Question

1. How do the wind speeds of each typhoon differ before, during and after landfall?

2. What may have caused this change in wind speed?

3. How do landforms affect typhoons? ​

Answer 1

1.Ans A tropical cyclone is a rapidly rotating storm systemcharacterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and/or squalls. Depending on its location and strength, a tropical cyclone is referred to by different names, including hurricane (/ˈhʌrɪkən,-keɪn/), typhoon (/taɪˈfuːn/), tropical storm, cyclonic storm, tropical depression, or simply cyclone. A hurricane is a tropical3 cyclone that occurs in the Atlantic Ocean and northeastern Pacific Ocean, and a typhoon occurs in the northwestern Pacific Ocean; in the south Pacific or Indian Ocean, comparable storms are referred to simply as "tropical cyclones" or "severe cyclonic storms".

2.Ans Earth's Rotation. The rotation of Earth on its axis causes winds to shift direction, creating what are called the prevailingwinds. This wind shift, known as the Coriolis effect, causes winds in the Northern Hemisphere to shift to the right and winds in the Southern Hemisphere toshift to the left.

3.Ans Land masses weaken typhoons, causing them to dissipate if the land mass is large.Typhoons are sustained by deep convection and release of latent heat, and so require warm ocean water to sustain the convection and wind speeds.