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Flashcards in Met - Fog Deck (10)
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1
Q

Describe how advection fog forms …..

A

When warm humid air moves in over a cold surface the lower layers can be cooled sufficently to for fog

2
Q

State 3 main facts about advection fog …..

A
  1. Can form at any time of day or night
  2. May linger for days at a time
  3. Rare in Australia
3
Q

What may radiation fog do before it dissipates …..

A

it may thicken

4
Q

State the 3 conditions for the formation of radiation fog …..

A
  1. Clear night skies
  2. Light winds
  3. Humid air
5
Q

Name the 2 types of fog …..

A
  1. Radiation
  2. Advection
6
Q

As fog lifts it forms …..

A

Sc and or St

7
Q

Why is slant visibility a problem in fog …..

A

fog is rarely deeper than 600ft, so when looking from above things seem fine but on finals the horizontal or slant visibility is reduced which can be dangerous

8
Q

To be classified as fog visibility must be ….. otherwise it is categorised as …..

A

less than 1000m, mist

9
Q

What are the 2 ways that radiation fog dissipates …..

A
  1. An increase in wind
  2. An increase in solar heating
10
Q

What 2 things can cause fog to linger longer …..

A
  1. Middle level clouds
  2. Calm conditions