1. Presence of the Coriolis force
2. Upper divergence above the sea level system
3. High variations in the vertical wind speed
Which of the conditions given above is/are correct?
Understanding Tropical Storm Formation Conditions
Tropical storms, like hurricanes and typhoons, require specific atmospheric conditions to form and strengthen. Let's analyze the conditions provided:
Analyzing Favourable Conditions for Tropical Storms
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Condition 1: Presence of the Coriolis Force
The Coriolis force is essential for initiating the rotation of air around the low-pressure center characteristic of a tropical storm. This force, caused by the Earth's rotation, deflects moving air (to the right in the Northern Hemisphere and to the left in the Southern Hemisphere). Without this force, air would flow directly into the low-pressure center, and a organized, rotating storm system would not develop. It's important to note that the Coriolis force is very weak at the equator, which is why tropical storms typically form at least a few degrees latitude away from it.
Therefore, the presence of the Coriolis force is a necessary condition.
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Condition 2: Upper Divergence Above the Sea Level System
Upper divergence refers to the outward spreading of air in the upper levels of the atmosphere above the developing storm. As warm, moist air rises within the storm's core (convection), it reaches the upper atmosphere. For the storm to intensify, this rising air needs to be removed efficiently. Upper divergence provides this outflow mechanism. It helps to ventilate the storm, maintaining the low pressure at the surface and allowing more air to flow in and rise, further fueling the storm's development.
Hence, upper divergence is a favorable condition.
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Condition 3: High Variations in Vertical Wind Speed
Variations in vertical wind speed are often referred to as vertical wind shear. High vertical wind shear means that the wind speed and/or direction changes significantly with height. Strong vertical wind shear is detrimental to the formation and intensification of tropical storms. It can tilt the storm's vertical structure, disrupt the organized convection, and inhibit the development of a strong low-level circulation. Meteorologists prefer conditions with low vertical wind shear for tropical storm development.
Consequently, high variations in vertical wind speed (strong shear) are unfavorable.
Conclusion on Favourable Conditions
Based on the analysis, the conditions that are favorable for the formation and intensification of tropical storms are:
- The presence of the Coriolis force (Condition 1).
- Upper divergence above the sea level system (Condition 2).
Condition 3, high variations in vertical wind speed (strong shear), is unfavorable.
Therefore, the correct conditions are 1 and 2.
Similar Questions
- Consider the following statements regarding extratropical cyclones :
I. They usually develop in the mid and high latitudes.
II. They affect a much larger area as compared to tropical cyclone.
III. They move from east to west.
Which of the statements given above are correct? - Which of the following are the factors that cause variation in the amount of insolation on the Earth?
1. Rotation of the earth on its axis
2. Length of the day
3. Distribution of land and water on the earth
Select the answer using the code given below: Which of the following is/are the applied forces in mechanical weathering process?
1. Gravitational force
2. Expansion force
3. Force due to water pressure
Which one of the following latitudes will experience a minimum angle of the Sun’s rays when it is Summer Solstice in the Northern Hemisphere?
Which of the following is/are cold ocean current/currents?
1. Alaska Current
2. North Atlantic Drift
3. West Wind Drift
Which of the following statements with reference to Coriolis force is/are correct?
1. Coriolis force acts perpendicular to the pressure gradient force
2. At the equator, the Coriolis force is zero and the wind blows perpendicular to the isobars
Condensation of water vapour into water is influenced by which of the following factor/factors?
1. Volume of air
2. Humidity
3. Temperature
Important Questions from Climatology
In the context of climate, what is the full form of ITCZ?
With reference to the climatic conditions of the Prairies, which of the following statements is correct?
Land and sea breeze are caused due to _____________
Which island emerged in the Bay of Bengal in the after math of the Bhola cyclone in 1970?
In India, during October-November, with the apparent movement of the sun towards the south, the ______ over the northern plains becomes weaker.
