Arctic Polar Bears Face Mobility Challenges as Ice Buildup Causes Paw Injuries

Arctic polar bears, facing shifting ice conditions and warmer temperatures, are increasingly suffering from painful injuries caused by ice accumulation on their paws, according to recent findings from wildlife research in northern Canada and Greenland. The study, which observed two distinct polar bear populations over a decade, found that melting and refreezing snow, accelerated by warming trends, has led to unusually severe paw injuries in some of the animals. Researchers observed polar bears with frozen ice chunks as large as 30 centimeters on their paws, causing deep lacerations and significant pain. These injuries limit the bears’ movement and could pose a threat to their ability to hunt, ultimately impacting their survival in a rapidly warming Arctic environment.

The findings stem from fieldwork conducted between 2012 and 2022, where scientists from the University of Washington and other institutions monitored polar bears’ health, cataloging symptoms like hair loss, cuts, skin ulcerations, and immobilizing ice buildup. Notably, no such injuries were recorded during prior studies of these regions, suggesting a correlation with the Arctic’s increasingly erratic weather. According to the researchers, shifts in Arctic snowfall and the frequency of “rain-on-snow” events—where rain falls onto snow and later freezes—are likely culprits. These rain-on-snow incidents lead to wet snow clinging to polar bear paws, which then refreezes as temperatures drop, forming solid blocks of ice on the bears’ footpads and surrounding fur. This frozen buildup has created a range of issues, as observed in both Canada’s and Greenland’s bear populations.

Local Indigenous communities in the affected areas reported similar ice buildup injuries in sled dogs during certain weather conditions, supporting the researchers’ theory. This shared experience adds context to the effects of new environmental factors on Arctic wildlife, as both animal groups struggle with ice-related paw injuries caused by the altered Arctic landscape. Climate scientists highlight that the Arctic is warming nearly four times faster than the global average, contributing to significant shifts in snowfall and temperature patterns, leading to harsher travel conditions for polar bears. The ongoing warming trend not only affects bear populations but also endangers the ecosystem’s balance, where polar bears play a critical role as apex predators.