1 / 11

Chapter 14 The Movement of Ocean Water

Chapter 14 The Movement of Ocean Water. Standard S6E3d: Causes of waves, currents and tides. Section 1, pp. 416 – 421 EQ: What are ocean currents?. Ocean Currents. Movement of ocean water in a regular pattern Influenced by weather, Earth’s rotation, position of continents.

kizzy
Download Presentation

Chapter 14 The Movement of Ocean Water

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 14The Movement of Ocean Water Standard S6E3d: Causes of waves, currents and tides

  2. Section 1, pp. 416 – 421 EQ: What are ocean currents? • Ocean Currents • Movement of ocean water in a regular pattern • Influenced by weather, Earth’s rotation, position of continents

  3. EQ: What are surface currents? • Surface Currents • Horizontal movement of ocean water near the surface • Controlled by global winds, the Coriolis effect, continental deflections

  4. Global Winds • Blow across Earth’s surface • Near Equator blow east to west • Near Poles blow west to east

  5. The Coriolis Effect • The apparent curving of the path of a moving object due to Earth’s rotation • N. Hemisphere curves clockwise • S. Hemisphere curves counterclockwise

  6. Continental Deflection • Affected by Temperature • Currents change direction when they hit a continent • Currents carry the temp. of its point of origin to its destination • Ex: The Gulf Stream carries warm water to southern England

  7. EQ: What are deep currents? • Deep Current • Streamline movement deep below the surface • NOT controlled by wind • Forms where density increases because of changing temp. & salinity • Less dense water rises to top • Dense water sinks • See p. 420

  8. Summary • Describe how global winds, the Coriolis Effect and continental deflection form a pattern of ocean surface currents. • Explain how salinity controls deep currents.

  9. Section 2, pp. 422-425EQ: How do ocean currents effect climate? • Surface Currents • Warmer than deep currents • Ex: Gulf Stream—warm water • Ex: California Current—cold water

  10. Upwelling • Occurs when local warm winds blow across surface currents & leaves the cold deep currents exposed or uncovered • Cold, nutrient rich deep water rises to the surface • Small fish rise with the cold water • Big fish come in for “dinner”—Example of the food chain

  11. El Nino • Occurs every 2 to 12 years • S. Pacific Trade Winds move less warm water to the W. Pacific • Causes high temp. & decreased trade winds in tropical ocean • Has global impact by changing the interaction between the ocean & atmosphere • Causes extreme weather—drought & floods • Prevents upwelling

More Related