Scientists Warn of Ocean Burp as Massive Heat Reservoir Found Beneath Southern Ocean

• Scientists have discovered a vast heat reservoir beneath the Southern Ocean , warning that it could release a powerful “ ocean burp ” capable of reigniting global warming even after emissions decline. The trapped heat, accumulated over centuries of industrial activity, poses a long-term threat to climate stability.

Southern Ocean: Earth’s Climate Buffer

• The Southern Ocean around Antarctica has absorbed more than 90% of the planet’s excess heat and nearly a quarter of its carbon dioxide since the industrial era. This process has helped stabilise global temperatures, slow sea-ice loss, and reduce the intensity of extreme weather. However, scientists now warn that the ocean’s deep layers may begin releasing this stored heat back into the atmosphere.

The ‘Burp Phase’ Explained

• Research from the University of Victoria and German climate scientists, using the UVic v2.9 climate model , suggests that once global emissions start to fall, the deep ocean could enter a “ burp phase ” — a sudden release of stored warmth after centuries of absorption. This could trigger a new wave of warming similar in magnitude to that caused by industrial-era greenhouse gases, even if atmospheric CO₂ levels remain stable.

How the Heat Release Happens

• Changes in ocean circulation and melting Antarctic ice are driving heat deeper into the ocean. When surface temperatures eventually cool, this trapped energy could resurface, raising atmospheric temperatures again and disrupting global climate patterns.

Exam-Oriented Facts

• Southern Ocean absorbs over 90% of excess planetary heat.

• “Burp Phase” refers to the future heat release from ocean depths.

• Study conducted using the UVic v2.9 climate model .

• Could trigger another century-long warming phase .

Global Impacts
A large-scale heat release could accelerate Antarctic ice melt , intensify storms and droughts , and harm marine ecosystems by altering oxygen and nutrient cycles. Scientists caution that achieving Net Zero emissions will not immediately stabilise the climate, as the ocean’s delayed reaction could drive prolonged warming for generations .