Sea Ice

Sea ice is frozen seawater. Because ice is less dense than its melt, sea ice floats. Sea ice covers about 7% of the Earth’s surface, or about 12% of the world’s oceans. In the North, it is found in the Arctic Ocean, in areas just below it and in other cold oceans, seas and gulfs; in the Antarctic, it occurs in various areas around Antarctica (the continent). Due to the combined action of winds, currents and air temperature fluctuations, sea ice expanses are very dynamic. In the fall and winter, the ice grows progressively thicker, defining floes of various sizes that collide against each other. This activity also goes on in the spring and summer, but during that time part of the ice melts. This ice may be contrasted with icebergs, which are chunks of ice shelves or glaciers that calve into the ocean. Unlike sea ice, which is saline, icebergs are made from fresh water. They may be enclosed within sea ice expanses and drift along with it.

Read more about Sea Ice:  Types of Sea Ice, Formation of Sea Ice, Yearly Freeze and Melt Cycle, Monitoring and Observations, Modelling, Ecology, Relationship To Global Warming and Climate Change

Famous quotes containing the words sea and/or ice:

    O you singers solitary, singing by yourself, projecting me,
    O solitary me listening, never more shall I cease perpetuating you
    Never more shall I escape, never more the reverberations,
    Never more the cries of unsatisfied love be absent from me,
    Never again leave me to be the peaceful child I was before what
    there in the night,
    By the sea under the yellow and sagging moon,
    The messenger there aroused, the fire, the sweet hell within,
    The unknown want, the destiny of me.
    Walt Whitman (1819–1892)

    People in Stamps used to say that the whites in our town were so prejudiced that a Negro couldn’t buy vanilla ice cream. Except on July Fourth. Other days he had to be satisfied with chocolate.
    Maya Angelou (b. 1928)