Review For Next Class Study Bring a 2 pencil Extratropical Cyclones Where are favored locations for extratropical cyclone formation in the contiguous US Climatically Favored Regions ID: 1021103
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1. ReviewCurrent WeatherExtratropical CyclonesReviewFor Next Class: Study!! Bring a #2 pencil.
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5. Extratropical CyclonesWhere are favored locations for extratropical cyclone formation in the contiguous U.S.?
6. Climatically Favored Regions of CyclogenesisExtratropical cyclones originate and require Weak atmospheric stability, favoring ascending motion of airA nearby source of warm, humid air, which favors condensation of water vapor at low levels that releases latent heat and increases buoyancy Strong horizontal temperature gradients in the lower troposphere that give rise to frontsThe jet stream oriented above so diverging air aloft evacuates the rising air that has converged near the central low pressure
7. Climatology of Cyclone PathsAlberta Clipper - the principal tracks of cyclones that develop to the lee of the Canadian Rockies in Alberta and travel rapidly east across southern Canada or the northern tier statesNor’easter - the principal tracks of cyclones that track toward the northeast along the East Coast
8. Big IdeasPressure gradient force, Coriolis force, friction and gravity interact in initiating and affecting atmospheric circulationHorizontal and vertical air motions in anticyclones and cyclones determine weatherThe principal features of atmospheric circulation are the ITCZ, trade winds, subtropical highs, the westerlies, polar front, subpolar lows, polar easterlies and polar highs Aloft, in the middle and upper troposphere, winds blow Counter to the surface trade winds in tropical latitudes In a west-to-east wave pattern at middle and high latitudes
9. Big IdeasThrough the course of a year, components of the planetary-scale circulation shift north and south with the Sun, influencing regional climatesSynoptic scale wind and cyclone climatology emphasizes the link between the westerly winds aloft and the weather and climate of middle latitudesWesterlies produce horizontal divergence aloft for the development of cyclones, steer storms and influence air mass trajectories
10. Key TermsForcePressurePressure gradientPressure gradient forceCoriolis EffectCoriolis forceGeostrophic windGradient windWind vaneCup anemometerScatterometerSynoptic scaleMesoscaleMicroscaleSubtropical highHorse latitudesWesterliesTrade windsIntertropical convergence zone (ITCZ)Circumpoler vortexFrontFrictionMolecular viscosityEddy viscosityEddiesBoundary layerGravityPolar frontHadley cellTrade wind inversionRossby wavesMeridional flowZonal flowBlocking patternArctic AmplificationNorwegian Cyclone ModelCyclogenesisJet streamPolar front jet streamAlberta ClipperNor’easter