Lead
A new international analysis published in March 2026 concludes that human activity is warming the planet at the fastest rate on record. By filtering out natural influences such as volcanic activity, solar cycles and El Niño, the researchers find the global warming rate roughly doubled in the last decade compared with the 1970–2015 period. The study reports a rise from under 0.2°C per decade (1970–2015) to about 0.35°C per decade over the past ten years, and warns that, if sustained, this pace would push long-term warming past the Paris 1.5°C threshold before 2030. Scientists stress both the seriousness of the acceleration and remaining questions about how much is permanent versus temporary variability.
Key takeaways
- The study finds global warming accelerated from less than 0.2°C per decade (1970–2015) to ~0.35°C per decade in the last decade, based on five major temperature datasets.
- Researchers removed estimated natural variability (solar, volcanic, El Niño) with a noise‑reduction method and still observed acceleration beginning in 2013–2014 in all datasets.
- The world has warmed roughly 1.4°C above preindustrial levels; continued current rates could breach 1.5°C within years, with one dataset (Copernicus) indicating a breach as soon as 2026.
- Other datasets analyzed project crossing 1.5°C on a long-term basis in 2028–2029 if the recent decade’s rate continues.
- A decrease in cooling sulphur aerosols has reduced a countervailing cooling influence, effectively amplifying greenhouse-driven warming.
- Independent researchers (Berkeley Earth, UC Santa Cruz) concur there is detectable recent acceleration but differ on how much is forced versus internal variability.
- Climate models include the observed acceleration within their ranges, but outcomes depend critically on future CO2 emissions and short-term natural fluctuations.
Background
Global surface temperature records have been systematically compiled since about 1880, allowing scientists to quantify long-term trends and short-term variability. For much of the 20th century and into the early 21st century, warming proceeded at a relatively steady pace that scientists estimated at below 0.2°C per decade from 1970 through 2015. That baseline period included both anthropogenic forcing from greenhouse-gas emissions and masking effects from atmospheric aerosols, particularly sulphur compounds from industrial activity.
Superimposed on this underlying trend are natural fluctuations—solar output cycles, episodic volcanic aerosol injections and variability in ocean–atmosphere patterns like El Niño and La Niña—that can temporarily raise or lower global mean temperatures. Distinguishing persistent, anthropogenic acceleration from such fluctuations is central to understanding near-term climate trajectories and the timing of milestone thresholds such as 1.5°C above preindustrial levels.
Main event
The new study applied a statistical noise‑reduction technique to five widely used global temperature products to estimate and subtract the contribution of identified natural drivers. After that correction, all five series show a clear rise in the warming rate that emerged around 2013–2014 and continued through the most recent decade. The method does not remove anthropogenic signals; rather, it aims to isolate and reduce the contribution of well‑known nonhuman oscillations and forcings.
Lead authors and affiliated institutions, including researchers at the Potsdam Institute for Climate Impact Research, emphasized the policy-relevant implication: if the recent decade’s elevated rate persists, long-term warming would exceed the 1.5°C Paris target before 2030. Stefan Rahmstorf of the Potsdam Institute summarized this conditional risk in public comments accompanying the paper.
Independent specialists welcomed the analysis while urging caution. Zeke Hausfather of Berkeley Earth noted the acceleration is now widely detected across datasets but pointed out uncertainty over how much of the additional warming in the past decade is a forced response to greenhouse gases versus internal variability. Claudie Beaulieu of UC Santa Cruz highlighted historical precedent—such as the 1998 El Niño spike followed by a relative slowdown—which suggests the recent rise could partly reflect transient variability.
Analysis & implications
An increase from ~0.2°C to ~0.35°C per decade materially shortens the time available to limit warming to 1.5°C or 2°C above preindustrial levels. Under the simple arithmetic of linear continuation, an accelerated rate brings forward the crossing of temperature thresholds by several years compared with earlier estimates. That earlier timetable compresses policy windows for emissions reductions and heightens the urgency of rapid CO2 cuts to avoid long-term overshoot.
Beyond headline thresholds, a faster rate of warming also raises near-term risks: more intense heatwaves, increased extreme precipitation rates, enhanced drought risk in some regions and stress on ecosystems and carbon sinks. Scientists warn that some long‑term tipping elements—ice‑sheet loss, permafrost carbon release, Amazon dieback—become more probable with higher cumulative warming and with faster crossing of critical temperature ranges.
Models used in the study and broader climate assessments can reproduce the observed acceleration within their ensemble ranges, indicating the finding is not necessarily inconsistent with current theory. Still, model agreement does not eliminate the policy imperative: how quickly the Earth continues to warm ultimately depends on the trajectory of CO2 emissions and short‑lived pollutants such as sulphur aerosols.
Comparison & data
| Period | Reported warming rate (°C/decade) |
|---|---|
| 1970–2015 | <0.2°C |
| Last 10 years (study) | ≈0.35°C |
| Recent independent estimate (Hausfather et al.) | 0.27°C |
| Warming since preindustrial | ≈1.4°C |
The table summarizes the central numeric findings and compares them with a recent alternative analysis. Differences between studies reflect variations in data sources, statistical treatment and the handling of short‑term variability. The Copernicus dataset used in the study indicates the earliest long‑term crossing of 1.5°C (calendar-year‑weighted); other datasets project breach dates in 2028–2029 if the recent warming pace continues. These projections assume persistence of the recent decadal rate and do not incorporate potential rapid mitigation actions.
Reactions & quotes
The study prompted statements from its authors and external experts, who emphasize both alarm and caution.
“If the warming rate of the past 10 years continues, it would lead to a long‑term exceedance of the 1.5°C limit of the Paris agreement before 2030.”
Stefan Rahmstorf, Potsdam Institute (co‑author)
This comment underlined the conditional nature of the projection: the outcome depends on whether the recent accelerated pace persists.
“There is now pretty widespread agreement that there has been a detectable acceleration in warming in recent years, but it remains unclear how much is forced versus unforced variability.”
Zeke Hausfather, Berkeley Earth (independent scientist)
Hausfather reiterated that the existence of acceleration across datasets is broadly accepted, while quantifying its drivers remains an active research question.
“The acceleration may prove temporary; continued monitoring will be essential to determine whether this is a lasting shift or a transient feature.”
Claudie Beaulieu, UC Santa Cruz (independent scientist)
Beaulieu cited the 1998 El Niño as an example of a strong short‑term signal that affected apparent trends in the past, arguing for cautious interpretation over several years of observations.
Unconfirmed
- Exact share of the recent additional warming attributable to anthropogenic forcing versus internal variability remains uncertain and is actively debated.
- Whether the detected acceleration represents a durable shift in the climate system or a transient response to recent natural variability (e.g., a strong El Niño) is not yet settled.
- Projected breach years for 1.5°C vary by dataset and metric; the earliest calendar‑year projection (Copernicus) implies 2026, while other datasets indicate 2028–2029.
Bottom line
The new analysis strengthens evidence that recent years have seen an unusually fast rate of planetary warming even after accounting for major natural influences. If that higher rate continues, international targets to limit warming to 1.5°C will likely be exceeded well before 2030, shortening the window for effective mitigation.
However, key uncertainties remain about permanence: some of the recent acceleration could stem from natural variability and short‑lived aerosol changes. Policymakers should treat the finding as a prompt for accelerated emissions reductions and enhanced monitoring rather than as deterministic proof of an irreversible step change in climate dynamics.
Sources
- The Guardian — media report summarizing the peer‑reviewed study and reactions
- Potsdam Institute for Climate Impact Research — academic / research institute (lead authors’ affiliation)
- Copernicus Climate Change Service (C3S) — European Union operational climate service (dataset and analysis)
- Berkeley Earth — independent research organization (external analysis and commentary)
- World Meteorological Organization (WMO) — intergovernmental organisation (confirmation of recent hottest years)