PPT-Cold Front

Warm Front. 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. 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 . Lab. Fronts!. Fronts!. What are fronts?. A narrow transition zone, or boundary, between differing synoptic scale air masses whose primary discontinuity is density. Fronts highlight . baroclinic. zones, where temperature advection and atmospheric energy is at work. Fronts. Lesson 8: Weeks . 13-14. Courtesy: Lyndon State College. What is a . front. ?. Early meteorological theory thought that “fronts” led to development of low pressure systems (cyclones). However, in the 1940s, “. 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.. 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 (. H is for . “HIGH PRESSURE”. H is for . HEAVY. BLUE = . COOLER. Cool air . contracts. Cool air sinks . because COOL air is HEAVIER. Sunny but slightly cooler weather. Heavy shoves clouds out of the way. Written by;. Brian P. Pettegrew, Patrick S. Market, Raymond A. Wolf, Ronald L. Holle, and Nicholas W.S. Demetriades. Presentation by;. Marcello Andiloro. Introduction and Background. On the evening of 11 Feb. 2003 a line a severe thunderstorms moved through southeast Iowa and northwest and central Illinois with winds in excess of 50 . 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. 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. 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.. . 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..