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Lab 7

Lab 7. On this date in Weather History: Hurricane Wilma. Dry vs. Moist Adiabatic Lapse Rate. Saturated T = T d Unsaturated T > T d What lapse rate do we use? T = 56, T d = 50 T = 16, T d = 10 T = 10, T d = 10. Algebra Monster!. “Normal” or “Average” refers to a 30-year average

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Lab 7

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  1. Lab 7 On this date in WeatherHistory: Hurricane Wilma

  2. Dry vs. Moist Adiabatic Lapse Rate • Saturated • T = Td • Unsaturated • T > Td • What lapse rate do we use? • T = 56, Td = 50 • T = 16, Td = 10 • T = 10, Td = 10

  3. Algebra Monster! • “Normal” or “Average” refers to a 30-year average • i.e. The average high temperature today is 58°F. • If the normal number of thunderstorms that occur each May is 10, how often do May thunderstorms occur each year?

  4. Terminal Velocity • Maximum velocity that the object can attain as it falls • Important because the terminal velocity must be greater than the updraft velocity for precipitation to occur • Terminal Velocity (cm/sec) = 1750 * • Must convert cm/sec to mph • Example • Calculate the terminal velocity of a pea with a diameter of 1 cm. • Terminal Velocity = 1750 * • Terminal Velocity = 1750 cm/sec • 1750 (cm/sec) * 0.02236 = 39.1 mph

  5. Sea and Lake Breeze

  6. Sea and Lake Breeze

  7. Pennsylvania Topography

  8. Intertropical Convergence Zone (ITCZ)

  9. ITCZ

  10. El Nino & La Nina • Oscillation in southeastern Pacific Ocean (off the coast of Peru) • El Nino: Warmer than average water temperature • La Nina: Colder than average water temperature

  11. Ekman Transport • Ocean water is set in motion by the winds • Since the earth is rotating, the Coriolis Force is important • Bulk water moves 90° to the right of wind in the NH • Bulk water moves 90° to the left of wind in the SH

  12. Hurricanes!!!

  13. Hurricanes: Wind Velocity & Storm Surge! • Storm surge is cause by the wind; a wind-driven rush of sea into coastal areas as a strong tropical cyclone arrives • Greater wind velocity and wind direction toward shore results in stronger/higher storm surge, and that is found in the right front quadrant of the tropical cyclone • Where would the storm surge be the strongest/highest?

  14. Hurricanes • Saffir-Simpson Hurricane Damage Potential Scale Northeasternquadrant.blogspot.com

  15. Hurricanes

  16. Lab7 • 9.3 a, b, c • 9.12 • 9.15 a, b, c • 9.16 • 10.1 a, b • 10.3 • 10.5 • 10.7 a, b • 11.8 • 11.9 a, b, c • Office Hours: • Thursday 6:30-7:30 6th Floor Walker • Exam Review: • Tuesday from 7:30 to 8:30pm, room 101 or 103 Walker (look for me)

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