1. Thickness of the troposphere is greatest at the equator
2. The air temperature of the tropo-pause is highest above the poles
3. The temperature in troposphere decreases at the rate of \(1^\circ\)F for every \(165\) m of height
Which of the statements given above is/are correct?
1 and 2 only
The question inquires about the structure of the Earth's atmosphere, specifically focusing on the troposphere and tropopause. Let's evaluate each statement individually:
- Thickness of the troposphere is greatest at the equator: This statement is true. The thickness of the troposphere varies, being greatest at the equator due to the intense heat and resultant expansion of the air. The troposphere extends to about 18 km at the equator compared to about 8 km at the poles.
- The air temperature of the tropo-pause is highest above the poles: This statement is correct. The temperature at the tropopause is actually warmer (less cold) above the poles compared to the equator due to the difference in altitude and temperature gradients at different latitudes.
- The temperature in the troposphere decreases at the rate of \(1^\circ F\) for every \(165\) m of height: This statement is incorrect. The typical lapse rate in the troposphere is about \(6.5^\circ C\) per \(1000\) m, which translates to approximately \(3.5^\circ F\) per \(1000\) feet, not per \(165\) m. Therefore, the rate given in the statement is incorrect.
Based on this analysis, the statements that are correct are 1 and 2. Hence, the correct answer is Option "1 and 2 only".
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I. They usually develop in the mid and high latitudes.
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III. They move from east to west.
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