Consider the following statements about the formation of Tropical Cycl...
All statements are correct except statement 1.
There should be continuous supply of abundant warm and moist air for formation of tropical cyclones.
- Generally Absolute humidity does not change with increase or decrease of temperature , if no additional vapour is added through additional evaporation, but it changes with contraction (after decent) or expansion (on ascent) of air.
- Specific humidity is seldom affected by changes in air pressure or air temperature because it is measured in units of weight (grams). It is directly proportional to vapour pressure, which is the partial pressure exerted by water vapour in the air and is independent of other gases and is inversely proportional to air pressure.
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Consider the following statements about the formation of Tropical Cycl...
Explanation:
1. Continuous supply of abundant dry and cold airmass: Tropical cyclones are formed over warm ocean waters with temperatures of at least 26.5 degrees Celsius. The warm air at the ocean surface rises, creating an area of low pressure below. As the air rises, it cools and condenses, forming clouds and releasing heat. This process requires a continuous supply of warm, moist air to sustain the cyclone. Therefore, the statement that there should be a continuous supply of abundant dry and cold airmass is incorrect.
2. Higher value of Coriolis force: The Coriolis force is an effect caused by the rotation of the Earth, which causes moving air to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. A higher value of the Coriolis force is indeed required for the origin of tropical cyclones, as it helps in the rotation and organization of the storm system.
3. Association with the inter-tropical convergence (ITC): Tropical cyclones are associated with the inter-tropical convergence zone (ITCZ), which is a region near the equator where the trade winds from both hemispheres converge. This convergence leads to the uplift of warm, moist air and the formation of thunderstorms, which can develop into tropical cyclones. The ITCZ typically extends from 5-30 degrees N latitudes during the summer season, providing a favorable environment for cyclone formation.
Therefore, the correct statements are 2 and 3 only, making option B the correct answer.