Given both profiles (A and B), w hich profile is likely to have come from the su
ID: 290583 • Letter: G
Question
Given both profiles (A and B), which profile is likely to have come from the subtropics? Why? (5 marks)
Profile A Dewpoint Pressure Temperature (Ta) Temperature (Td) 7.0 6.0 8.0 6.0 5.0 2.0 10.0 20.0 21.0 22.0 -24.0 25.0 29.0 33.0 40.0 46.0 25.0 20.0 22.0 19.0 14.0 11.5 9.0 6.0 1000 970 930 900 850 800 750 700 650 600 550 500 450 400 350 300 0.5 5.0 9.5 15.0 22.0 30.0 39.0 Profile B Dewpoint Pressure Temperature (Ta) Temperature (Td) 1000 26.5 29.0 25.5 23.0 20.0 15.5 13.0 9.0 7.5 3.5 1.0 23.0 17.0 17.5 19.0 17.0 14.0 13.0 7.5 6.0 3.5 970 930 900 850 800 750 650 600 550 500 450 400 350 300 -13.0 20.0 30.0 -34.5 -41.0 -15.0 -22.5 30.0Explanation / Answer
Profile B indicates the sub tropic region.
Dewpoint is the temperature to which the air would have to cool to become saturated with water vapor, if we cool it further, water vapor starts to condense to form liquid water. dewpoint indicates the amount of watervapor present in the atmosphere, if the water vapor is low the dew point also will be low (air has to cool more to condense the water) these are found in hot arid regions like deserts or in the polar regions. if the dew point is high it indicate the surplus amount of water vapor in the atmosphere and this makes the condensation fast, these regions are found in tropical-subtropical regions, because of the high evaporations rate due to the more incident sunlight, the amount of water vapor in the air is high.
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