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Hurricane
Hurricane
A very fierce, damaging wind of the tropics and subtropics. The general term hurricane also refers to a tropical cyclone in North America (Beaufort scale 12+). (See also: Eye; Eyewall; and Hurricane-force winds.)
 Hurricane – As the winds spiral in a hurricane, they form regions of upwards-moving air separated by regions where air moves downwards. Where the air is moving up, huge walls of cumulonimbus clouds form. In the centre of the hurricane is the clear region called the eye.
Cloud-free eye
Sea
Spiralling winds
Rising air
Direction of hurricane movement
Hurricane-force winds
Winds whose speeds exceed I
117km/h.
Ice
The solid form of water. Sheets of ice often develop on land where rain occurs on cold ground.
Ice climate
A very cold, polar climate with average monthly temperatures never climbing above 6°C. Characterised by permanent ice and permafrost, a layer of frozen ground that never thaws.
 Ice – Surface ice is a common phenomenon in winter for places that have long cold spells separated by warm, rainy weather. The rain freezes on the frozen ground, making driving hazardous.
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