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05.02 Ocean Currents Activity

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by

Shazarria Anglin

on 14 August 2014

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Transcript of 05.02 Ocean Currents Activity

Four factors that influence ocean currents
1.
Wind
- Single biggest factor in the creation of surface currents. Strong winds move the surface of water and are not just random breezes. The major winds that most often effect the creation of ocean currents are the westward winds which blow east to west , same as trade winds.
2.
Water Density
- Caused by the amount of salt in a body of waters temperature. Water with a higher salinity or colder water is more dense and likely to sink. Sinking water pushes the water below it up, while the duo of sinking and rising in the same area causes a current.
3.
Ocean Bottom Topography
- Waters contour to the bottom of the ocean floor or bed. If the ocean bottom Drops out of place like a valley or trench, the moving water will move downward. If an ocean bottom was present, the water moving along it will e forced to change directions. The sudden change or downward change of direction causes water displacement.
4.
Coriolis Effect
- Rotating objects that will collide with another moving or stationary force. This creates a new motion, a clockwise movement of water in the northern hemisphere. The other movement is a counterclockwise movement of water in the southern hemisphere. When these currents are deflected by land masses, they create huge ocean currents known as Gyres.
How did the Coriolis effect impact ocean current ?
If you were to be a water parcel traveling poleward given a motion relative to the sea floor that is solely poleward and have speed that i inherited from the earths rotation you would keep your eastward speed because you're not that much attached to the sea floor. You move into a region where the eastward speed is much smaller since latitude circles are smaller. Now since the eastward speeds are greater than the east floor, you started out moving poleward but now moving both poleward and westward. If you were in the Northern hemisphere going north you will end up going North East. If you are in the Southern hemisphere, you would end up going South east. Similarity, if you start off by going towards the equator your eastward speed soon becomes to small for new latitudes so you strt drifting west. If you were in the Northern hemisphere going south, you are now going South West and if you were in the Southern hemisphere going north, you are now going North West. The arguments about how eastward motion turns into NE or SE motion or how westward motion turns into NW or SW motion are harder to comprehend. The two arguments mentioned kind give you a basic understanding of why ocean current motion in the northern hemisphere is clockwise and the southern hemisphere is counterclockwise.
What is the relationship between ocean currents and climate?
Air and ocean currents transfer to one another. The ocean currents rely on the temperatures of the air, gravity, carbon dioxide levels (found in water and air) and lastly the salt content or density of the water itself. If there were to be one disruption to the ocean currents, it could cause an huge impact on the climate which has been known to trigger ice ages in the past.

Example
: Atlantic currents travel form tropical latitudes which warms the European countries at the same rates as cold places in America.
What is upwelling, and why is it important to the marine ecosystem?
Upwelling is known to play an important role in the global energy balance of the ocean and earth. Upwelling in tropical regions allow an accumulation of heat which is made later into higher latitudes by major currents. It also mediate interactions between ocean and atmosphere by speeding oceanic oscillations that affect climate across the entire tropic known as NESO. Upwelling boost biological productivity. The high nutrient concentrations generally found in deeper waters are adverted upward into the photic layer where photosynthesis is promoted.
Which factor in creating currents has the greatest influence on weather patterns?
A Factor that has the greatest influence on weather patterns would be Heat capacity. This influences the worlds climate by storing vast amounts of solar energy around the planet through currents accompanying atmospheric winds.
1. Name and Location of geographic area. Include continent, country, and which coast the are is located on. Include continent, country, and which coast the area is located on.
Marro Bay, California
North America, United States, Pacific Coast
2. Climate: Daytime and Nighttime low average temperature in January and July. Describe climate of the region.
January Temperatures 62 F and 42 F
July Temperatures 65 F and 52 F
Climate Type: Mediterranean- Dry summers, Most rain occurs in winter.
3.Ocean Currents: What ocean is the area on?
What are the major currents that pass by the coastline?
What are the temperatures of the passing currents?
How do these currents influence the local climate?
On the pacific ocean .
The major current is the California current which flows southward from british Columbia. Its temperature is usually around 60 F, keeping the central coast of California cool year round.
05.02 Ocean Currents
By: Shazarria Anglin
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