Why is global warming speeding up?

Recent decade shows a faster warming pace

Multiple independent analyses of temperature records show that the planet’s surface is warming noticeably faster in the past decade than in the late 20th century. After researchers removed known natural cycles such as El Niño, the warming rate since roughly 2014–2015 rises to about 0.35°C per decade, compared with roughly 0.2°C per decade over the period from 1970 to 2015.

What drives the acceleration

The primary driver is continued accumulation of greenhouse gases in the atmosphere, which raises Earth’s energy imbalance and amplifies surface warming. Superimposed on that long-term trend are shorter-term natural variations — for example, ocean heat uptake and climate oscillations — that can temporarily speed or slow warming. When recent analyses account for those fluctuations, the underlying trend points to a sharper rise than previously observed.

Why it matters now

A faster warming rate shortens the time available to avoid large-scale and potentially irreversible impacts. The implications include:

• higher likelihood of crossing temperature thresholds tied to ecosystem collapse and ice‑sheet loss
• more frequent and intense heat waves, storms and droughts
• increased strain on food, water and energy systems

What can be done

Policymakers and planners face a narrowing window for decisive action. Strategies include:

• reducing emissions faster and at larger scale
• accelerating deployment of adaptation measures to protect vulnerable communities
• improving climate monitoring and regional modelling to anticipate impacts

Uncertainties remain about the timing and local magnitude of some consequences. Still, the trend strengthens the scientific case for faster mitigation and for investing in resilience across societies and ecosystems.