Environment #Geography ■Typhoon In-fa hits China's east coast

 #Environment #Geography 

■Typhoon In-fa hits China's east coast


✅The typhoon made landfall in Zhoushan in Zhejiang Province.

✅The typhoon was filled with winds running at 155 kilometres (95 miles) per hour and gusts up to 191 kph (120 mph).

✅No deaths or injuries were reported.

●Tropical Cyclone:

✅A tropical cyclone is the generic term for a non-frontal low-pressure system over tropical or sub-tropical waters with organized convection and definite cyclonic surface wind circulation

✅Hurricanes, cyclones and typhoons are all types of tropical cyclones but are given different names depending on where they appear.

✅Hurricanes are tropical storms that form over the North Atlantic Ocean and Northeast Pacific.

✅Cyclones are storms formed over the South Pacific and Indian Ocean.

✅Typhoons are storms formed over the Northwest Pacific Ocean.

●Life-cycle of Cyclone:

✅Tropical cyclones form only over warm ocean waters near the equator.

✅Warm, moist air over the ocean rises upward from near the surface.

✅As this air moves up and away from the ocean surface, it leaves less air near the surface. So basically as the warm air rises, it causes an area of lower air pressure below.

✅Air from surrounding areas with higher air pressure pushes in to the low pressure area.

✅This new "cool" air becomes warm and moist and rises, too and cycle continues.

✅As the warmed, moist air rises and cools the water in the air forms clouds.

✅The whole system of clouds and wind spins and grows, fed by the ocean's heat and water evaporating from the ocean surface.

✅As the storm system rotates faster and faster, an eye forms in the centre. It is very calm and clear in the eye, with very low air pressure.

✅Higher pressure air from above flows down into the eye.

✅When the winds in the rotating storm reach 39 mph (63 kmph), the storm is called a "tropical storm".

✅And when the wind speeds reach 74 mph (119 kmph), the storm is officially a "tropical cyclone" or hurricane.

✅Tropical cyclones usually weaken when they hit land, because they are no longer being "fed" by the energy from the warm ocean waters."


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