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Sea ice covers about 7% of the Earth's surface and about 12% of the world's oceans. Much of the world's sea ice is enclosed within the polar ice packs in the Earth's polar regions: the Arctic ice pack of the Arctic Ocean and the Antarctic ice pack of the Southern Ocean.
Access the maps and data. The maps and graphs presented in the monthly summaries of sea-ice are based on pre-release data from ECMWF's ERA-Interim reanalysis of observations from 1979 to the present. They are subject to change should a significant production problem be found to have occurred.
Sea ice is frozen seawater that floats on the ocean surface. It forms in both the Arctic and the Antarctic in each hemisphere’s winter; it retreats in the summer, but does not completely disappear. This floating ice has a profound influence on the polar environment, influencing ocean circulation, weather, and regional climate.
26 de jul. de 2022 · An ocean with an estimated depth of 40 to 100 miles (60 to 150 kilometers) is believed to lie below that 10- to 15-mile-thick (15 to 25 km) shell of ice. The rafts, strange pits, and domes suggest that Europa’s surface ice could be slowly turning over due to heat from below.
18 de oct. de 2021 · Sea ice plays an important role in reflecting sunlight back into space, regulating ocean and air temperature, circulating ocean water, and maintaining animal habitats. A still image visualizing Arctic sea ice on Sept. 16, 2021, when the ice appeared to reach its yearly minimum extent.
Overview. What is sea ice? Sea ice is frozen seawater that floats on the ocean surface. Bookending our planet, sea ice waxes and wanes with the polar seasons. In the Arctic winter, sea ice stretches its tentacles into seas and coastlines far from the poles.
The cryosphere encompasses the frozen parts of Earth, including glaciers and ice sheets, sea ice, and any other frozen body of water. The cryosphere plays a critical role in regulating climate and sea levels.
