Yearly Freeze and Melt Cycle
Sea ice freezes and melts due to a combination of factors, including the age of the ice, air temperatures, and solar insolation. During the winter the area of the Arctic Ocean covered by sea ice increases, usually reaching a maximum extent during the month of March. The area covered in sea ice then decreases, reaching its minimum extent in September most years. First-year ice melts more easily than older ice for two reasons: 1) First-year ice is thinner than older ice, since the process of congelation growth has had less time to operate; and 2) first-year ice is less permeable than older ice, so summer meltwater tends to form deeper ponds on the first-year ice surface than on older ice, and deeper ponds mean lower albedo and thus greater solar energy capture.
Read more about this topic: Sea Ice
Famous quotes containing the words yearly, freeze, melt and/or cycle:
“What is last year’s snow to me,
Last year’s anything? The tree
Budding yearly must forget
How its past arose or set—”
—Countee Cullen (1903–1946)
“I sat at a table where were rich food and wine in abundance, and obsequious attendance, but sincerity and truth were not; and I went away hungry from the inhospitable board. The hospitality was as cold as the ices. I thought that there was no need of ice to freeze them.”
—Henry David Thoreau (1817–1862)
“She looked as though butter wouldn’t melt in her mouth—or anywhere else.”
—Elsa Lanchester (1902–1986)
“The Buddha, the Godhead, resides quite as comfortably in the circuits of a digital computer or the gears of a cycle transmission as he does at the top of a mountain or in the petals of a flower.”
—Robert M. Pirsig (b. 1928)