The immense release of fresh water from the Arctic's waterways into the Arctic Ocean triggers the annual sea ice melt in spring — and fuels the mass migration of fish, birds and whales. These great rivers transport more than 1,200 cubic miles of nutrient-rich freshwater. This represents 10 percent of the world's freshwater runoff, fertilizing the Arctic Ocean and reducing its overall salinity. As the floodwaters from the melt rush through towns, they carry thousands of tons of ice, causing mi... Dyke, Dike, Rivers Flow, Beautiful Planets, Sea Ice, Arctic Rivers, Ice Melted, Arctic Ocean, Frozen Arctic
A brinicle grows from the ice sheet above in McMurdo Sound, Antarctica. Over the course of 12 hours, it descends to the seafloor below, then extends another 20 feet along the sea bed, trapping anything it touches in ice. Most creatures here move far too slowly to escape its path of death. When salt-rich water leaks out of sea ice, it sinks into the sea and can occasionally create an eerie finger of ice called a brinicle. Credit: BBC (2011) Chadden Hunter | via Discovery News
Adélie penguins on ice floes off the coast of Cape Crozier, Antarctica.