GEO 211 1st Edition Lecture 24 Outline of Last Lecture I. Chapter 10- Wind: Global Systems continuedA. Wind circulation of each hemisphere is divided into 3 distinct cells1. Hadley cell (0°-30°)2. Ferrell cell (30°-60°)3. Polar cell (60°-90°)- Ridge- TroughOutline of Current Lecture II. Jet streamA. Types of jet streamsB. Subtropical jet streamC. Polar front jet streamD. Tropical easterly jet streamsIII. Chapter 9- small scale winds (and local systems)- Macroscale windso Planetary scaleo Synoptic scale- Mesoscale winds- Microscale windsE. Microscale winds F. Mesoscale winds G. Macroscale winds H. Synoptic scale (weather, map scale)Current LectureII. Jet stream- Narrower region (tube like) of relatively strong winds alof- Usually located in upper troposphere (tropopause)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.- The term “jet stream” is considered analogous to “jets of water”- Highest speeds are at the center core- called jet streak/jet maximum (center of jet stream)A. Types of jet streams- Subtropical jet stream- Polar front jet stream - Tropical easterly jet streamB. Subtropical jet stream- Located at tropopause nearly 43,000 feet above the subtropical high- Flow west to east in wavelike patterns- Meander between 20° and 50° latitudeC. Polar front jet stream- Located at the tropopause nearly 33,000 feet above the subpolar low- Meanders between 30° and 70° of latitude- Strongest in winter when temperatures are gradient are steep D. Tropical easterly jet streams- Develop above 15° N latitude- Northern Hemisphere ONLY- Stretches from Southeast Asia, India, and East Africa- NOT around the globe- Develops in summer, disappears in winter- Flows East to WestIII. Chapter 9- small scale winds (and local systems)- Macroscale windso Planetary scaleo Synoptic scale- Mesoscale winds- Microscale windsE. Microscale winds- Smallest scale of motion (short-lived, lasting for a few minutes)- Ex: dust devils, simple gusts F. Mesoscale winds- Less than 100km (62 miles)- Ex: land and sea breezes, thunderstorms, tornados, mountains, valley winds G. Macroscale winds- Planetary (global) scale- Largest wind patterns- Ex: westerlies, trade winds H. Synoptic scale (weather, map scale)- Dominate a large region- Including cyclones,
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