The Arctic consists of three distinct atmospheric zones that respond differently to global warming, according to a study conducted by scientists at the University of Helsinki. The research relies on aerosol observation data collected across eight Arctic monitoring stations between 2003 and 2024.
Sea-news.az reports that citing results published in the journal Nature Geoscience.
By integrating ground-based measurement records with satellite data through computational analysis, researchers identified three primary regimes: the High Arctic, Maritime Arctic, and Continental regions.
In the High Arctic, which encompasses Greenland and the Canadian Arctic Archipelago, ongoing warming and sea ice retreat are projected to accelerate the formation of aerosol particles necessary for cloud development. According to author calculations, the concentration of these cloud-forming particles could increase by 3 to 16 percent in this zone by the end of the 21st century.
“In the Maritime Arctic, which includes the Barents and Norwegian Seas, the concentration of particles facilitating cloud droplet formation is conversely predicted to decline by 15 to 31 percent. While conditions remain favorable for the birth of new aerosols, these particles often fail to grow to the required size,” the scientists determined.
In the Continental Arctic, atmospheric conditions depend primarily on long-range transport driven by air currents. The composition of the atmosphere in this zone is heavily influenced by industrial emissions, wildfires, and agricultural activities originating across Europe, Siberia, and North America.
Aerosol particles play a foundational role in cloud droplet nucleation. Fluctuations in their abundance alter cloud microphysics, affecting the amount of solar radiation reaching Earth’s surface and the volume of heat retained in the atmosphere.
The study’s authors emphasize that future climate projections must account for these regional divergences to improve predictive accuracy for the Arctic, which continues to warm roughly four times faster than the global average.
