DEPARTMENT OF GEOSCIENCES                               Name____________________    

San Francisco State University                                         April 8, 2009                                                                                                                                                                                      Spring 2009

 

Synoptic Metr 201 Quiz #1

100 pts.

(Test will be collected at 10:45 AM)

 

A.  Definitions.  (5 points each for a total of 25 points in this section).

 

(a) Lifting Condensation Level --

 

 

 

 

 

 

(b)         Level of Free Convection --

 

 

 

 

 

(c)         The study of the development of and evolution of atmospheric motions and circulation systems as solutions of the fundamental equations of hydrodynamics or other systems of equations appropriate to special situations is the definition of __________________________________________

 

(d)         A contour of constant pressure is known as an _________________________________________

 

 

(f)  Synoptic Meteorology –

 

 

 

 

 

 

 

 

B.      Units. (3 pts each for a total of 12 pts)

         Provide the units (metric) used conventionally for the following

        

         V                                           ___________________________

 

         u                                           ___________________________

 

acceleration due to gravity                 ___________________________

 

         w                                          ___________________________

 

 

 

 

C. Sounding (4 pts each for a total of 28 points in this section).

 

Examine the sounding given below.  Note the locations given at A, B, C, D, E and F. Two copies of are provided.  One of the copies has only the standard parcel ascent curve for this case.  The other copy has colored areas (red and blue) added.

Sounding with No CAPE areas indicated
 


Sounding with No CAPE areas indicated

 

1.  This sounding is (choose the correct answer by circling your choice)

 

(a)  Absolutely stable

(b)  Absolutely unstable

(c)  Conditionally unstable

(d)  None of the above

 

2.  The line (solid red) indicated by the letter A is the

 

(a)  Parcel Ascent Curve

(b)  Dew Point Temperature Lapse Rate

(c)  Environmental Lapse Rate

(d)  Condensation Lapse Rate

(e)  Dry Adiabatic Lapse Rate

 

3.  The line (dashed red) indicated by the letter B is the

 

(a)  Parcel Ascent Curve

(b)  Dew Point Temperature Lapse Rate

(c)  Environmental Lapse Rate

(d)  Condensation Lapse Rate

(e)  Dry Adiabatic Lapse Rate

 

4.  The level indicated by the letter C is the

 

(a)  Equilibrium Level

(b)  Lifting Condensation Level

(c)  Level of Free Convection

(d)  Equilibrium Level

(e)  Convective Temperature

 

5.  The level indicated by the letter D is the

 

(a)  Equilibrium Level

(b)  Lifting Condensation Level

(c)  Level of Free Convection

(d)  Equilibrium Level

(e)  Convective Temperature

 

6.  The area colored blue indicated by the letter E is

 

(a)  the layer in which the lofted parcel is warmer than the surrounding air at the same elevation

(b) the layer in which the lofted parcel is colder than the surrounding air at the same elevation

(c)  proportional to the Convective Available Potential Energy (CAPE)

(d)  the layer through which the air parcel will be freely buoyant (will loft without any forcing)

(e) Choices (a), (c) and (d) are correct.

 

7.  The area colored red indicated by the letter F is

 

(a)  the layer in which the lofted parcel is warmer than the surrounding air at the same elevation

(b) the layer in which the lofted parcel is colder than the surrounding air at the same elevation

(c)  proportional to the Convective Available Potential Energy (CAPE)

(d)  the layer through which the air parcel will be freely buoyant (will loft without any forcing)

(e) Choices (a), (c) and (d) are correct.

 

 

 

 

 

 

 

 

D.  Short Answer.   (Answer below or on back in complete sentences, with subject, verb and object in each sentence, please)  (17.5 pts each for a total of 35 points in this section)

 

1.     The philosophical underpinning of sounding analysis is something called “parcel theory.”  In a few sentences, briefly describe what is meant by “parcel theory.”










 

 

 

 

 

 

 

 



2.     Thunderstorms can be severe or non-severe.  What distinguishes severe thunderstorms from ordinary non-severe thunderstorms?