PPT-Fronts

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. Its both chilling and absorbing the right mix in a thriller New York Daily News Robert Mallon has lived for ten quiet years in affluent Santa Barbara Was in dead air on your this You get behind a single player you need A fire even a propane tank in rarefactions and contact discontinuities Contact discontinuities are surfaces that separate zones of different density and tem perature By definition such a surface is in pressure equilibrium and no gas flows across it When as often happens the tang Air streams tend to contain relatively narrow ranges of potential temperature and wet bulb potential temperature w peculiar R isentropic analyses for synoptic scale weather systems tend to show well defined air streams which are identified by nam and fronts. Review of last lecture. Tropical cyclone structure: 3 major components, rotation direction of inflow and outflow, location of maximum wind and rainfall, 3 feedbacks. Tropical cyclone destruction: 4 reasons? Which side has the most intense destruction? . “Whirlwind Theory”. Rotation. Coriolis. Espy. Convergence into Low. PGF. 1841. Loomis. Rotation AND Convergence. 1860. Early Maritime Observations (Winds). http://m.nautil.us/issue/25/water/the-dueling-weathermen-of-the-1800s. 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 . Warm Fronts. : occurs when a warm air mass slides over a cold air mass. Relatively . stable. Moves slower than . a . cold . front. Long transition from cold air to warm air (warm air moves slowly). Temperature gradually rises. 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.. We will go over how to upload your file into canvas together.. Wanted Poster Requirements. You are making two posters.. The name and a picture of the Pressure Systems.. The way they circulate . (clockwise or counterclockwise). . 1. An air mass is a wide-spread 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.. . 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 (. Lisha. M. . Roubert. University of Wisconsin-Madison. Department of Atmospheric & Oceanic Sciences. Fronts: The Boundaries between Air Masses. A front is defined as the transition zone between two air masses of different density. . & . the weather they bring. Have you ever wondered why we get certain kinds of weather…cloudy days with lots of rain…sudden storms, then cooler weather…?. All weather happens because of the 4 types of fronts & how they interact:. 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.