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Transcript
Ocean Water • The salt has seeped into the oceans by dissolving out of the rocks, and being carried down rivers into the ocean for millions of years. • Salinity- the concentration of all dissolved salts it contains. – It is lower in places with high amounts of rain and where rivers flow into the ocean. Temperature Zones • Surface Zone – warmer, sunlight heats the top of it – In places where the sun never reaches temperatures can be just above freezing – In between these two is the thermocline. • Water temperatures rapidly fall with depth making the thermocline this boundary between warm and cold water. • WE can feel the thermocline in a lake. Oceans Importance • One of the most important functions of the world’s oceans is to absorb and store energy from sunlight –this helps to regulate temperatures in Earth’s atmosphere. – Absorb over half of the Energy from the sun – Absorbs and releases it slower than the geosphere – Helps to regulate the temperature throughout the world. Ocean Currents • Surface currents: stream-like movements of water that occur at or near the surface of the ocean – Wind driven – Could be warm or cold water • Do not easily mix with one another; therefore, warm water can travel hundreds of miles through cold air. • Can influence the climates of land areas they pass • Deep currents: flow very slowly along the ocean floor.