Recent wildlife research in northern Canada and Greenland indicates that Arctic polar bears are enduring painful injuries due to shifting ice conditions and warmer temperatures. Over a decade-long study observing two distinct polar bear populations, researchers found that melting and refreezing snow, exacerbated by rising temperatures, has resulted in severe paw injuries for some bears. Observations included ice chunks as large as 30 centimeters accumulating on their paws, causing deep lacerations and significant pain, which can restrict their movement and hunting ability, jeopardizing their survival in a warming Arctic.
The fieldwork conducted from 2012 to 2022 by scientists from the University of Washington and other institutions cataloged various health symptoms in polar bears, such as hair loss, cuts, and immobilizing ice buildup. Unlike previous studies, no similar injuries were documented before, indicating a connection with the increasingly unpredictable Arctic weather. Researchers attribute these injuries to atypical snowfall patterns and rising occurrences of rain-on-snow events, where rain falls on snow and freezes. This phenomenon creates wet snow that clings to the bears’ paws, forming solid blocks of ice.
Local Indigenous communities have also reported similar injuries in sled dogs under equivalent weather conditions, emphasizing the broader effects of climate changes on Arctic wildlife. Climate scientists note that the Arctic is warming nearly four times faster than the global average, significantly altering snow and temperature patterns and threatening the balance of ecosystems where polar bears serve as apex predators.