profile B between what levels does temperature inversion occur and what does thi
ID: 290585 • Letter: P
Question
profile B
between what levels does temperature inversion occur and what does this imply about the stability of the column? (3 marks)
2- knowing that stability between the 450-350HpA levels is moist nuetral,what does this imply about the likelihood of rainfall occurring on this given day? (3 marks)
3-Given all of the above information about profile B, what time of day do you think that this is occurring and why? (3 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 shows that the temperature inversion occurs between 1000 and 970 hPa levels as the temperature increases with altitude from just above the ground, implying that the air column is stable at the surface till a height of about 400 m (970 hPa of pressure).
The neutral and moist air parcels are situated at 450-350 hPa levels, implying that the moisture capable of producing rainfall is above the inversion layer. Thus there is no chance of air mixing that could generate rainfall on this given day, as the inversion won't allow moist air from above to undergo the necessary vertical mixing needed for rainfall.
The inversion near the ground shows that the cooler surface during nighttime is releasing heat above and warming the atmosphere, thus making the air column stable from the surface till 970 hPa level.
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