PPT-Air masses and fronts

1 An air mass is a widespread section of the troposphere with uniform temperature and humidity moisture 2 The source region is the geographic location the air mass developed over If air settles over one location for a long time it develops the characteristic temperature and moisture of the area. Front: a boundary between 2 air masses. Warm air and cold air do not mix well.. Changes in weather occur along fronts.. 4 Types of fronts:. Cold Front. Warm front. Stationary front. Occluded front. 1. Cold Front. 8. th. Grade. Definition. Weather front – The area where two air masses meet and do not mix.. Front and Weather. Different types of fronts produce different patterns of weather. . There are four types of weather fronts:. 10/2/12. Weather changes as air masses move.. ____________- large volume of air where temperature and humidity are the _________ at different altitudes.. Air masses can cover thousands of square miles. the. Weather. Sun = Energy driving weather. Equator = warm; Poles = cold .  . why. ?. Daytime: air over land warmer than over water; reverse at night. .  . why. ?. Convection currents . An . air mass. is a . large . pool of air having similar temperature and moisture . characteristics. . An air mass occupies thousands of square miles of the Earth's surface. Air masses are . created . An . air mass. is a . huge body of air. that has similar characteristics as the area they were formed.. Air Masses . classified by…. MOISTURE. TEMPERATURE. COLD. HOT. WET. DRY. Air Masses are named based on where they FORMED…. Warm Air Front. Warm Air Front. Warm air replaces cold air. w. arm air mass=higher temperature=lesser density. Rainfall increases as the . front approaches. Characteristics. Weather phenomenon. Prior to the Passing of the Front. What’s the difference?. Air Mass. An . air mass . is a large volume of air with the same temperature and moisture content.. As an . air mass . forms, it takes on the characteristics of the area over which it develops.. A large body of air having nearly uniform conditions of temperature and humidity at any given altitude.. Warm air. forms over . tropical. regions near the equator. . . T- Tropical. . Cold air. . © U.S. Coast Guard . Auxiliary Association. No attempts to add, modify or delete information contained within this document shall be made. If errors are discovered, please contact the U.S. Coast Guard Auxiliary’s National Training . is the study of atmospheric phenomena.. The Causes of Weather. Weather and Climate. Weather. is the current state of the atmosphere, including short-term variations that affect our lives.. The Causes of Weather. The Causes of Weather. Objectives:. Compare and contrast weather and climate. Analyze how imbalances in the heating of the Earth’s surface create weather. Describe how and where air masses form. Meteorology is the study of atmospheric phenomena, from the ancient Greek meteor “high in the air”. . ATMO 1300. Summer II . 2017. Air Mass. A large body of air in which there are similar horizontal temperature and moisture properties.. . Properties largely acquired from underlying surface. Air masses can cover thousands of miles. air masses.. . An . Air Mass. is an immense body of air, some 1600+ km (~1000mi) across and 1-3 km (~.6 to 1.9mi) thick, with relatively homogeneous physical properties (density, T. . and moisture) at a given altitude..