April 13, 2016

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Sabe aqueles redemoínhos de wind que carregam tudo por onde passam? Pois é, they are very dangerous. But nem todos eles are the same. Conheça the difference entre Tornadoes and Hurricanes:

 

Qual o sentido da rotation?

No North hemisphere, Hurricanes sempre giram anti-clockwise; no South hemisphere, eles giram clockwise. Isto ocorre because the direction de sua rotation é determined pela rotation da Earth. Já os Tornadoes podem girar no mesmo sentido, mas sometimes giram no sentido opposite, já que a direction de sua rotation é determined pelos local winds – e não apenas pela rotation da earth. Neste caso, são denominados “Anticyclonic” Tornadoes.

 

Where do they form?

Tornadoes se formam during spring, ou no início do summer (North hemisphere). They can form over sea, but they usually form over flat areas of land. Embora ocorram all over the world, they are very frequent in In North America and Canada, onde também são called Twisters.

Já os Hurricanes form over the sea because they need warm water to form. They usually form near the Equator – especially in the Atlantic Ocean, Pacific Ocean, Indian Ocean and Arabian Sea –  e costumam perder a power quando they reach the land.

 

What’s their Speed?

Embora possam cause bastante damage, Tornadoes are smaller e duram apenas some minutes. Sua largura não ultrapassa 1 to 1.5 miles (= 1.6 km  to 2.4 km) e eles usually se movem at around 20 km/h. Já os Hurricanes chegam a atingir de 60 a 1,000 miles de diameter (96,6 km to 1,609 km) de largura. Sua speed pode reach 251km/h.

 

 

This post baseou-se nos texts publicados at http://pmm.nasa.gov/resources/faq/what-difference-between-tornado-and-hurricane, http://www.geography.learnontheinternet.co.uk/topics/tornadohurricane.html, http://www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-are-hurricanes-k4.html, https://www.tropicalweather.net/where-do-hurricanes-occur.html and http://www.answers.com/Q/Do_tornadoes_form_over_land Click to read more about Tornados and Hurricanes.

IMAGE COURTESY:

• http://i.livescience.com/images/i/000/071/998/original/CampoTornado_WilloughbyOwen.jpg?1415746086
• https://i.ytimg.com/vi/syEpfu9WNcQ/hqdefault.jpg
• http://www.youcantcallitit.com/wp-content/uploads/2010/06/hurricane.jpg

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