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Thermohaline Circulation/Upwelling/Blue Whales
Thermohaline Circulation/Upwelling/Blue Whales
Salt changes water density: seawater is denser than freshwater
- Water = H2O
- Atoms of opposite charge attract e/o
- Freshwater has H2o molecules that have lots of space b/t them
- In one container (volume) there are only so many H2O molecules
- The weight of the water in that container Β is called DENSITY
- If one adds salt (NaCl or 1 Na+ and Β 1 Cl-) to freshwater, it will DISSOLVE into individual atoms of Na+ and Cl-s
- Atoms place themselves close to opposing charges
Thermohaline Circulation
- Water Β in the ocean is in motion: the wind pushes it around
- As currents move towards cold area its gets colder Β (denser)
- The wind evaporates water but not the salt β seawater becomes also saltier β denser
- Surface water sinks
- Currents at bottom of the ocean that moves βpacksβ of water with different densities (combination of salt/temp.) around the globe Β β THERMOHALINE CIRCULATION
Blue Whales
- The biggest animal on earth: 100-150 tons
- Marine mammals
- Eat tiny animals named krill: more than 4 tons/day
- Blue whales/other marine mammals depend on areas where they can find lots of food, like upwellings
- High energy demand due to size which is why it eats 4 tons
- Krill in areas of upwelling because there are more food/nutrients in the surface waters where the sun shines
Upwellings
- Nutrients accumulate in deep waters as they move out of the photic zone (where nutrients etg used up in photosynthesis) and the remains of organisms sink and decompose
- Upwelling = process of deep, nutrient-rich bottom waters flowing to the surface of the ocean
- When the nutrients reach shallow water, where there is light/tiny algae called phytoplankton can grow. These plants are the basis of the ocean food chain
- Upwelling areas are therefore v important for all animal life: shrimp to blue whales
How does Β it work
- Wind + Coriolis = current flow
- N-hemisphere: right of wind direction
- S-hem: left of wind direction
- Cont
Ocean Currents
- Can be caused by
- Density differences
- Wind
- Oceanographers study many things abt currents
- How currents Β form
- Where Β currents will flow
- How currents will change
- How currents impact the environment
Thermohaline Circulation/Upwelling/Blue Whales
Salt changes water density: seawater is denser than freshwater
- Water = H2O
- Atoms of opposite charge attract e/o
- Freshwater has H2o molecules that have lots of space b/t them
- In one container (volume) there are only so many H2O molecules
- The weight of the water in that container Β is called DENSITY
- If one adds salt (NaCl or 1 Na+ and Β 1 Cl-) to freshwater, it will DISSOLVE into individual atoms of Na+ and Cl-s
- Atoms place themselves close to opposing charges
Thermohaline Circulation
- Water Β in the ocean is in motion: the wind pushes it around
- As currents move towards cold area its gets colder Β (denser)
- The wind evaporates water but not the salt β seawater becomes also saltier β denser
- Surface water sinks
- Currents at bottom of the ocean that moves βpacksβ of water with different densities (combination of salt/temp.) around the globe Β β THERMOHALINE CIRCULATION
Blue Whales
- The biggest animal on earth: 100-150 tons
- Marine mammals
- Eat tiny animals named krill: more than 4 tons/day
- Blue whales/other marine mammals depend on areas where they can find lots of food, like upwellings
- High energy demand due to size which is why it eats 4 tons
- Krill in areas of upwelling because there are more food/nutrients in the surface waters where the sun shines
Upwellings
- Nutrients accumulate in deep waters as they move out of the photic zone (where nutrients etg used up in photosynthesis) and the remains of organisms sink and decompose
- Upwelling = process of deep, nutrient-rich bottom waters flowing to the surface of the ocean
- When the nutrients reach shallow water, where there is light/tiny algae called phytoplankton can grow. These plants are the basis of the ocean food chain
- Upwelling areas are therefore v important for all animal life: shrimp to blue whales
How does Β it work
- Wind + Coriolis = current flow
- N-hemisphere: right of wind direction
- S-hem: left of wind direction
- Cont
Ocean Currents
- Can be caused by
- Density differences
- Wind
- Oceanographers study many things abt currents
- How currents Β form
- Where Β currents will flow
- How currents will change
- How currents impact the environment