Frozen oceans: the floating world of pack ice.

London: Natural History Museum of Los Angeles County, 2004.
Octavo, laminated boards, 224 pp. colour photographs.

Pack ice, or sea ice is a layer of frozen seawater on the top of the polar oceans, varying in thickness from a few centimetres to 10s of metres. At its maximum extent it covers 13% of the Earth's surface area, making it one of the major biomes on the planet. This gives rise to a spectacular floating world that for a number of months each year becomes home to a wealth of plant and animal life.