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AIR PRESSURE FORCES AND WIND
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HL 102.299.8 101.4100.6 600 km Pressure Gradient Force= 2.4 kPa / 600 km = 0.4 kPa / 100 km Definition: The difference in atmospheric pressure per unit distance PGF acts at right angles to isobars of equal pressure
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Where are winds strongest ? Oct 18, 2004 Solution: HUDSON BAY Check the spacing of the isobars of equal surface pressure
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Source: NASA
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Surface roughness decreases wind speed Reduces impact of Inertial Coriolis Force Winds cross isobars, spiralling out of ANTICYCLONES (H), and into CYCLONES (L) H L
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weather.unisys.com
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H L Air tends to be unstable in low pressure (tendency to rise) Air tends to be stable in high pressure (tendency to fall)
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1.Equatorial Low Pressure Trough 2.Subtropical High Pressure Cells 3.Subpolar Low Pressure Cells 4.Weak Polar High Pressure Cells
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How does this relate to the “jet stream”?
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Geostrophic wind (above strong influence of friction)
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CHAPTER 10
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Sonic transducers ULTRASONIC SOUND WAVES DETERMINE WIND SPEED, DIRECTION & TEMPERATURE
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http://www.wrds.uwyo.edu/wrds/rmfres/fendrift.html
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Also SW Ontario
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VANCOUVERLETHBRIDGE 8°C8°C 12°C X X Cooling At MALR 6°C/km Warming At DALR 10 °C/km Cooling At DALR 10 °C/km Cooling At MALR 6°C/km Warming At DALR 10 °C/km More sensible heat
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Santa Ana Winds
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Buried Portion Exposed section Entrained Particle
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A. Polar cell B. Hadley cell C. ITCZ D. Ferrel cell Which circulation cell extends from the equator to the subtropics?
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A. Polar cell B. Hadley cell C. ITCZ D. Ferrel cell Which circulation cell extends from the equator to the subtropics?
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A. Polar cell B. Hadley cell C. ITCZ D. Ferrel cell Which circulation cell extends from the subpolar lows to the poles?
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A. Polar cell B. Hadley cell C. ITCZ D. Ferrel cell Which circulation cell extends from the subpolar lows to the poles?
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A. Polar cell B. Hadley cell C. ITCZ D. Ferrel cell Which circulation cell extends from the subtropics to the subpolar lows?
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A. Polar cell B. Hadley cell C. ITCZ D. Ferrel cell Which circulation cell extends from the subtropics to the subpolar lows?
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A. trade winds B. westerlies C. ITCZ D. easterlies Which global wind belt is between the subtropical highs and the subpolar lows?
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A. trade winds B. westerlies C. ITCZ D. easterlies Which global wind belt is between the subtropical highs and the subpolar lows?
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A. trade winds B. westerlies C. ITCZ D. easterlies Which global wind belt is between the ITCZ and the subtropical highs?
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A. trade winds B. westerlies C. ITCZ D. easterlies Which global wind belt is between the ITCZ and the subtropical highs?
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A. cyclone B. jet stream C. tornado D. semi permanent cell What occupies the region labeled “A”? A
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A. cyclone B. jet stream C. tornado D. semi permanent cell What occupies the region labeled “A”? A
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A. isotherms B. isobars C. pressure heights D. isohyets What are the dashed lines? A
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A. isotherms B. isobars C. pressure heights D. isohyets What are the dashed lines? A
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A. many isobars B. a cold front C. a middle latitude cyclone D. Rossby waves What do the lines on this map show?
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A. many isobars B. a cold front C. a middle latitude cyclone D. Rossby waves What do the lines on this map show?
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A. summer B. winter C. fall D. spring Which season is depicted in the photo?
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A. summer B. winter C. fall D. spring Which season is depicted in the photo?
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A. New York B. Florida C. Texas D. California Where will the Santa Ana winds likely occur?
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A. New York B. Florida C. Texas D. California Where will the Santa Ana winds likely occur?
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Which type wind is depicted? A. katabatic wind B. land breeze C. sea breeze D. Santa Ana wind
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A. katabatic wind B. land breeze C. sea breeze D. Santa Ana wind Which type wind is depicted?
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