Elements of Meteorology Notes for Exam 2

Elements of Meteorology Notes for Exam 2 - Meteorology...

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Meteorology Notes 4:26 PM4:26 PM Tuesday, October 9, 2007 Computation of Relative Humidity Suppose it is snowing outside and the air is saturated. The air temperature and dew point are 28F, and the actual mixing ration is 3 g/kg. If this air is brought indoors and warmed to 70F, what would be the new relative humidity of the air if its moisture content does not change? (the saturation mixing ratio at 70F is 16 g/kg) We know the air is saturated 100% RH. Therefore the mixing ratio and saturated mixing ratio are equal (both 3 g/kg). When the air is brought indoors the Relative humidity outdoors 3 divided by 3 times 100 = 100% Relative humidity indoors 3 divided by 16 times 100 = 19% The moisture content (dew point) remained constant and therefore the relative humidity decreased just because the air temperature increased. Temperature vs. Dew Point 70 66 69 66 68 66 67 66 66 66 dew forms and release of latent heat 65 65 more dew 64 64 more dew 63 63 more dew 62 62 more dew sunrise When the air temperature is the same as the dew point temperature, it is saturated. Temperature vs. Dew (frost) point 33 28 32 28 31 28 30 28 29 28 28 28 frost forms and release of latent heat 27 27 more frost 26 26 more frost sunrise
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Meteorology Notes 4:26 PM4:26 PM Tuesday, October 9, 2007 Temperature vs. Dew Point 70 40 66 40 etc. 40 52 40 sunrise NO DEW Temperature vs. Dew Point 38 34 37
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Elements of Meteorology Notes for Exam 2 - Meteorology...

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