13. Which statement is false? For hurricanes to develop: (a) The surface layer o
ID: 293713 • Letter: 1
Question
13. Which statement is false? For hurricanes to develop: (a) The surface layer of warm water in the ocean must be deep, at least 200 ft or more. (b) The winds in the atmosphere must change substantially with height (strong vertical wind shear). (c) The sea surface temperature must exceed 80°F. (d) The location must be at least a few degrees north or south of the equator 14 17; Identify the different parts of a hurricane. NDRA 14 16 17 15 14. (a) The Eye (b) Eye Wall 15. (a) The Eye (b) Eye Wall 16. (a) The Eye (b) Eye Wal 17. (a) The Eye (b) Eye Wal (c) Central Dense Overcast (d) Spiral Rain Bands (c) Central Dense Overcast (c) Central Dense Overcast (c) Central Dense Overcast (d) Spiral Rain Bands (d) Spiral Rain Bands (d) Spiral Rain Bands side. 18. A northward moving hurricane will have the strongest winds on its (a) eastern (b) western (c) southern (d) northern e ifithas: 19. A tropical cyclone will be classified as a hurrican (a) a sustained wind speed of at least 74 mph (b) a sustained wind speed of at least 120 mph. (c) wind gusts of at least 39 mph. (d) wind gusts of at least 74 mph. (e) wind gusts of at least 120 mph.Explanation / Answer
13. For hurricanes to develop, warm layer in the ocean must be deep to provide the thermal energy, vertical wind shear must be very less in order to promote vertical convective motion, SST must be at least 80F and the location must be off the equator for generating rotation due to Coriolis force. So, the statement in option B) is false.
14. d) spiral rainbands tend to form where the temperature gradient is maximum and there is plenty of rain and thunderstorm activity.
15. a) the zone of lowest pressure appearing darker is known as the eye.
16. b) the region bordering the zone of lowest pressure is the eyewall.
17. c) Central dense overcast conditions, appearing as thick clouds, dominate as the hurricane matures over time.
18. A northwards moving hurricane will have the strongest winds on its eastern side as the velocity of the anticlockwise moving winds will be further enhanced by the speed of the moving hurricane. The other three directions will have lesser speeds due to the differences in relative velocity of the winds and the entire hurricane system. So, option a) is correct.
19. According to Saffir-Simpson Scale, for a Cat-1 hurricane, the maximum sustained wind speed must not be less than 74 mph. This is the most important criterion for identifying a hurricane in terms of winds. So, option a) is correct.
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