Vida Natural 8ª C

Hurricanes

The hurricanes form later that the rays of the Sun happen during some days on the ocean, provoking the heating of the situated air mass next to its liquid surface, when its humidity if raises. The more hot and humid air goes up, more the temperature diminishes what it favors the condensation of the vapor in rain drops to form clouds. The more humidity and heat to exist, more evaporation will go to occur, what it could provoke the sprouting of some hundreds of storms.

Two are the essential conditions for the formation of an hurricane. In first place, the evaporation of water mass, beyond being enough, must occur above of the oceans, where the temperature varies between 26,5º C and 27ºC. This last condition explains why the hurricanes if always form next to the tropics. By the way, water is the set free heat for occasion of the condensation of vapor d that of to the hurricane its power. In according to place, the storm mass must be placed or if dislocate 5º of latitude north or south

















Types Of Hurricanes:

Hurricane: strong circular wind, with the 108 equal or superior speed km/h. The hurricanes are the cyclones that appear in the Caribbean sea (Atlantic Ocean) or in U.S.A. The 119 more than winds need to have km/h a storm to be considered an hurricane. They turn in clockwise (in the South hemisphere) or the counter-clockwise one (in the hemisphere North) and measure of 200 the 400 km diameter km. Its curve if is similar to a parabolic one.













Cyclone: it is the generic name circular winds, as tufão, hurricane, become and willy-willy. It is characterized for a violent storm that occurs in tropical or subtropical regions, produced for great air masses in high speed of rotation. The 50 winds surpass them km/h.











typhoon: it is the name that if of to cyclones formed in the south of Asia and the part the occidental person of the Indian ocean, between July and October. It is the same that hurricane, only that in the equatorial region of the Pacific Ocean. The tufões appear in the sea of China and reach the Asian east.


Gale: strong wind with a great power of destruction, that arrives to reach up to 150 km/h. It occurs generally of dawn and its duration can be of up to five hours.


Willy-Willy: name that the cyclones receive in Australia and too much countries from the south from the Oceania.


Destruction Caused For Hurricanes:

12 Of November Of 1970 East Of the Pakistan:
It killed of 300 the 500 a thousand people

Shaturia, Bangladesh, 26 of April of 1989:
It killed Around 1.300 People, and It unsheltered 50 A thousand People.

Phillipino the two of September of 1985:
It killed 1363 People, It wounded 300 and It left 1,12 Million Homelesses