GEO-SCI 103 Lecture 9Outline of Last Lecture 8: Seawater Density and Ocean StratificationI. Density Layering in the OceanII. Seawater Density and the Role of HeatOutline of Current Lecture 9: Coriolis effect (p. 132-133)I. Earth’s Rotation and the Coriolis Effect A. VelocityB. How the Coriolis Deflection Differs Across LatitudeCurrent LectureI. Earth’s Rotation and the Coriolis EffectA. Velocitya. The velocity of the earth’s surface at these two latitudes are different: 38,400 km/24 hr=1600 km/hr at the Equator and 19,200 km/24 hr=800 km/hr at 60 degrees North Latitude. b. None of the above makes a difference as long as you’re on the earth’s surface, but the minute you become airborne, your velocity at the departure is different than the ground beneath you. c. The velocity of the Earth’s surface increases toward the equator relative to the sideway velocity of the cannon ball (or the air mass of wind)d. Velocity is faster in the lower latitudes (tropical belt) and progressivelyslower towards the higher latitudes (temperate and polar belts)e. Coriolis EffectResults in a deflection of fluid flows: paths are deflected to the right in the northern hemisphere and to the left in the southern hemisphere. Influences motion of fluids, air masses and watermasses1. Caused by Earth’s Rotation2. Air masses and water masses are deflected to the right of the direction of travel in the Northern Hemisphere and to the left in the Southern Hemisphere3. There is greater deflection towards the higher latitudes and no effect at the equator.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.4. Caused by the different velocities on the surface of the earth at different latitudesB. How the Coriolis Deflection differs Across Latitudea. 0 degrees to 30 degrees: 1600 km/hr-1400 km/hr=200 km/hr differenceb. 30 degrees to 60 degrees: 800 km/hr=600 km/hr differencec. 60 degrees to 90 degrees: 0 km= 800 km/hr difference d. The greater the difference between the velocities, the greater the Coriolis Effect (therefore, Coriolis effect is greatest in the higher latitudes)e. Coriolis effect goes to zero at the Equator because it changes direction from the right in the northern hemisphere to the left in the southern
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