Which of the following conditions are favourable for formation of Tropical cyclones are
1. Temperature lower than 180 C
2. Absence of coriolis force
3. High vertical wind shear.
Which of the following options are correct?
Which of the following conditions are favourable for formation of Tropical cyclones are
1. Temperature lower than 180 C
2. Absence of coriolis force
3. High vertical wind shear.
Which of the following options are correct?
The correct option is D None of the above
While these conditions are necessary for tropical cyclone formation, they do not guarantee that a tropical cyclone will form. There are six main requirements for tropical cyclogenesis:
1. sufficiently warm sea surface temperatures (SST > 26°C to a depth of 60 m)
2. atmospheric instability,
3. high humidity in the lower to middle levels of the troposphere,
4. enough Coriolis force to sustain a low pressure center,
5. a preexisting low level focus or disturbance, and
6.low vertical wind shear.
While six factors appear to be generally necessary, tropical cyclones may occasionally form without meeting all of the following conditions.
1. In most situations, water temperatures of at least 26.5 °C (79.7 °F) are needed down to a depth of at least 50 m (160 ft); waters of this temperature cause the overlying atmosphere to be unstable enough to sustain convection and thunderstorms.
2. Another factor is rapid cooling with height, which allows the release of the heat of condensation that powers a tropical cyclone.
3. High humidity is needed, especially in the lower-to-midtroposphere; when there is a great deal of moisture in the atmosphere, conditions are more favorable for disturbances to develop.
4. Low amounts of wind shear are needed, as high shear is disruptive to the storm's circulation.
5. Tropical cyclones generally need to form more than 555 km (345 mi) or five degrees of latitude away from theequator, allowing the Coriolis effect to deflect winds blowing towards the low pressure center and creating a circulation.
Lastly, a formative tropical cyclone needs a preexisting system of disturbed weather. Tropical cyclones will not form spontaneously. Low-latitude and low-level westerly wind bursts associated with the Madden-Julian oscillation can create favorable conditions for tropical cyclogenesis by initiating tropical disturbances.
None of the above
While these conditions are necessary for tropical cyclone formation, they do not guarantee that a tropical cyclone will form. There are six main requirements for tropical cyclogenesis:
1. sufficiently warm sea surface temperatures (SST > 26°C to a depth of 60 m)
2. atmospheric instability,
3. high humidity in the lower to middle levels of the troposphere,
4. enough Coriolis force to sustain a low pressure center,
5. a preexisting low level focus or disturbance, and
6.low vertical wind shear.
While six factors appear to be generally necessary, tropical cyclones may occasionally form without meeting all of the following conditions.
1. In most situations, water temperatures of at least 26.5 °C (79.7 °F) are needed down to a depth of at least 50 m (160 ft); waters of this temperature cause the overlying atmosphere to be unstable enough to sustain convection and thunderstorms.
2. Another factor is rapid cooling with height, which allows the release of the heat of condensation that powers a tropical cyclone.
3. High humidity is needed, especially in the lower-to-midtroposphere; when there is a great deal of moisture in the atmosphere, conditions are more favorable for disturbances to develop.
4. Low amounts of wind shear are needed, as high shear is disruptive to the storm's circulation.
5. Tropical cyclones generally need to form more than 555 km (345 mi) or five degrees of latitude away from theequator, allowing the Coriolis effect to deflect winds blowing towards the low pressure center and creating a circulation.
Lastly, a formative tropical cyclone needs a preexisting system of disturbed weather. Tropical cyclones will not form spontaneously. Low-latitude and low-level westerly wind bursts associated with the Madden-Julian oscillation can create favorable conditions for tropical cyclogenesis by initiating tropical disturbances.
