Home > Flashcards > Meteorology > Ch. 10: Mid-latitude Cyclones

Details Title: Ch. 10: Mid-latitude Cyclones Description: Mid-latitude Cyclones Total Flash Cards: 28 Created: 11/07/2007 10:52:02	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term Who is Vilhem Berjernes Definition Developed the polar front theory (Norwegian Cyclone Model) Term Define Cyclgenesis Definition The formation of cyclones Term Cyclones begin along what type of front? Definition Stationary polar front Term In cyclogenesis,warm air attempts to push ____ and cold air attemps to push ___ Definition North; South Term In cyclogenesis, ____ pressure forms developing a ripple in the ____ front Definition Low, stationary Term In mature cyclones, deep low pressure center forms from ______ Definition surface convergence Term After a low pressure center forms, strong ____ and _____ fronts develop Definition cold, warm Term In a mature cyclone, strong storms exists along the _____ front Definition cold Term What happens during occlusion of the mature cyclone? Definition Faster moving cold front catches the slower moving warm front and cold wair forces the warmer air up Term When is the storm at its max strenth? Definition The point of occlusion Term After occlusion the storm _____ Definition weakens Term Define cyclosis Definition When the storm weakens Term In the middle and upper troposheric air flow, voricity is ____ Definition the rotation of air Term Define relative vorticity Definition the spin of air in reltion to Earth's surface. Term Define absolute vorticity Definition The sum of relative vorticity and Earth vorticity (rotation) Term If the absolute voricity is positive, the air spins _____ and if it's negative the air spins ____ Definition counterclockwise, clockwise Term A trough is a ____ rossby wave Definition positive Term A ridge is a ____ rossby wave Definition Negative Term Changes in vorticity triggers changes in ______ Definition Surface pressure Term Troughs develop behind ____ fronts Definition cold Term ______ develop behind warm fronts Definition Ridges Term What does upper level convergence relate to? Definition Surface cyclones Term Air at 500 mb steer the motion of ____ Definition cyclones Term During _____ there is stronger air flow so there are faster moving storms Definition winter Term Winter brings what kind of storms? Definition More frequent and stronger Term What are the different types of air flows that affect Illinois? Definition Alberta Clipper, Colorado Low, East Coast Low Term Upper-air divergence is necessary for ____ Definition cyclogenesis Term ______ strengthens if divergence aloft exceeds surface convergence Definition rossby waves