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Ocean currents, winds and tempurature

Ocean currents, winds and tempurature. Megan and Charline ;) Science. Currents. Currents-continuous movements of water Surface Currents-flow in the top 100-200m of water

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Ocean currents, winds and tempurature

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  1. Ocean currents, winds and tempurature Megan and Charline ;) Science

  2. Currents • Currents-continuous movements of water • Surface Currents-flow in the top 100-200m of water • Thousands of objects that are lost at sea like a bottle for example get eventually washed up on shore because it is carried by a current • Three factors influence the direction of winds and surface currents: -uneven heating of the atmosphere -rotation of Earth -continents

  3. Salinity • Has a lot to do with all of the ocean, because salinity measures the amount of salt in a body of water • On average 3.5% of the ocean water is made up of salt that means that 96.5% is just water.

  4. Air • Currents on top of water is driven by winds also known as air • Three factors influence the direction of winds and surface currents: -uneven heating of the atmosphere -rotation of Earth -continents • Affects water from 100-200 m deep in the ocean

  5. Hands on activity… • MATERIALS • 4 Baby food jars • 2 Laminated index cards • Table salt • 2 Colors of food coloring • Stir stick • Dish pan (for spills) • Towels

  6. What to do- • Fill both baby food jars with water. Dissolve the salt in one of the jars and add blue food coloring. Make sure to mark the jar "Salt Water." Add a drop of red food coloring to the other jar and label it "Fresh Water." • Place a 3 x 5 index card on top of the salt water and carefully invert it. Place the salt water jar on top of the fresh water container and have someone carefully remove the card. Observe the results. • Use the second set of jars to repeat the experiment. This time, invert the fresh water jar over the salt water jar. Remove the card, and observe the results. • Take both sets of jars, turn horizontally, remove the card and observe the results. • Is salt water heavier or lighter (higher or lower in density) than fresh water? Make sure that you explain your answer in terms of the results that you obtained from your experiment. If evaporation causes surface water to be salty, where would you expect ocean water to be very dense? Does this correspond to where deep ocean currents originate? If not, can you explain why? Does the density of ocean water have any relationship to the temperature of ocean water?

  7. Gulf Stream • Is a warm ocean current that flows from the gulf of Mexico northward through the Atlantic ocean • Is one of the most studied current systems • This extensive western boundary current plays an important role to carry heat and salt to the European subcontinent

  8. El Niño Is a YEAR of bad weather! And it is a cause of some really wacky weather. Produces a short-term warning. Feucht- wet Warm- warm Windschub- Wind shear Thermokline- current Bei- by Normale- normal

  9. La nina • Is the exact opposite of El Nino • La Nina means little girl (DID YOU KNOW???) • It names the appearance of cooler than normal water in the Eastern and Central Pacific Ocean • Is the anti- El Nino

  10. Sir Gilbert Walker • The Walker Circulation was named after him because he figured out that the weather is a global phenomenon • Scientists still believed that the strange phenomenon occurred independently of any other weather patterns • Sir Gilbert Walker was stationed in India studying Monsoons • And also the head of India's Meteorical Service • Is/was British What's in a name? Scientific types refer to what the public thinks of as El Niño as ENSO -- El Niño combined with Southern Oscillation - reflecting Bjerknes' finding that the entire phenomenon depends on an interaction between the atmosphere and the ocean, just as Walker had predicted 50 years earlier. http://library.thinkquest.org/20901/media/walker.gif

  11. Sources • http://media.rd.com/rd/images/rdc/mag0805/cutting-back-on-salt-01-af.jpg • http://www.hickerphoto.com/data/media/171/ocean_currents_t1384.jpg • http://oceancurrents.rsmas.miami.edu/atlantic/gulf-stream.html • http://www.nbc33tv.com/files/nbc33tv/media/la_nina_diagram2.png • Science 8 textbook • Microsoft Excel (graph)

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