PPT-Chapter 9 Air Masses and Fronts

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. Dr. . Hooda. . What is an air mass?. 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. . 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. An . air mass. is a . huge body of air. that has similar characteristics as the area they were formed.. Air Masses are named based on where they FORMED…. . = TROPICAL. . . = . POLAR. . = . 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 . 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…. Forecasting Weather. Now that Meteorologists understand the factors that affect weather they must put all of this together to create . weather maps. and to determine . weather patterns. .. Together weather maps and weather patterns are very helpful in . 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. Connecting the Weather. Air Masses. Fronts. Jet Stream. Quiz. Midweek Seminars. Meteorology – Jet Streams Fronts and Air Masses. Air Masses. A mass . of air takes on Temperature and Moisture from where the . 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. . Lecture . 15: Air Masses & Fronts. MET 102 Pacific Climates and Cultures. Discussion Questions – Clark 2011 . What are the different general types of ai. r masses?. Maritime Tropical (. mT. ). Maritime Polar (. . Movements of Air Masses and Fronts are vital to our . understanding. and . prediction. of Weather Systems. . Weather Forecasting. requires that we understand. :. Cyclones (. L. =Lows) and Anticyclones (. Fronts occur in the boundary zone between polar and tropical air masses.. World War I Aerial Photograph. trenches. trenches. “No man’s land”. Ben Franklin’s Storm. (Nov. 2, 1743). Philadelphia. Air masses. A body of air with similar characteristics throughout. Humidity. . and . temperature. are the two main characteristics used to classify air masses.. The “first name” of an air mass describes the humidity of the air mass.. Weather Maps. Storms. Weather Maps. Weather Stations. Show the following data. in a concise way:. . - cloud cover. . - wind direction. . - wind speed. . - temperature. . - precipitation. .