A study titled Planeta em Degelo, based on new data from the Brazilian Antarctic Program (Proantar), warns of the acceleration of glacier melting, which totaled 9,179 gigatons since 1976, threatening coastal cities mainly. Almost all of this amount (98%) reached the oceans in liquid form since 1990, and 41% only between 2015 and 2024.
In an interview with Agência Brasil on Monday (March 2), biologist Ronaldo Christofoletti, professor at the Federal University of São Paulo (Unifesp), stated that extreme rains, intense heat, more frequent and extensive fires, and accelerated ice melt are all symptoms of global warming – and this connection needs to be understood by society.
“They are all basically the same, just with different appearances. And they all reinforce the idea that the planet’s dynamics are really changing,” said the scientist, who is part of the program’s communication project – ComAntar – and spoke to the reporter by phone from Antarctica.
Each gigaton corresponds to a trillion kilograms, meaning the total melted amount is equivalent to 18,000 times the mass of the current world population.
Published on February 26, the study also states that since 1976, the accumulated glacier loss equals about 9,000 km³ of water – a volume similar to what the Amazon River discharges into the Atlantic Ocean in 470 days.
Most of the melted volume came from Antarctica and Greenland, regions where the loss reached 8,000 gigatons since 2002.
This means that in just over two decades, the loss observed in the polar ice caps reached the equivalent of what glaciers around the world lost in nearly 50 years, signaling an even faster pace.
“The glaciers are turning into water. And this water will cause sea level rise. As a result, the sea will rise and claim a portion of the continents for this water to occupy. It’s a process,” highlighted the specialist.
The study is based on consolidated records from the World Glacier Monitoring Service (WGMS) and the Proantar Carbmet Project.
Global warming
Christofoletti points out that the accelerated melting is linked to record temperatures recorded in recent years, with 2023, 2024, and 2025 among the hottest in history.
“We need to recognize that this is happening and adapt our cities so they can manage their coastlines and coastal erosion, acknowledging that there will be loss of land area.”
Another problem caused by ice melting is the change in ocean salinity, since glacial water is fresh and further dilutes the salt concentration in seawater. This phenomenon weakens the ocean currents that transport cold water from Antarctica to the tropics and impacts the climate of the entire planet, said the researcher.
In Brazil’s case, the data indicate that, despite the geographical distance, the polar regions play a fundamental role in climate regulation. Changes in Antarctic ocean circulation influence the formation of deep water masses that distribute heat around the planet.
“These changes can have repercussions in the South Atlantic, affecting rainfall patterns, cold fronts, and extreme events in Brazil.”
Environmental education
To deal with this situation, Ronaldo Christofoletti argues that education is fundamental. He cites the Brazilian government’s Blue Curriculum initiative, which incorporates ocean education into school curricula. “We call it ocean culture, but it’s not about the ocean itself; it’s about understanding the planet we live on, of which 70% is ocean,” he said.
Education leads to behavior change, argued Christofoletti. “People need to know what’s happening, understand this process, and its relation to their lives.”
The researcher also emphasized the importance of fulfilling the agreements signed during the 2025 United Nations Climate Change Conference (COP30) in Belém to advance the energy transition and replace fuels that cause greenhouse gas emissions. This change is essential to minimize the global warming problem.
Until that happens, however, he believes more immediate measures are necessary, such as adapting coastal cities.
During COP30, ComAntar released a document showing that the increase in disasters is closely related to cold fronts and cyclones. In the study, ComAntar researchers show that the frequency of disasters caused by cold fronts and cyclones on the coast increased 19 times in the last 30 years.
Brazilian Antarctic Program
Proantar is led by the Brazilian Navy, the Ministry of Science, Technology, and Innovations, and the Ministry of Foreign Affairs. The program is one of Brazil’s oldest, with 44 years of uninterrupted operation.
Source: Agência Brasil