Rate of global temperature increase
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Global Temperature Increase: Historical and Recent Rates
Over the past 30 years, the global surface temperature has increased at a rate of about 0.2°C per decade, closely matching early climate model predictions from the 1980s . More recent analyses confirm a similar trend, with the global mean surface temperature rising at approximately 0.18°C per decade over the last 50 years, and no evidence of a global warming hiatus since the late 1990s 345. Since 1981, the rate of warming has more than doubled compared to the long-term average since 1880, reaching about 0.18°C per decade .
Regional and Temporal Variations in Warming Rates
The rate of temperature increase is not uniform across the globe. Land areas, especially at high northern latitudes, have warmed faster than the global average, with regions like Greenland experiencing rates as high as 0.65°C per decade . In contrast, some equatorial regions and parts of the Southern Hemisphere have seen slower warming, often less than 0.15°C per decade . Since the late twentieth century, land temperatures have warmed nearly twice as fast as ocean surface temperatures .
Projections for Future Global Temperature Rise
Climate models project that, even if greenhouse gas concentrations were stabilized at current levels, the world would still be committed to at least an additional 0.6°C of warming over this century . Over the next two decades, global temperature is expected to rise by 0.3–0.7°C, though natural variability may obscure short-term trends . By the end of the century, the projected increase depends heavily on future emissions: under high-emission scenarios, global temperatures could rise by 2.6–4.8°C, while aggressive mitigation could limit the increase to 0.3–1.7°C above late 20th-century levels 178.
Exceeding Key Temperature Thresholds
Recent research suggests that global warming has already exceeded 1.5°C above pre-industrial levels, reaching about 1.7°C by 2020—higher than many previous estimates . Other studies indicate that the world is currently about 1°C warmer than pre-industrial times, with a strong likelihood of surpassing 1.5°C within the next decade if current trends continue 910. Achieving the Paris Agreement goal of limiting warming to well below 2°C will require much faster reductions in carbon intensity than have been observed so far 179.
Conclusion
The rate of global temperature increase has accelerated in recent decades, with current warming rates around 0.18–0.2°C per decade since the 1980s 2345. Regional differences are significant, and projections indicate that without rapid and sustained emission reductions, global temperatures are likely to exceed critical thresholds within the next few decades 1678+1 MORE. The evidence underscores the urgency of global efforts to mitigate greenhouse gas emissions to avoid the most severe impacts of climate change.
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