Hi Everyone, I am really having a tough time with the below question. http://www

Question

Hi Everyone, I am really having a tough time with the below question. http://www.chegg.com/homework-help/accompanying-graph-shows-air-temperature-relative-humidity-c-chapter-17-problem-8GT-solution-9780321958006-exc To determine the temperature and dew point temperatures for each location B through G. I realize that the dry adiabatic rate is 10 Degrees C and the wet adiabatic rate is 5 degrees C. Does the dew point temperature change at the same rate? How would we know what altitudes on the image are wet or dry? How would we know when the clouds would form? Would it be when relative humidity reaches 100%? How would we determine that? Please help, Jeff

Explanation / Answer

Point B = Point A - 10 = 27 - 10 = 17 (temperature decreases at DALR)
Point B = 17 = dew point temperature ==> clouds
Point C = 17 - 5 = 12 (temperature decreases at MALR)
Point D = 12 - 5 = 7 (temperature decreases at MALR)
Point E = 7 + 10 = 17 (temperature increases at DALR)
Point F = 17 + 10 = 27 (temperature increases at DALR)
Point G = 27 + 10 = 37 (temperature increases at DALR)

Till the point where dew point temperature occurs, the temperature decreases by dry adiabatic rate. So at point B, the temperature equals dew point temperature. Here clouds start forming. After that temperaturr at each point decreases by wet adiabatic rate. After the peak point, it again increases by dry adiabatic rate.

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