Climate warming is causing unidirectional changes to annual patterns of sea ice distribution,
structure, and freeze‐up. We summarize evidence that documents how loss of sea ice, the …

Evolutionary selection has refined the life histories of seven species (three cetacean
[narwhal, beluga, and bowhead whales], three pinniped [walrus, ringed, and bearded seals] …

We used quantitative fatty acid signature analysis (QFASA) to examine the diets of 1738
individual polar bears (Ursus maritimus) sampled across the Canadian Arctic over a 30‐year …

Some of the most pronounced ecological responses to climatic warming are expected to
occur in polar marine regions, where temperature increases have been the greatest and sea …

Recent studies have shown that ice duration in lakes and rivers over the Northern
Hemisphere has decreased over the 19th and 20th centuries in response to global warming …

Polar bears depend on sea ice for survival. Climate warming in the Arctic has caused
significant declines in total cover and thickness of sea ice in the polar basin and …

Hudson Bay experiences a complete cryogenic cycle each year. Sea ice begins to form in
late October, and the Bay is usually ice-free in early August. This seasonally varying ice …

Climate change is already occurring in the Arctic and the Arctic Climate Impact Assessment
recently concluded that future climate change could be devastating for Inuit. This paper …

Killer whales (Orcinus orca) are major predators that may reshape marine ecosystems via
top‐down forcing. Climate change models predict major reductions in sea ice with the …

Understanding how seasonal environmental conditions affect the timing and distribution of
synchronized animal movement patterns is a central issue in animal ecology. Migration, a …