Weather Hazards
- Created by: liv.moz
- Created on: 08-05-22 15:52
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- Weather hazards
- Global atmospheric circulation
- Helps to determine patterns of weather and climate.
- Large-scale movement of air by which heat and moisture is distributed around the surface of the earth.
- Wind= the movement of air from areas of high to low pressure.
- The wind moves from high pressure to low pressure because air pressure always tries to balance itself.
- 1.Air is heated up by the Earth's surface and rises upwards.
- 2. When reaches top of atmosphere, it moves outwards and begins to cool.
- 3. When it is cool enough the air sinks back to the surface.
- 4. When reaches the surface, the air moves outwards along the surface and begins to warm up
- 3. When it is cool enough the air sinks back to the surface.
- 2. When reaches top of atmosphere, it moves outwards and begins to cool.
- Coriolis effect
- Winds move to the right of the Northern hemisphere and move to the left in the southern hemisphere.
- The spinning of the earth creates the coriolis effect.
- Its what gets a tropical storm spinning.
- Tropical storms
- an area of low pressure with winds moving in a spiral around a calm central point called the eye of the storm- winds are powerful and rainfall is heavy.
- They happen in the tropics just North and South of the equator, where coriolis effect is srtong enough to make the storm spin.
- NOT ON THE EQUATOR.
- 1.They form in the summer and autumn. The temperature of the water has to be atleast 27 degrees.
- 2.The warm air rises quickly causing an area of low pressure.
- 3.As air continues to rise quickly, it draws more warm moist air up from above the ocean leading to strong winds
- 4.Rapidly rising warm air spirals upwards, cools, condences and large clouds form.
- 5.Clouds produce eye wall of the storm and produce heavy rainfall.
- 6.In centre of storm cold air sinks forming the eye of the storm.
- 5.Clouds produce eye wall of the storm and produce heavy rainfall.
- 4.Rapidly rising warm air spirals upwards, cools, condences and large clouds form.
- 3.As air continues to rise quickly, it draws more warm moist air up from above the ocean leading to strong winds
- 2.The warm air rises quickly causing an area of low pressure.
- A huge whirlpool- gigantic mass of revolving moist air.
- Primary effects: destructive winds, debri, storm surges.
- Secondary effects: flooding, fires.
- Immediate responses: warnings, evacuations, emergency aid supplies, food and water.
- Long-term responses: rebuilding infrastructure, storm surge warning systems.
- Climate change
- As global warming causes ocean temperatures to rise, it could mean that tropical storms will be able to form outside the current hazard zone.
- UK
- Types of extreme weather: storms, hurricanes, floods, extreme winds, extreme heat, snow, drought.
- Global atmospheric circulation
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