2018 · Q51
Which of the following statements about tropical cyclone are correct?
- 1It originates and develops over warm oceanic surface.
- 2Presence of Coriolis force is necessary for it.
- 3It occurs in middle latitudinal region.
- 4It develops “eye” with calm and descending air condition.
Select the correct answer using the code given below.
indian-world-geographyclimatology
- A1 and 2 only
- B1, 2 and 4
- C3 and 4 only
- D2, 3 and 4
Explanation
Tropical cyclones form over warm ocean surfaces above about 27°C (1 true) and need the Coriolis force to develop their spin — which is why they never form at the equator (2 true). They occur in tropical, not middle-latitude, regions (3 false). The 'eye' is the calm central region of descending air (4 true). Hence statements 1, 2 and 4 are correct.