Transcript Conditions For Fog Formation:

Conditions For Fog Formation:
• Given a sufficient number of condensation
nuclei, the ideal condition for fog formation are:
#1
A high relative humidity.
#2
A small temperature dew-point spread.
#3
Some cooling process to initiate condensation.
Level Four 413.03
OHP # 1
Types of Fog
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Level Four 413.03
Radiation Fog
Advection Fog
Upslope Fog
Steam Fog
Precipitation-Induced Fog
Ice Fog
OHP # 2
Match the type of fog with the description of its formation by placing
the correct letter in the appropriate blank.
Name:
A. Smog
B. Ice Fog
C. Upslope Fog
This type of fog is caused by the addition
of moisture to the air through the
evaporation of rain or drizzle.
This type of fog is caused by the cooling
of air due to expansion as it moves up a
slope.
D. Haze Fog
This type of fog is caused by the drifting
of warm damp air over a colder land or
sea surface.
E. Precipitation-Induced Fog
This type of fog forms when cold air
passes over a warm water surface.
F. Advection Fog
This type of fog is formed on clear nights
with light winds. The ground cools, losing
heat through radiation. The air in direct
contact with the Earth’s surface is cooled.
If the air is moist and the temperature is
lowered below the dew-point, fog will
form.
G. Steam Fog
H. Warf Fog
I. Radiation Fog
Level Four 413.03
This type of fog is caused by the addition
of water vapor to the air through fuel
combustion.
OHP # 3