GEOG 111 1st Edition Lecture 25 Outline of Last Lecture I The Circumpolar Vortex Outline of Current Lecture I The Circumpolar Vortex review II Wave Cyclones a Example Current Lecture I The Circumpolar Vortex river of air that meanders around Earth s poles a There is much day to day and week to week variability in the character of the CPV b Ridges and troughs propagate downstream c Jet stream the geographic place in the atmosphere where winds blow the strongest i Occurs where the north south temperature gradient is the strongest ii Warm cold air is present south north of the jet stream iii Most types of extreme weather develop in the vicinity of the jet stream or occur when the jet stream in an unusual position e g farther north or south than normal d Climatology of circumpolar vortex i Winter Early Spring 1 Fastest winds 2 Most expansive i e jet stream closest to Carolina 3 Weather most changeable ii Summer Early Fall 1 Weakest winds 2 Most contracted 3 Jet stream to the North in Canada 4 Pressure gradient much weaker 5 Weather most persistent e Climatology continued i Summer Season example 1 Features cyclone ridges trough that are much weaker 2 Move slower 3 Weather is changing in the North where the features are located II Wave Cyclones a Example March 1993 Superstorm i Several types of extreme weather 1 Blizzard went all the way down to Alabama a Incredibly unusual against climatology These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute 2 Severe thunderstorms tornadoes 3 Storm surge flooding along West coast of Florida 4 Cyclone is pushing warm air to the north and vice versa a Counterclockwise
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