Has global warming accelerated recently?

Question

Hans Steiner · Accepted Answer

Evidence points to a faster warming pace since the mid‑2010s

Multiple independent analyses of global temperature records show the planet is warming faster over the most recent decade than in previous decades. After accounting for known natural variability, researchers report an increase in the rate of surface warming to roughly 0.35°C per decade since about 2015, compared with an average rate just under 0.2°C per decade from 1970 to 2015.

The shift reflects a combination of persistent greenhouse‑gas forcing and the influence of background climate variability. A faster trend raises practical consequences:

Near-term targets: the higher warming rate makes temporary overshoots of the Paris Agreement’s 1.5°C limit more likely unless emissions are steeply reduced.
Extreme events: a steeper slope increases the frequency and severity of heatwaves, extremes in precipitation, and other climate impacts already tied to temperature.
Planning horizons: adaptation and mitigation timelines need updating to reflect a faster approach to critical thresholds.

Uncertainties remain about short-term fluctuations and how long the accelerated pace will persist. Scientists emphasize that while natural variability can modulate year‑to‑year temperatures, the underlying upward trend is driven by accumulating greenhouse gases. The practical takeaway is immediate: limiting long‑term warming still depends on rapid, sustained reductions in emissions, and policymakers must recognize the nearer deadline that an accelerated warming rate implies.