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Scientific study reveals advance of deep warm water and explains increasing risks to glaciers that protect the continent
Scientists have identified a significant change in ocean behavior, reinforcing the warning about Antarctica’s future. Deep warm ocean water is advancing towards the icy continent, as shown in a study published on Monday, in 2026, in the scientific journal Communications Earth & Environment.
The research was led by the University of Cambridge, in partnership with the University of California, based on data collected over decades. Thus, this thermal advance represents a direct risk to the ice shelves, which support the stability of the region’s glaciers.
Investigation confirms silent advance over two decades
Researchers identified that a mass of warm water has gradually expanded and advanced towards Antarctica over the past 20 years. For this, they used long-term oceanographic measurements obtained by ships and floating robotic devices.
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These devices recorded consistent changes in temperature and ocean circulation, which reinforces the reliability of the data. Until then, although climate models predicted this behavior, there were not enough observations for direct confirmation.
Now, the evidence validates these projections.
Ocean absorbs heat and accelerates changes in the climate system
Scientists explain that the phenomenon occurs due to global warming, which alters the thermal balance of the oceans. More than 90% of the excess heat generated by human activities is absorbed by the oceans, while the Southern Ocean holds a large part of this storage.
In this scenario, the redistribution of heat favors the advance of warm water towards Antarctica. Thus, the observed process is part of a broader transformation of the global climate system.
Melting from below compromises platform stability
According to Joshua Lanham, from the Department of Earth Sciences at the University of Cambridge, warm water flows under the ice shelves and causes melting from the base. This process compromises the stability of these structures over time.
As a consequence, the ice shelves become more fragile and susceptible to collapses. These formations act as natural barriers that prevent the accelerated advance of continental glaciers, which increases the importance of this balance.
Risk of sea level rise comes into focus
Researchers highlight that the main risk is linked to the increase in sea level. Ice shelves help contain large volumes of ice from the interior of Antarctica.
These masses store enough fresh water to raise sea levels by about 58 meters. When these barriers weaken, glaciers advance more rapidly towards the ocean, which can accelerate this process on a global scale.
Change in ocean circulation alters natural protection
In the past, a layer of cold water protected the ice shelves and hindered melting. This thermal barrier functioned as a natural protection mechanism.
However, according to Sarah Purkey, from the Scripps Institution of Oceanography, this dynamic has changed. Ocean circulation now allows warmer waters to reach previously protected regions.
The scientist compares this scenario to a “hot water tap” opened in the ocean, raising the surrounding temperature.
Impacts extend beyond Antarctica and affect the global climate
Beyond ice melt, the phenomenon generates broader consequences. According to Professor Ali Mashayek from the University of Cambridge, the Southern Ocean regulates global heat and carbon storage.
Therefore, changes in this region directly influence the global climate system. These alterations can impact weather patterns in various parts of the planet.
Thus, the advance of warm water in Antarctica ceases to be a local problem and becomes a global challenge.
Given this scenario, how will the continuous advance of warm water influence climate balance and sea levels in the coming decades?
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