Lesson 303 Types Of Evolution Of Fog Flashcards Preview

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Flashcards in Lesson 303 Types Of Evolution Of Fog Deck (11):
1

List the three factors that control the evolution of fog.
CAM

Cooling of the air
Addition of water vapour
Mixing

2

List the six types of fog
RAUPSI

Radiation
Advection
Upslope
Pre-frontal
Steam
Ice fog

3

What are the favoured conditions for the formation of radiation fog? CLHC

Clear night
Light wind speed (3-5 KT)
High relative humidity
Condensation nuclei

4

What are the favoured conditions for the formation of advection fog? MMHC

Moist air over a cold surface
Moderate wind speed (13-17 KT)
High relative humidity
Condensation nuclei

5

What are the favoured conditions for the formation of upslope fog?
MACH

Air forced up a slope (orographic lift)
Moderate wind speed (13-17 KT)
High relative humidity
Condensation nuclei

6

What are the requirements for the formation of pre-frontal (warm rain) fog?
WFHC

Warm air over cold air
Frontal precipitation
High relative humidity
Condensation nuclei

7

What are the conditions favourable for the formation of steam fog and Arctic sea smoke?
CHC

Cold air above warmer water
High relative humidity
Condensation nuclei

8

Ice fog is a __________ phenomenon which occurs at very cold temperatures. It is formed of ice crystals and is caused by the addition of water vapour to the air through _________________.

Man-made
Fuel combustion

9

List the two factors that control the dissipation of fog.
HD

Heating of the air
Decrease of water vapour

10

The dissipation of fog by heating can by the following:
SAAT

Solar radiation
Advection over a warm surface
Adiabatic heating
Turbulent mixing

11

The dissipation of fog by decreasing water vapour can be carried out by:
TC

Turbulent mixing with dryer air above
Condensation of water (dew) or sublimation (hoar frost).