DPT and Uplift of an Air Mass 16. Our ground level instruments are checked at 10
ID: 114167 • Letter: D
Question
DPT and Uplift of an Air Mass 16. Our ground level instruments are checked at 10:00am under clear sky conditions. They indicate the following: T 35°C and SH 12 g/kg. A Thermal Low Pressure system creates uplift of the air mass. Assuming SH remains stable, at what altitude will the air mass reach Lifting Condensation Level (LCL) and Cloud Formation will occur? Apply the Dry Adiabatic Rate (DAR) to calculate your answer 17. Consider the same air mass from question 16: the velocity of uplift is measured at 300 meters per hour. At what time can we expect cloud formation? 18. Assuming the air mass from question 16 continues its uplift past the LCL, at what alititude willExplanation / Answer
17. Height needed to ascend=186.2km or 186.2*1000 meter
velocity of uplift= 300 meter/ hour
time needed to ascend= height/ velocity of uplift
= 186200/300
= 620 hr
18. height needed for reaching 0 degree C= DAR * (35-0)
= 9.8*35
= 343 KM
17. Height needed to ascend=186.2km or 186.2*1000 meter
velocity of uplift= 300 meter/ hour
time needed to ascend= height/ velocity of uplift
= 186200/300
= 620 hr
18. height needed for reaching 0 degree C= DAR * (35-0)
= 9.8*35
= 343 KM
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