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Dew point Calculation-Please help me

  1. Feb 7, 2010 #1
    Dew point Calculation-Please help me!!!

    1. The problem statement, all variables and given/known data
    Consider a strong wind aloft that forces air to flow over the mountains from A to E, as in the diagram below. Assume the surface temperature at A is 21 degrees C and the dew point temperature is 5 degrees C; and that any moisture that condenses out of the air falls as precipitation and is left behind. The elevations are: A – 0 m; B – 3000 m; C – 1000 m; D – 5000 m; E – 500 m.

    (i) What are the temperatures and dew point temperatures at B, C, D and E?
    (ii) Identify where clouds are formed (hint: this is important to part (i).
    (iii) How would your answer for E be different if there was no valley at C; that is, if the air flowed upward all the way from A to D?

    2. Relevant equations
    DALR = 10.0 degrees C/km (Dry adiabatic lapse rate)
    MADR = 6.0 degrees C/km (Moist adiabatic lapse rate)
    DWLR = 2.0 degrees C/km (Dew point lapse rate)

    3. The attempt at a solution

    I really DOnt know how to start this question, i think the clouds are formed on the left side of the moutain.
  2. jcsd
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