Study warns: Arctic could completely lose summer sea ice by 2030

According to the study, the occurrence of ice-free summers is inevitable, even with significant reductions in emissions, which will likely lead to more intense heat waves and floods.

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Arctic sea ice off the coast of Svalbard, Norway on April 5, 2023

Scientists warned that the Arctic may run out of sea ice about a decade ahead of original projections, which is further clear evidence that the climate crisis is unfolding at an accelerated pace, exceeding expectations. As the world continues to release pollutants that cause global warming. It's already too late to save Arctic sea ice during summers, the research says. Scientists stress the need to prepare for the increase in extreme weather in the northern hemisphere that is likely to occur as a result of this situation.

Study

The study, published on Tuesday (06) in the Evista Nature Communications, revealed that Arctic sea ice could disappear completely during the month of September as early as the 2030s. Even if significant reductions are implemented in the pollution that currently contributes to global warming, scientists say that the Arctic could still experience ice-free summers sea ​​ice in the 2050s. The researchers analyzed changes that occurred between 1979 and 2019, comparing different satellite datasets and climate models to assess changes in Arctic sea ice.

It was found that the decrease in sea ice is largely attributed to pollution caused by human activity, which is contributing to global warming. This conclusion is supported by previous studies and models.

"We were surprised to find that an ice-free Arctic will be there in the summer regardless of our efforts to reduce emissions, which was not expected," said Seung-Ki Min, lead author of the study and professor at the University of Science and Technology in Pohang in South Korea.

During the winter, there is accumulation of ice in the Arctic, which melts during the summer, usually reaching its lowest point in September, before starting a new cycle. Min said that if Arctic summers become ice-free, the process of accumulating sea ice in the colder seasons will be significantly slower. As temperatures rise, so does the likelihood that the Arctic will run out of sea ice during the coldest season.

According to Min, in a scenario of "higher emissions path", where the world persists in burning fossil fuels and pollution levels causing global warming continue to rise, the study predicts that the Arctic will experience total loss of sea ice between August and October before 2080.

The discoveries

Min stated that the findings of this new study contradict the 2021 report of the United Nations Intergovernmental Panel on Climate Change, which predicted that the Arctic would be "virtually ice-free near mid-century under intermediate and high greenhouse gas emissions scenarios". According to this new research, this situation could occur 10 years earlier, regardless of different emissions scenarios.

Heating

According to a 2022 study, it was found that the Arctic has heated four times faster than the rest of the world over the last few decades. The region has been experiencing accelerated loss of sea ice, with a rate of decrease of 12.6% per decade in September, as reported by NASA. A scenario in which the Arctic has no sea ice during the summer would have catastrophic effects on a global scale. Bright white sea ice reflects solar energy away from Earth.

However, when that ice melts, the dark ocean is exposed, absorbing more heat and resulting in additional warming. This feedback process is known as "arctic amplification". Declining sea ice could also affect the global climate that extends far beyond the Arctic.

“We need to prepare for a warmer Arctic world very soon,” Min said. “As Arctic warming is suggested to bring climate extremes such as heatwaves, wildfires and flooding in the northern mid- and high-latitudes, the early onset of an ice-free Arctic also implies that we will be experiencing extreme events more rapidly than expected. anticipated," he added.

An Arctic without sea ice could result in an increase in commercial maritime transport due to the opening of new routes, which would have indirect implications. As indicated in last year's Arctic annual report from the National Oceanic and Atmospheric Administration, the increase in maritime traffic would lead to an increase in emissions and pollution in the region.

Min said evidence indicates that the Arctic is on the verge of facing severe deterioration and that the region has reached a tipping point. We can similarly compare Arctic sea ice to our body's immune system, which is responsible for protecting us from harmful elements," explained Min. "Without this protection, the condition of the Arctic will rapidly deteriorate, leading to significant worsening."