Download ATM205 Introduction to Atmospheric Sciences Fall 2014 Homework

ATM205 Introduction to Atmospheric Sciences Fall 2014
Homework No. 8 Due 10/30/14
Name:__________________ ID:__________________
I.
Multiple Choice Questions (12 points, 1 point for each question)
1.
Particles that serve as surfaces on which water vapor may condense are called:
a. hydrophobic nuclei
b. nacreous nuclei
c. scud
d. condensation nuclei
Which cloud is least likely to produce precipitation that reaches the ground?
a. cirrocumulus
b. nimbostratus
c. stratus
d. cumulonimbus
A dim, “watery” sun visible through a gray sheet-like cloud layer is often a good
indication of ____ clouds.
a. stratocumulus
b. nimbostratus
c. cumulonimbus d. cirrostratus
e. altostratus
On an infrared satellite picture, low warm clouds appear
and high cold
clouds appear .
a. white, gray b. white, white c. gray, white
d. gray, gray
The origin of cP and cA air masses that enter the United States is
a. Northern Europe b. The northern Atlantic Ocean
c. Northern Canada and Alaska
d. Antarctica
What type of air mass would be responsible for hot, muggy summer weather in
the eastern half of the United States?
a. mT
b. mP c. cT d. cP
e. cA
When two air masses collide at a front, one air mass rises because it has lower
a. pressure b. density c. temperature d. humidity
Before the passage of a cold front the pressure normally
, and after the
passage of a cold front the pressure normally
.
a. drops, drops
b. drops, rises
c. rises, rises
d. rises, drops
Which below is not correct concerning an occluded front?
a. it is often associated with a broad band of precipitation
b. it marks a zone of shifting wind
c. it is colored purple on a surface weather map
d. at the surface it is always followed by colder air
2.
3.
4.
5.
6.
7.
8.
9.
10.
A good source region for an air mass would be:
a. mountains with deep valleys and strong surface winds
b. generally flat areas of uniform composition with light surface winds
c. hilly with deep valleys and light winds
d. generally flat area of uniform composition with strong surface winds
11.
One would expect a cP air mass to be:
a. cold and dry
b. cold and moist
c. warm and dry
d. warm and moist
12.
The above diagram represents a side view of
a. a cold front.
b. a warm front.
c. an occluded front.
d. a stationary front.
II.
Short essay questions (total 12 points)
Remember to give the answers in essay form and spell out the words (e.g. cloud
types) in full. Please type the answers and print them out.
1. (4 pts.) List the 4 major cloud groups and give one example for each group.
2. (4 pts.) List the five basic types of air masses. Give an example of where each type could
originate and describe how each air mass could affect local weather conditions if it
moved into your region.
3. (4 pts.) Draw side views of a typical warm front. Clearly indicate the relative
temperatures (i.e. warm/cold) of the separate air masses and show their directions
of motion with arrows. What types of clouds would you expect to find and
where? Where would you expect precipitation to occur?
.
Extra credit: You can hand in Questions for Review at the end of Ahrens Chapter 5
(Condensation), or 11 (Air masses and fronts). You should write down both chapter and
question number. Type the questions and answers and print them out.