Lecture Quiz 4

1

When the atmosphere is stable:

A. Vertical movement of air parcels in encouraged
B. Vertical movement of air parcels in suppressed
C. All movement of air parcels in suppressed
D. Air at the surface is warmer than the air above it
E. Air at the surface is very cold

Answer:

B. Vertical movement of air parcels in suppressed

2

Which type of conditions would be associated with the worst air quality (high pollution levels) down-wind of a coal-fired power plant?

A. Unstable Conditions
B. Conditionally Unstable Conditions
C. Neutral Conditions
D. Stable Conditions
E. Very Windy Conditions

Answer:

D. Stable Conditions

3

Figure 1 illustrates an example of:

A. Tectonic Uplift
B. Orogenic Events
C. Topography
D. Topology
E. Orographic Lift

Answer:

E. Orographic Lift

# The adiabatic process equation (APE)

setClass(Class="Parcel",representation(T="numeric",Td="numeric",z="numeric",LCL="numeric"))
APE <- function(Parcel,z2){
  DALR = -0.01
  SALR = -0.006
  # Calculate the LCL
  LCL = (Parcel@Td-Parcel@T)/DALR+Parcel@z
  Parcel@LCL = LCL
  # Evaluate the APE and update the parcel temperature
  Parcel@T = Parcel@T + min((LCL-Parcel@z),(z2-Parcel@z))*DALR + max(z2-LCL,0)*SALR
  # Update the parcel's height and dewpoint if necessary
  Parcel@z=z2

  if(Parcel@z>=LCL){
    Parcel@Td = Parcel@T
    Parcel@LCL = Parcel@z}
  return(Parcel)
}

A = new("Parcel",T=3,Td=-1,z=1484,LCL=NaN)
A = APE(A,A@z)
B = APE(A,2133)
C = APE(B,1550)
D = APE(C,832)

4

In Figure 1, Parcel A is on the shore of garibaldi lake, with a surface elevation of 1484 m.a.s.l. with \(T\) = 3 \(^{\circ}\) C \(^{\circ}\) C and \(T_d\) = -1 \(^{\circ}\) C \(^{\circ}\) C. Assuming the DALR = -0.01 K m^-1 and the SALR = -0.006 K m^-1, what is the height of the LCL for parcel A?

A. 1884 m.a.s.l
B. 2133 m.a.s.l
C. 1700 m.a.s.l
D. 1484 m.a.s.l
E. 1884 m.a.s.l

Answer:

1. 1884 m.a.s.l

5

In Figure 1, location B represents the summit of panorama ridge, 649 m above the lake surface. If parcel A is blown up the slope, to location B, what would conditions at location B be like? Assume the DALR = -0.01 K m^-1 and the SALR = -0.006 K m^-1.

A. Rain will be likely location B
B. No precipitation will occur at location B because it is below the LCL
C. Snow will be likely at location B
D. There is not enough information to answer this question
E. No precipitation will occur at location B because it is above the LCL

Answer:

C. Snow will be likely at location B

6

In Figure 1, location C represents Helm Creek Campground, which has an elevation of 1550 m.a.s.l. Assume parcel A is blown up and over location B, then down to location C. What would the air temperature be at location C? Assume the DALR = -0.01 K m^-1 and the SALR = -0.006 K m^-1.

A. Not enough information to answer the question.
B. -2.494 \(^{\circ}\) C
C. 3 \(^{\circ}\) C
D. 3.336 \(^{\circ}\) C
E. 10.516 \(^{\circ}\) C

Answer:

D. 3.336 \(^{\circ}\) C

7

In Figure 1, location C represents Helm Creek Campground, which has an elevation of 1550 m.a.s.l. Assume parcel A is blown up and over location B, then down to location C. What would the dewpoint be at location C? Assume the DALR = -0.01 K m^-1 and the SALR = -0.006 K m^-1.

A. Not enough information to answer the question.
B. -2.494 \(^{\circ}\) C
C. 3 \(^{\circ}\) C
D. 3.336 \(^{\circ}\) C
E. 10.516 \(^{\circ}\) C

Answer:

B. -2.494 \(^{\circ}\) C

8

In the atmosphere ____ is more efficient than ____ at transporting heat energy.

A. Diffusion,Convection
B. Convection,Diffusion
C. Advection,Convection
D. Advection,Diffusion
E. A, B, & C

Answer:

1. Convection,Diffusion

9

Mechanical convection cane be generated by:

A. Two layers of air passing one another with different velocities.
B. Skin friction as an air parcel moves over a surface.
C. Large obstructions blocking flow
D. B & C
E. A, B, & C

Answer:

E. A, B, & C

10

Thermal convection:

A. Is caused by surface heating
B. Is more likely to occur during the day
C. Requires a consistent supply of kinetic energy
D. A & B
E. A B & C

Answer:

D. A & B

11

Would you like one free extra credit point? There are multiple correct answers, but you only need to select one.

A. Yes!
B. Absolutely!
C. Of Course!
D. Why Not?
E. If it’s free, I’ll take it :)

Answer:

A-E all get you a free point