korsten Bugajski, Nicolai Peder Bulow Pedersen, J. Eduardo Vera-Valdés

Featured July 9, 2026

Original Paper

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Simply

A new map-making method shows that global warming is speeding up in different places at different times, starting earliest in cold, northern areas, not everywhere at once.

In depth
The paper introduces a Bayesian hierarchical spatio-temporal model to precisely map where and when global warming is speeding up. By analyzing local temperature trends with a quadratic temporal component and accounting for spatial connections, the authors reveal that acceleration emerges unevenly, often earliest in high-latitude regions, rather than uniformly across the globe.

Key Takeaways

  • 1
    The study develops a Bayesian hierarchical spatio-temporal model to estimate local warming acceleration, explicitly accounting for spatial dependence and uncertainty.
  • 2
    It demonstrates that detectable warming acceleration emerges unevenly across the climate system, with the earliest high-confidence signals concentrated in selected high-latitude regions.
  • 3
    The framework provides a probabilistic diagnostic for identifying where warming is intensifying and when acceleration becomes statistically detectable, challenging conclusions based solely on global aggregates.

Conceptual Flow

HIGH LEVEL
1
Methodology: How was it done?

The paper uses a smart statistical model to find out if warming is speeding up in different places, not just overall.

Temperature Readings
Find Local Trends
Map of Warming Speed-Up
2
Results: What did they find?

They found that warming started speeding up first in cold, northern areas, and only later became clear globally.

Warming Speed-Up Map
See Where it Started
High-Latitude Hotspots