Contrasting Examples of How Extreme Weather Conditions Develop, Such as Hurricanes and Drought.

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Contrasting examples of how extreme weather conditions develop, such as hurricanes and drought. Hurricanes Conditions needed Hurricanes develop in warm, tropical regions where the water is at least 27 degrees Celsius. The ocean also has to be at least 50m deep. The storms also require moist air and converging equatorial winds. Most begin closer to the equator, starting as thunderstorms that move out over the warm, tropical ocean waters. The rotation of a hurricane is because of the Coriolis force, a natural phenomenon that causes fluids and objects to veer to the right of their destination in the Northern Hemisphere and to the left in the Southern Hemisphere. How they form In the Northern Hemisphere, winds deflect to the right. In the Southern Hemisphere, they deflect to the left. This wind deflection gets storms spinning. As a result, hurricanes in the Northern Hemisphere rotate anti-clockwise, and clockwise in the Southern Hemisphere. The coriolis force is too weak within 5° north or south of the equator for hurricanes to form. Hurricanes often begin their lives as clusters of clouds and thunderstorms called tropical disturbances. These low-pressure areas feature weak pressure gradients and little or no rotation. Most of these disturbances die out, but a few continue down the path to hurricane status. The tropical disturbance advances through three stages to reach hurricane status: 1.Tropical depression: wind speeds of less than 38 mph 2.Tropical storm: wind speeds of 39 to 73 mph 3.Hurricane: wind speeds greater than 74 mph In these cases, the thunderstorms in the disturbance release latent heat, which warms areas in the disturbance. This causes the air density inside the disturbance to lower, dropping the surface pressure. Wind speeds increase as cooler air rushes underneath the rising warm air. As this wind is subject to the Coriolis force, the

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