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ECU - AS 1300 - Class Notes - Week 8

Created by: Jacob Notetaker Elite Notetaker

ECU - AS 1300 - Class Notes - Week 8

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background image ● Pressure ​ ​Differences​ ​lead​ ​to​ ​motion  ○ Thermal ​ ​Low​ ​=​ ​surface​ ​heating  ○ Thermal ​ ​high​ ​=​ ​sinking​ ​or​ ​subsidence  ● Orography ​ ​(Mountains​ ​VS.​ ​Valleys)  ● Humidity ​ ​-​ ​water​ ​vapor​ ​exerts​ ​less​ ​pressure​ ​than​ ​dry​ ​air   ○ Density  goes down pressure goes down  ● Pressure ​ ​Gradient​ ​Force  ○ Directed ​ ​from​ ​high​ ​to​ ​low​ ​Pressure  ○ Strongest ​ ​where​ ​the​ ​gradient​ ​of​ ​pressure​ ​is​ ​largest  ● Vertical ​ ​pressure​ ​gradient​ ​force  ○ In ​ ​the​ ​vertical,​ ​pressure​ ​gradient​ ​is​ ​directed​ ​upward  ○ Usually ​ ​in​ ​balanced​ ​with​ ​gravity   ○ Balance ​ ​is​ ​called​ ​​Hydrostatic equilibrium  ● Dealing ​ ​with​ ​forces  ○ Wind ​ ​is​ ​air​ ​moving​ ​at​ ​a​ ​constant​ ​velocity​ ​as​ ​the​ ​result​ ​of​ ​one​ ​or​ ​more​ ​forces  acting ​ ​on​ ​the​ ​air  ○ Pressure ​ ​gradient​ ​force  ■ Coriolis ​ ​force​ ​-​ ​Frictional​ ​Force  ■ Centripetal ​ ​acceleration​ ​(centrifugal​ ​force)   ○ Straight ​ ​wind​ ​has​ ​no​ ​acceleration,​ ​meaning​ ​the​ ​net​ ​force​ ​is​ ​0​ ​MA=0  ■ Coriolis ​ ​only​ ​exist​ ​because​ ​of​ ​earth​ ​rotates   ○ Deflects ​ ​wind-changes​ ​wind​ ​direction  ○ Northern ​ ​Hemisphere:​ ​deflection​ ​to​ ​right  ○ Southern ​ ​Hemisphere:​ ​deflection​ ​to​ ​left 

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School: East Carolina University
Department: Atmosphere Sciences
Course: Weather and Climate
Professor: Thomas Rickenbach
Term: Fall 2015
Tags: Cyclones, wind, and speed
Name: notes for week 8
Description: these notes cover class lecture for week 8
Uploaded: 10/21/2017
2 Pages 14 Views 11 Unlocks
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