Exam 3

Question 1

Adiabatic Processes

Answer 1

No exchange of heat across the boundary of the parcel, associated with rising air.

Question 2

Diabatic Processes

Answer 2

Assumes an exchange of heat between parcel and environmental air. Parcel sinking

Question 3

DALR

Answer 3

The rate at which the temperature of unsaturated air changes as it ascends or descends in the atmosphere. Usually about 5 deg. F per 1000 ft.

Question 4

ELR

Answer 4

Environmental Lapse Rates

Question 5

When ELR > 5.5 F per 1000ft the atmosphere is

Answer 5

Absolutely Unstable

Question 6

MALR

Answer 6

Moist Adiabatic Lapse Rate ~ 3.3 F per 1000 ft.

Question 7

When ELR > MALR but ELR < DALR the atmosphere is

Answer 7

Conditionally unstable

Question 8

When ELR < MALR the atmosphere is

Answer 8

Absolutely stable

Question 9

Thermodynamic Diagram

Answer 9

Shows temperature and humidity with height

Question 10

Stability is Enhanced by

Answer 10

Radiational cooling of the Earth after sunset
Cooling of air masses from below as they moves over colder surfaces.
Sinking air, or subsidence

Question 11

High Clouds (20,000 ft.)

Answer 11

Cirrus, Cirrocumulus, Cirrostratus

Question 12

Cirrus (Ci)

Answer 12

Wispy johns

Question 13

Cirrocumulus (Cc)

Answer 13

Little cum puffs, indicative of instability in upper air

Question 14

Cirrostratus (Cs)

Answer 14

Super thin wide layer clouds at high levels

Question 15

Middle Clouds (6,000-20,000ft)

Answer 15

Altocumulus, Altostratus

Question 16

Altocumulus (Ac)

Answer 16

Grey and white thumb-puff size with dark bases, indicates middle air instability

Question 17

Altostratus (As)

Answer 17

Very large cloud covering the entire sky, usually makes the sun look like a glowing disk. Form in advance of storms that produce widespread precip

Question 18

Low Clouds (Surface - 6000ft)

Answer 18

Stratus, Stratocumulus, Nimbostratus

Question 19

Stratus

Answer 19

Low clouds 2000 ft up, drizzle

Question 20

Stratocumulus

Answer 20

Low and lumpy, form when cumulus break up

Question 21

Nimbostratus

Answer 21

Big grey lumpy clouds, no thunder, medium precip

Question 22

Cumulus

Answer 22

Big dumpers, indicate rising air motion, instability.

Question 23

Undulatus

Answer 23

Waves, associated with Altocumulus

Question 24

Translucidus

Answer 24

TO shine through, Cirrostratus

Question 25

Mammatus

Answer 25

Cumulonimbus milkers