Extreme Melting of the Greenland Ice Sheet: New Data on Climate Change

The extreme melting of the Greenland ice sheet has become significantly more intense and frequent due to climate change, as confirmed by new research led by scientists from the University of Barcelona. This study, published in SciTechDaily, indicates that such events are affecting increasingly larger areas and leading to a substantial increase in the volume of meltwater.

According to data collected during the study, since 1990, the area impacted by episodes of extreme melting has grown by approximately 2.8 million square kilometers per decade. Meanwhile, the volume of meltwater generated by this process has significantly increased—from 12.7 gigatons per decade during the period from 1950 to 2023 to 82.4 gigatons in recent decades. This indicates that climate change has serious consequences for Greenland's ecosystem and global sea levels.

The research also points out that most of the most powerful ice melting episodes have occurred in the modern period. Seven of the ten largest events recorded in the history of observations took place after 2000, notably in August 2012, July 2019, and July 2021. These events were characterized by unprecedented intensity, raising concerns among scientists and ecologists.

Scientists also found that the amount of meltwater during such extreme events is increasing. After 1990, under similar weather conditions, the amount of meltwater increased by 25% compared to the period from 1950 to 1975. When considering all extreme cases as a whole, the increase in meltwater volumes reaches 63%. This indicates that climate change is not only affecting the frequency of such events but also their intensity.

Particularly vulnerable has been northern Greenland, where changes have become most noticeable. Scientists predict that under high greenhouse gas emissions, by the end of the century, extreme deviations in meltwater volumes in this region could triple. This could have catastrophic consequences for local ecosystems as well as for the global climate.

The study was led by scientist Josep Bonsoms from the Faculty of Geography at the University of Barcelona in collaboration with Professor Marc Olivó. The researchers analyzed extreme melting events from 1950 to 2023, using a new approach that combines atmospheric circulation models with a regional climate model. This approach allowed them to separate the impact of atmospheric warming from changes in air currents, which is crucial for understanding the causes of extreme ice melting.

According to Bonsoms, rapid glacier changes have global consequences, including rising sea levels, potential changes in ocean circulation, and impacts on strategic and economic processes in the Arctic. Scientists emphasize that understanding the causes of the intensification of such events is critically important for predicting risks and making decisions based on scientific data. This knowledge can help countries adapt to climate change and mitigate its negative impacts.