Currents

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Currents • What is a current? • Are there different types of currents? • What causes currents? • Why are currents important? • What are some major currents?

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Currents. What is a current? Are there different types of currents? What causes currents? Why are currents important? What are some major currents?. Cool Current Facts. The Gulf Stream current transports ten-thousand times as much water as the Mississippi river. - PowerPoint PPT Presentation

Transcript of Currents

Page 1: Currents

Currents

• What is a current?

• Are there different

types of currents?

• What causes currents?

• Why are currents important?

• What are some major currents?

Page 2: Currents

Cool Current Facts

• The Gulf Stream current transports ten-thousand times as much water as the Mississippi river.

• The Gulf Stream flows as fast as 2m/sec or about 4 miles per hour.

• If caught in this current you could be carried almost a hundred miles in one day.

Page 3: Currents

What is a Current?

• A current is defined as a large mass of continuously moving ocean water.

Page 4: Currents

What Causes Currents

• Wind

• Density (salinity/temperature)

• Topography (coasts)

• Coriolis effect (earth’s rotation)

Page 5: Currents

Coriolis Effect• The rotation of the earth

causes moving objects to veer to the right in the northern hemisphere, to the left in the southern hemisphere.

• Objects near the equator are moving much faster than objects near the poles.

Page 6: Currents

Coriolis Effect

Page 7: Currents

Types of Currents

• Surface (wind driven)• Deep (density driven)• Vertical (wind/density driven)

Page 8: Currents

Surface Currents

• Most visible current

• Occur in the top 1 km of the ocean

• Produced by wind and redirected by land and the Coriolis effect

• This Results in a large circular rotation called a Gyre

Page 9: Currents

Gyre

Page 10: Currents

Create a Current Map

• Label the continents

• Label the oceans

• Using your knowledge of surface currents determine and label where the five major Gyres and one circumpolar current are located.

• Use arrows to show the direction of flow.

• Label the major currents.

Page 11: Currents

Major Currents

• California Current• Kuroshio Current• North and South Equatorial Current

• West Wind Drift• Gulf Stream• Peru Current

Page 12: Currents

Global Currents

Page 13: Currents

Thanks to:

Images:http://www.onr.navy.mil/focus/ocean/motion/currents1.htm

http://zebu.uoregon.edu/~js/glossary/coriolis_effect.htmlwww.jimloy.com/science/ shower.htm

www.ldeo.columbia.edu/ ~jean/research.html

Information:http://www.onr.navy.mil/focus/ocean/motion/currents1.htm

http://fermi.jhuapl.edu/student/phillips/

http://www.whoi.edu/coastal-briefs/Coastal-Brief-94-05.html

http://seawifs.gsfc.nasa.gov/OCEAN_PLANET/HTML/oceanography_currents_1.html

http://zebu.uoregon.edu/~js/glossary/coriolis_effect.html


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Fault Currents

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