This document discusses the four main types of fog: radiation fog, which forms at night when the ground cools and humid air condenses; advection fog, which forms over oceans when warm, moist air moves over cooler surfaces; upslope fog, which occurs when moist air is pushed up mountains; and evaporation fog, which forms when cold air moves over warm water and adds vapor to the air. Each type of fog has specific environmental conditions that cause its formation.

1. AMPLIACIÓ 2012/13
MAFALDA
LAURA
ALÍCIA ANNA
GEMMA

2.  Fog is a collection of liquid water droplets or ice
crystals suspended in the air at or near the Earth's
surface.
Fog Cold air
Warm and
humid air
Cold
ground Water

3. There are four different types of fog:
 Radiation fog.
 Advection fog.
 Upslope fog.
 Evaporation fog.

4.  This type of fog forms at night with calm winds. The
humidity will reach 100% and fog will form.

5.  Advection fog forms at sea when warm air associated
with warm current and condensation takes place.
 This type of fog forms on the oceans too, this usually
happens at night.

6.  Upslope fog forms when light winds push moist air up of
a mountain.
 This type of fog occurs in all mountains of North
America.

7.  This type of fog forms when sufficient water vapor is
added to the air. Vapor fog forms when cold air moves
over warm water.