GEOG220 Lecture 17: geog220 410
28 Jul 2018
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No: the rate at which the dew point temperature changes with elevation is a complicated function of the moisture content of the rising air parcel. However, the rate is generally assumed to be about 2 c/1000m. We can express the relationship for finding the height of the convective cloud base in formula form : h(meters) = 125m(t-td) (t and td in celsius, h(feet) = 222ft(t-td) (t and td in fahrenheit) If t = 35 c and td = 15 c what is the height of the convective cloud base: h(m) = 125* (35-15) = 25 m. If t = 65 f and td = 60 f what is the height of the convective cloud base: 222ft(t-td, 222ft(65-60) = 1110 ft. What do you notice about the relationship between the dew point depression and the height of the convective cloud base: h(meters) = 125m(t-td) (t and td in celsius, h(feet) = 222ft(t-td) (t and td in fahrenheit)
