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1. Using a moist skew-T diagram, answer the following questions for an air parce

ID: 160589 • Letter: 1

Question

1. Using a moist skew-T diagram, answer the following questions for an air parcel with a temperature of 28oC and a dewpoint of 20oC at a pressure of 1000 hPa on a late summer afternoon.

a. What is the mixing ratio of the parcel?  

b. What is the saturation mixing ratio of the parcel?  

c. What is its relative humidity according to the WMO? RHWMO =w/wsat  

d. What is its vapor pressure? Compare your answer to the value using the Clausius-Clapeyron equation.  

e. What is the saturation vapor pressure? Compare your answer to the exact value using the Clausius-Clapeyron equation.  

Explanation / Answer

w=621.97* [ e/(Psta-e) ]

ws=621.97*[es/(Psta-es)]

RH= w/ws*100

saturated mixing ratio=24.37g/kg

actual mixing ratio=14.86g/kg

relative humidity=60.99%