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Tropical Cyclones Grade 5 Science St. Therese.pptx
- 1. MEET YOUR SCIENCE TEACHER Ms. Monderin
- 7. A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms. Tropical Cyclones: Grounds of rotating, low- pressure storms that form around the equator.
- 8. Named according to region where they develops: Develop over the Indian Ocean on worm waters Develop over Atlantic and eastern Pacific Oceans Develop over western Pacific Oceans All produce similar effects Typhoon Odessa, Philippines Eye
- 15. The strongest of these cyclones’ storms are known in the US and other parts of the Atlantic ocean.
- 16. Progression: depression storm cyclone Classified according to wind speeds Tropical Depression - less than 39 m/h Tropical Storm - between 39 m/h and 73 m/h Tropical Cyclone - at least 74 m/h
- 17. Tropical cyclones are intense, rotating, low- pressure storms Develop over warm, tropical oceans Produce strong winds and heavy rainfall Can lead to immense flooding Destructive Winds
- 18. Tropical Cyclones require to basic conditions to form: an abundant supply of very warm ocean water and some sort of disturbance to lift warm air and keep it rising.
- 19. Warm water generates formation of tropical cyclones Ocean temperatures must be at least 26.5°C which is worm Over warm oceans moist, humid air (water vapour) Warm air moves along the surface This air converges and rises rapidly Intense rising of air forms low pressure systems
- 20. As air rises, it cools, becomes saturated and condenses Water vapour condenses into liquid droplets Formation of thunderclouds Condensation releases heat stored in water vapour This latent heat warms the atmosphere Air becomes lighter causing strong updrafts
- 21. Air expands and diverges at higher levels Occurs only where wind speed/direction remain constant (no wind shear) Air moves in at surface taking the place of rising air This intensifies convergence Creates wind and increases rising movement Builds and progresses into a mature cyclone
- 22. Spinning of earth on its axis produces wind deflections (Coriolis Effect) Causes rising air to spiral around center (core) Spirals with great force Winds are now rotating, rising and moving in to fill spaces Wind speeds increase and cyclone grows
- 23. These conditions exist in all tropical oceans except the south Atlantic ocean and the pacific, west of the South American coast ocean waters in these areas are somewhat cooler.
- 24. winds are blowing counter- clockwise around center core winds are blowing clockwise around center core
- 25. the clear, calm center of storm Cool air descends into this center (downdrafts) ring of thunderstorms close to eye Eyewall produces the most devastating winds curved groups of clouds and thunderstorms Rainbands travel away from eye in a spiral motion
- 26. Occur when tropical cyclones reach land Storm surge – raised swell of water 60 to 80 km across Around 2 to 5 meters higher than normal tides Created by heavy winds and cause flooding
- 27. Between 10 to 30° North and South of equator Within the tropic of Cancer and Capricorn Poleward side of the Intertropical Convergence Zone Zone of low pressure (ITCZ) Coriolis effect greatly reduced at equator No tropical cyclones occur at equator Tropical Cyclone Appearances ITCZ
- 29. Storm Survivors
- 30. November 12, 1970 The deadliest tropical cyclone recorded Developed over Bay of Bengal Gathered speed as it moved northward Devastated East Pakistan (Bangladesh) and West Bengal of India. Storm Path India Bay of Bengal
- 31. Wind speeds reached 115 m/h Strength of a category 3 hurricane 33 foot high storm surge Massive storm surge caused flooding and fatalities. Bhola Cyclone on November 11, 1970
- 33. 1. B 2. D 3. A 4. D 5. A
- 34. ●What will happen if people continue to ruin the environment?
Editor's Notes
- A tropical cyclone is a powerful storm system that forms over warm ocean waters near the equator, characterized by a large low-pressure center and organized thunderstorms that rotate around it. These rotating, low-pressure storms develop due to the warm ocean waters providing the energy needed for their formation. The Earth's rotation influences the direction of their spin, with counterclockwise rotation in the Northern Hemisphere and clockwise rotation in the Southern Hemisphere. Tropical cyclones can bring strong winds, heavy rainfall, storm surges, and flooding, making them dangerous and destructive natural disasters that require preparedness and caution, especially for those living in coastal areas prone to these storms.
- Cyclones, hurricanes, and typhoons are all names for tropical cyclones that develop in different regions of the world but share similar characteristics and effects. Cyclones form over the warm waters of the Indian Ocean, hurricanes develop over the Atlantic and eastern Pacific Oceans, and typhoons originate in the western Pacific Ocean. Despite their regional names, these storms are all intense low-pressure systems with rotating winds and organized thunderstorms that can bring strong winds, heavy rainfall, storm surges, and flooding. The destructive impacts of cyclones, hurricanes, and typhoons are similar, posing significant risks to coastal communities and requiring preparedness and response efforts to mitigate their effects and protect lives and property.
- GENTLENESS 1 1 2 4 3 4 4 3 5 1 6 a 7 8 5 9 3 10 3 11 2 12 4 13 2 14 3 15 2 16 a 17 3 18 5 19 4 20 4 21 3 22 3 23 3 24 2 25 5 26 3 27 5 28 3 29 2 30 2 31 3 32 2 33 4 34 4 35 2 36 3 37 4 38 3 CLEANLINESS 1 3 2 3 3 3 4 2 5 4 6 7 2 8 2 9 2 10 3 11 3 12 4 13 1 14 4 15 3 16 2 17 3 18 a 19 2 20 2 21 1 22 3 23 4 24 3 25 3 26 2 27 3 28 5 29 3 30 2 31 2 32 3 33 4 34 a 35 3 36 3 37 2 38 3 HELPFULNESS 1 4 2 3 3 2 4 5 1 6 1 7 8 3 9 a 10 5 11 12 5 13 4 14 3 15 2 16 3 17 2 18 4 19 a 20 a 21 3 22 3 23 4 24 4 25 2 26 3 27 3 28 2 29 30 3 31 a 32 4 33 4 34 5 35 4 36 5 37 3