atmo324-07-asmt4

# atmo324-07-asmt4 - T s = 0 o C q s = 3.75 g kg-1 RH=50(b T...

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ATMO 324: Problem Set 4 ( due Nov. 5 ) Chapters 5 & 6: Hydrologic Cycle and Atmospheric General Circulation 1. (Hartmann 5.1) The approximate volume of water retained in soil moisture and groundwater is given in Table 5.1. Use the data in Fig. 5.1 to calculate the time it would take for precipitation over land to deliver an amount of water equal to the soil water and groundwater. How long would it take to replace the groundwater and soil moisture if only 10 % of the runoff could be redirected to replenishing the groundwater? 2. (Hartmann 5.2, but omitting the last question in the problem.) Use the bulk aerodynamic formula (4.32) to calculate the evaporation rate from the ocean, assuming that C DE = 10 -3 , U =5 m s -1 , and that the reference-level air temperature is always 2 o C less than the sea surface temperature. Calculate the evaporation rate for (a)
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Unformatted text preview: T s = 0 o C, q s * = 3.75 g kg-1 , RH=50%; (b) T s = 0 o C, q s * = 3.75 g kg-1 , RH=100%; (a) T s = 30 o C, q s * = 27 g kg-1 , RH=50%; (d) T s = 30 o C, q s * = 27 g kg-1 , RH=100%. Assume a fixed density of 1.2 kg m-3 . 3. (Hartmann 6.4) Calculate the zonal velocity of an air parcel at the equator, if it has conserved angular momentum while moving to the equator from 20 o S, where it was initially at rest relative to the surface. 4. (Hartmann 6.5) The tropical easterlies and midlatitude westerlies occupy about the same surface area of Earth. Would you expect the surface westerly winds to be stronger, weaker, or about the same as the surface easterlies? Explain your answer with equations....
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