om_2 - Ocean in Motion 2: What Causes Ocean Currents and...

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©1998 Project Oceanography Spring Series Ocean in Motion 1 Ocean in Motion 2: What Causes Ocean Currents and How Do We Measure Them? A. Overview 1. The Ocean in Motion -- Circulation In this program, students will learn about the driving forces responsible for ocean circulation. We will show a video clip showing sea level height and describe its connection to ocean circulation. Finally, we will look at different ways in which we can measure ocean currents. 2. Contents of package Your packet contains the copies of the following activities: I. Temperature-driven and Density currents II. Salinity-driven and Density currents III. Wind-driven currents IV. Demonstrating the Coriolis Effect B. Program Preparation 1. Focus Points O Ocean Circulation: a. uneven heating and cooling is largely responsible for circulation b. two main classes of currents 1. wind-driven currents 2. density-driven currents c. ocean circulation covers a wide scale of motion (space and time) d. many different ways to measure the scales of motion e. ocean motion can be tracked using dissolved chemicals acting as invisible dyes C. Showtime 1. Broadcast Topics This broadcast will link into discussions on ocean circulation, global water temperature and its effect, and changing seasons.
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©1998 Project Oceanography Spring Series Ocean in Motion 2 a. Driving Forces Energy from the sun and tidal forces drive ocean currents. Wind-driven and density-driven currents are described. Follow-up activities : 1. Temperature and Density-driven currents. 2. Salinity and Density-driven currents. 3. Wind-driven currents. b. Resulting Circulation A video clip from NASA’s Jet Propulsion Lab shows the modeled height of the global sea surface resulting from the forcing factors described. In general, water flows from 'high' level regions to 'low' level regions, with some circulation because of the earth's rotation. Follow-up activity:
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om_2 - Ocean in Motion 2: What Causes Ocean Currents and...

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