Fronts & Pressure Systems Air mass 1. Air mass forms as it sits over a large area of land for many days. 2. The air takes on the characteristics of the.

Slides:



Advertisements
Similar presentations
Why Do We Have Weather?.
Advertisements

Why Do We Have Weather?.
Why Do We Have.
Air Masses, Pressure Systems, and Frontal Boundaries
Why Do We Have Weather?. An Introduction Take good notes! There will be a quiz at the end of this presentation.
AIR MASSES AND FRONTS 1. Air masses take on the characteristics of the area where they form. Air mass temperature and moisture are consistent throughout.
By: Sofia Mertz Chapter 6, Lesson 1 and 2. An air mass: is a large body of air with similar properties all through it. The most important properties are.
Air mass - large body of air that has similar temp. and moisture - move by prevailing winds and upper air currents Front - boundary between 2 different.
Develop and use models to explain how relationships between the movement and interactions of air masses, high and low pressure systems, and frontal boundaries.
Notes: Air Masses and Predicting the Weather
Section 17.1 Notes Weather changes as air masses move.
Fronts and Masses UNIT 4, LESSON 3. Warm Up – November 5 Right Now.
AIR MASSES AND FRONTS.
Monday, March 24 th Entry Task For problems 1-3, Decide if the statements are true. If they are write them out as is. If they are false, correct the statement.
AIR MASSES AND FRONTS Chapter 16 Section 2 1. Air masses take on the characteristics of the area where they form. Air mass temperature and moisture are.
* The relative measure of the amount of water vapor in the air * Psychrometer – measures the humidity * Water vapor affects the density of the air. * Cold.
Fronts and air masses By the administrator Copyright of sivani.vedulas.com.
Air Masses & Fronts Chapter 17 Section 1 Pages Chapter 17 Section 1 Pages
Air Masses and Fronts.
Weather.
Journal W-2 1.Explain how clouds form. 2.How do we classify clouds? 3.Compare and contrast freezing rain and sleet. 4.What is dew point? TURN IN JOURNALS!
Air Masses and Fronts Ch. 16, sec 2.
Air Masses and Fronts. What are air masses? Large Bodies of air Form when the air over a large region sits in one place for many days – The air gradually.
FRONTS AND AIR MASSES (also the 6 important cloud types)
Air Masses and Fronts Meteorology. Air Masses Classified by temperature and humidity –Tropical: Warm, form in tropics, low pressure –Polar: cold, form.
Air Masses and Fronts. An air mass is a large volume of air in the troposphere with similar characteristics of temperature, pressure and moisture as the.
Air Masses.
5.2 Weather Patterns Pages Pressure Systems Air pressure is the force of air on the surface. Air Pressure is greatest near Earth’s surface and.
Learning Goals SStudents will: learn what air masses are explain what happens when air masses meet learn how pressure systems affect the weather.
Chapter 3 Visual Vocabulary Term Definition Picture Air Mass Continental Maritime Polar Tropical Front Cold Front Warm Front Stationary Front High Pressure.
Air and the Sun  For the most part, the Sun’s energy never actually reaches the Earth but is lost in space.  The greenhouse effect is when the atmosphere.
Air Masses and Fronts Ch. 16, sec 2. Air Masses  Air Mass: a large body of air where temperature and moisture content are similar throughout.  Different.
Air Masses And Fronts The Air Outside Today, Was Somewhere Else Yesterday.
What happens when air masses meet?. What is an air mass? Large volume of air with uniform temperature and humidity readings Gets its characteristics from.
Warm up  Answer these questions in your notebook: 1. What is the difference between humidity and relative humidity? 2. What are clouds made of? 3. List.
What type of weather will a LOW pressure system bring? As a low pressure system approaches the pressure will drop due to rising air. As the air rises.
Chapter 3.  3.1  Air Mass – large volume of air in which temperature and humidity are nearly the same in different locations at the same altitude 
Monday, April 4 th Entry Task- on ISN 71 For problems 1-3, Decide if the statements are true. If they are write them out as is. If they are false, correct.
Section 17.1 Start Air Masses Are Bodies of Air
Air masses Large volume of air in which temperature and humidity are the same in different areas but not at the same altitude Takes on the same characteristics.
Weather Changes as Air Masses Move
Weather Fronts and Storms
AIR MASSES AND FRONTS.
Air Masses 10/2/12.
Weather Changes As Air Masses Move
AIR MASSES AND FRONTS Chapter 16 Section 2.
Chapter 3 Visual Vocabulary
Do Now Take out your Atmosphere packets and continue working on the Layers of the Atmosphere activity. Read the directions carefully and answer all of.
Local Winds.
Notes on Fronts.
AIR MASSES AND FRONTS Chapter 16 Section 2.
Air Masses.
Notes on Fronts.
Fronts.
AIR MASSES AND FRONTS Chapter 16 Section 2.
Air Masses and Fronts.
AIR MASSES AND FRONTS.
AIR MASSES Chapter 16 Section 2.
Air Masses and Weather.
3.1 Weather Changes as air masses moves.
Air masses form over large land or water masses. Air Mass
Air Masses and Weather.
AIR MASSES AND FRONTS.
Notes on Fronts.
Air Masses and Weather.
AIR MASSES AND FRONTS Chapter 3 Section 1.
Fronts and Air Masses By Brian Fontaine.
AIR MASSES AND FRONTS Chapter 16 Section 2.
Presentation transcript:

Fronts & Pressure Systems

Air mass 1. Air mass forms as it sits over a large area of land for many days. 2. The air takes on the characteristics of the land or water below it.

Characteristics of an Air Mass Air masses are put into categories consisting of two words. The first word describes how much moisture, and the last word describes temp. – Continental: forms over land, air becomes dry – Maritime: forms over water, air becomes moist – Tropical: forms near equator, air becomes warm – Polar: form far from equator, air becomes cool

Examples of air mass Where Earth’s surface is cold, the air becomes cold. (polar) Where Earth’s surface is warm, the air becomes warm. (tropical) Where Earth’s surface is wet, the air becomes moist. (maritime) *AS AIR MOVES, IT BRINGS ALONG THE TEMP. AND MOISTURE TO NEW LOCATIONS*

What is my name? This type of air mass forms over land and near the equator. This type of air mass forms over water and far away from the equator. This type of air mass forms over land and far from the equator. This type of air mass forms over water and near the equator.

FRONTS When two air masses meet, weather starts to change! A front is the boundary (space) in between two air masses Many things can happen when two air masses meet, such as clouds forming, or stormy weather. Afterward, you experience the temp. and humidity of the air mass that has moved in.

Types of fronts Cold Front: cold air mass pushes a warm air mass causing the warm air to rise. – As warm air rises it condenses forming tall clouds!

Types of fronts cont… Warm front: Forms when a warm air mass pushes a cold air mass. Warm air slowly rises over the cold air and the moisture from the warm air condenses into flat clouds. Brings many hours of rain or snow.

Stationary front: occurs when two air masses push against each other without moving. Can become either a warm or cold front depending on which air mass moves first.

Pressure systems High pressure system- air sinks and spreads out. The spreading air moves slowly clockwise. Low pressure system- air circles into a low pressure center and moves upward. The motion is counterclockwise and can be very quick.

Pressure system cont.. High pressure system: clear skies and calm air because as air sinks to lower altitudes it warms up a bit. Water droplets evaporate so clouds disappear. Low pressure system: Air moves up lowering the pressure. The rising air produces stormy weather. This usually happens in between a warm air mass and a cold air mass.

WEATHER MAP