Chapter 11: Adiabatics, Stability and Cloud Formation (PP ch 8/13) Flashcards Preview

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Flashcards in Chapter 11: Adiabatics, Stability and Cloud Formation (PP ch 8/13) Deck (8)
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1
Q

ELR, DALR, SALR

why is SALR smaller? How does it increase?

A

ELR - Environment Lapse Rate
1.98 / 1000 ft or .65 / 100 m

DALR - Dry Adiabatic Lapse Rate
3 / 1000 ft or 1 / 100 m

SALR - Saturated Adiabatic Lapse Rate
1.8 / 1000 ft or .6 / 100 m
smaller lapse rate because of condensation. Increases exponentially.

2
Q

Neutral Stability

A
ELR = DALR - Clear day
ELR = SALR - Cloudy
3
Q

Absolute Instability

Cloud, Precipitation, Turbulence, Visibility, Pressure System

A

ELR > DALR ; ELR > SALR
dry / saturated air become warmer and rise

Clouds: cumuliform
Precipitation: SHRA / SHRN
Turbulence: moderate to severe
Visibility: good outside of SH
Pressure system: Low
4
Q

Absolute Stability

Cloud, Precipitation, Turbulence, Visibility, Pressure System

A

ELR < DALR ; ELR < SALR
dry / saturated air becomes colder and fall

Clouds: stratiform
Precipitation: DZ, SG
Turbulence: light to moderate
Visibility: poor
Pressure System: High
5
Q

Conditional Instability

A

ELR < DALR ; ELR > SALR

dry air falls, saturated air rises

6
Q

Tephigram

Radiosond

A

Tephigram - diagram to determine stability of air

Radiosond - attached to weather ballon
Measures T, hum, P
if GPS attached, Vwind, wind direction

7
Q

Cloud Formation Mechanisms (7)

A
Surface Heating
Cold Front
Warm Front
Orographic Stable
Orographic Unstable
Convergence
Turbulence
8
Q

Cloud Dissipation

A

Adiabatic warming