Soot and Ships: A Vicious Cycle
As Arctic sea ice melts faster due to global warming, new shipping routes are opening in waters that were once frozen year-round. But this increase in traffic comes with a hidden cost: black carbon, or soot, emitted by ships. When soot settles on snow and ice, it darkens surfaces and traps the sun’s heat, accelerating melting. “It ends up in a never-ending cycle of increased warming,” says Sian Prior, lead adviser for the Clean Arctic Alliance. Melting Arctic ice doesn’t just affect the region — it can disrupt weather patterns around the world.
Cleaner Fuel Push Faces Political and Economic Hurdles
Countries including France, Germany, Denmark, and the Solomon Islands have proposed requiring ships in Arctic waters to use “polar fuels,” which are lighter and emit less pollution. The rules would apply to all vessels north of the 60th parallel and were set for discussion at the International Maritime Organization (IMO). But progress has been slow. A 2024 ban on heavy fuel oil has only modestly reduced emissions, partly due to loopholes allowing ships to continue using it until 2029. Geopolitical tensions, such as U.S. interest in Greenland and lobbying against climate measures, have also slowed action, leaving black carbon largely unregulated.
Arctic Traffic and Pollution Are Both Rising
Ship activity in the Arctic has surged: between 2013 and 2023, the number of vessels north of the 60th parallel grew 37%, while the distance they traveled more than doubled. Black carbon emissions rose from 2,696 tonnes in 2019 to 3,310 tonnes in 2024, with fishing vessels as the largest contributors. Environmental groups warn that regulating fuel is the only practical way to curb emissions, as limiting traffic entirely is unlikely — Arctic routes save days on trips between Asia and Europe. Some companies, wary of environmental and safety risks, have pledged to avoid the Northern Sea Route, but without strict fuel standards, the Arctic’s fragile environment remains under serious threat.
