chapters 23 and 24 review by sarah snoberger. chapter 23 - atmospheric moisture
TRANSCRIPT
Humidity -The amount of water vapor in the air
Determined by the temperature or the air
the temperature , the the rate of evaporation
Absolute Humidity : absolute humidity =
Relative Humidity: a common way to express the amount of water vapor in the atmosphere
Psychometer- tool used to measure relative humidity
Mass of air vapor ( grams)
Volume of the air (cubic meters)
Cloud Formation- collections of small water droplets or ice
crystals that fall slowly through the air: water vapor condensed and forms into clouds
Mixing: two bodies of moist air masses mix together and causes the temperature to change
Lifting: the air rises and causes clouds to form due to the temperature drop
Advective Cooling: the temperature of the air mass decreases as the air moves over a cold surface
Types of Precipitation Rain: liquid precipitation
Drizzle: the raindrops are smaller than 0.5 mm
Snow: most common type of solid precipitation
Sleet: when rain falls through cool air mass and comes out as clear ice pellets
Hail: solid precipitation in the form of ice chunks
Air Masses - a large body or air throughout which
temperature and moisture content are similar
Air Masses
Source Region Type of Air Symbol
Continental dry c
Maritime Moist m
Tropical Warm T
Polar Cold p
Types of Fronts Cold Front: the front edge of a moving mass of
cold air that pushes beneath a warmer air mass like a wedge
Warm Fronts: the front edge of advancing warm air mass that replaces colder air with warmer air
Stationary Front: a front of air masses that moves either very slowly or not at all
Occluded Front: forms when a cold air mass overtakes a warm air mass and lifts the warm air mass off the ground and over another air mass
Cyclones Midlatitude Cyclone: an area of low pressure
that is characterized by rotating wind that moves toward the rising air of the central low-pressure region
Anticyclone: the air sinks and flows outward from the center of high pressure