7.5. CONVECTIVE AVAILABLE POTENTIAL ENERGY (CAPE) 237 Problems. 1. Refer to the sounding in Fig. 7.22. a. Estimate the mixing ratio at the surface. b. Estimate the saturation mixing ratio at the surface. What is the relative humidity at the surface?
Skew T-Log p
sat mixing ratio
1. Given T=18o, w=4g/kg at 1000hPa What is TD, RH?
4 10 12 g/kg
a)We estimate that ws=13g/kg b) r=4/13 c) TD =1o
2. Where is the LCL for this case?
To get t
MOR ABOuT DEM. GASIS @.
ex 2: (dc at ogcotdm/s -. Qsmoaus/s
u, an; w'k wan/S : ~ 1-.
PfOMBHy D0531, Fun 0(a): fuu=|
X, l xl
u: mulch -
VVlkQ 'u =
31 Take; on ' r. __ _
Vducs each Vanna 0; - I ( n) 0,031
Vt! ",qhh " e
um-fvm 17H m
What is a Reversible Transition? What are Intensive & Extensive parameters? System Boundaries? What is pressure? What are Ideal Gases? What is the Mean Free Path? What are different Forms of the Ideal Gas Law?
Questions for Today
What is the Atmosphere Made of? What units do we use here? What is a Thermodynamic System? What are the System and Surroundings? What is a Reservoir? What are Isotherms and Adiabats?
EXAM I, ATMO 335, Feb 11, 2008. OPEN BOOK
1. A parcel of dry air has mass 2.8 kg, temperature 245 K. The parcel rests in the atmosphere at a height corresponding to a pressure of 500 hPa a) What is the volume of this parcel? V = MRT = 3.94 m3 p
1. 26,400 ft for H=8 km 2. 0.0041 3. 0.819 hPa (using H=8 km, 1 mile =1.6km) 4a) 40,212 km 4b) 111.7 km deg-1 4c) 96.7 km deg-1 5. 50,000 km2 8. 11.175 km s-1 9. 2 2gh
1. 1.276, 1.231, 1.189 kg m-3 2. 0.795 kg m-3 3.
EXAM II, ATMO 335, March 24, 2008. OPEN BOOK
1. A 1 kg parcel of dry air is initially at a temperature of 283 K and pressure 1000 hPa. It is transformed (quasi-statically and reversibly) in two steps. i) It is lifted adiabatically to a pressure