Presentation Transcript

1. WEATHER DISTURBANCE By: Klaus Austin Fuentes Jan Michael G. Gaite

2. WEATHER DISTURBANCE • a general term that describes any pulse of energy moving through the atmosphere. • they can act as focusing mechanisms for storm formation, or even to intensify low pressure systems

3. TYPES OF WEATHER DISTURBANCES • Typhoon/Hurricane • Tropical Cyclones • Tornado

4. Typhoon/Hurricane • A large heat engine, where great amounts of heat are being produced from the process of latent heat of condensation. • occurs as water vapor is being evaporated from the ocean surface and condensed into cloud droplets.

5. Causes of typhoon/hurricane: • Pre-existing disturbance • Warm ocean water • Low atmospheric stability • Sufficient Coriolisforce • Low vertical wind shear • Upper atmosphere divergence * Coriolis force - an apparent force that as a result of the earth’s rotation deflects moving objects to the right in the northern hemisphere and to the left in the southern hemisphere.

6. Tropical Cyclones - a storm system characterized by a low-pressure center and numerous thunderstorms that produce strong winds and heavy rain.

7. Causes of tropical cyclones: • Water temperatures of at least 26.5 °C (79.7 °F)  • Rapid cooling with height • High humidity • Low amounts of wind shear  • A need to form more than 555 km (345 mi) or 5 degrees of latitude away from the equator • pre-existing system of disturbed weather

8. Tornado - rotating columns of air usually produced by severe thunderstorms.

9. Multi vortex tornadoes –mini tornadoes circulating around a larger one. WATERSPOUT - tornadoes form over water. LANDSPOUT - tornadoes form over land.

10. How tornadoes are formed?- most tornadoes actually form from the ground up. It is simply highly saturated air dropping from the thunderstorm which gives the appearance of a tornado “touching down”.

11. How fast do tornadoes move?- a tornado on average moves at speeds of 30mph, but can range stationary to about 70mph.

12. END