| Term: | Sea ice |
| Definition: | Any form of ice found at sea which has originated from the freezing of sea water (sea ice does NOT include superstructure icing). Ice formed from the freezing of the waters of the Great Lakes will be considered the same as sea ice. |
| Term: | Sea ice |
| Definition: | Ice formed at the sea surface by the freezing of sea water. Except where it forms ridges, sea ice is up to a few metres thick, in which respect it differs from shelf ice. See also marine ice. |
| Term: | Sea ice |
| Definition: | Ice found at the sea surface that has originated from the freezing of seawater. Sea ice may be discontinuous pieces (ice floes) moved on the ocean surface by wind and currents (pack ice), or a motionless sheet attached to the coast (land-fast ice). Sea ice concentration is the fraction of the ocean covered by ice. Sea ice less than one year old is called firstyear ice. Perennial ice is sea ice that survives at least one summer. It may be subdivided into second-year ice and multi-year ice, where multiyear ice has survived at least two summers. |
| Term: | Sea ice |
| Definition: | 1. Specifically, ice formed by the freezing of seawater; as opposed, principally, to land ice. In brief, it forms first as lolly ice (frazil crystals), thickens into sludge, and coagulates into sheet ice, pancake ice, or into floes of various shapes and sizes. Thereafter, sea ice may develop into pack ice and/or become a form of pressure ice. 2. Generally, any ice floating in the sea. |
| Term: | Sea ice |
| Definition: | Any form of ice found at sea which has originated from the freezing of sea water. |
| Term: | Sea ice |
| Definition: | Ice that forms by the freezing of sea water. (Cf. ice shelves and icebergs which also float on the sea and are derived from glacier ice on land). |