place in the Arctic and Antarctic. Depending on the season, the ice covers greater or lesser parts of the ocean. In the Northern Hemisphere, the ocean gradually freezes over in the course of the long Polar [...] near the end of winter. At this point, the Arctic Ocean is completely covered in ice from between the coasts of Canada, Alaska and Siberia to the eastern coast of Greenland. When the sun returns, the ice [...] the formation and melting of sea ice affect the atmosphere and the ocean, and with them, the climate, in a variety of ways. The ice reflects the majority of incoming sunlight back into space. In contrast