Ocean Resources

Mr. SilvaAg Earth Science

Fresh Water from the OceanFresh Water from the Ocean

• Fresh water supplies are limited

• Many developing countries lack a source of fresh water.

• Distillation, is starting to increase.– Three methods:

• Heating• Freezing • High pressure

• Fresh water supplies are limited

• Many developing countries lack a source of fresh water.

• Distillation, is starting to increase.– Three methods:

• Heating• Freezing • High pressure

Mineral from the OceanMineral from the Ocean

• The ocean is a large source of minerals, its just very costly to harvest the minerals.

• Each cubic kilometer= 6kg of gold

• Nodules high in iron, copper, nickel, cobalt, phosphates.

• Only grow 1-10 mm every million years!

• Petroleum (oil)- limited supply and is being depleted faster than produced.

• The ocean is a large source of minerals, its just very costly to harvest the minerals.

• Each cubic kilometer= 6kg of gold

• Nodules high in iron, copper, nickel, cobalt, phosphates.

• Only grow 1-10 mm every million years!

• Petroleum (oil)- limited supply and is being depleted faster than produced.

Food from the OceanFood from the Ocean

• Over half a billion people in the world lack protein in their diet.

• Fish is a great source of protein.

• Aquaculture (farming of the ocean), can solve many of those problems.

• Problem is a lot of nutrients are on the bottom of the ocean.

• Over half a billion people in the world lack protein in their diet.

• Fish is a great source of protein.

• Aquaculture (farming of the ocean), can solve many of those problems.

• Problem is a lot of nutrients are on the bottom of the ocean.

Ocean-Water PollutionOcean-Water Pollution

• Until recently, most waste was diluted, or destroyed as it spread throughout the ocean.

• Increased about of – Lead– Insecticides– Plastic

• Until recently, most waste was diluted, or destroyed as it spread throughout the ocean.

• Increased about of – Lead– Insecticides– Plastic

Ocean Currents Ocean Currents

• A. Surface Currents Move in a Circular Motion!!

– 1. Winds affect surface currentsa. Wind provides energy to the water, causing

movementb. Winds move along latitude lines in opposite

directions• i. Tradewinds: Above & below the

equator•Currents blow toward the equator line

– Westerlies: In the middle latitude zones– Currents blow toward the poles

• A. Surface Currents Move in a Circular Motion!!

– 1. Winds affect surface currentsa. Wind provides energy to the water, causing

movementb. Winds move along latitude lines in opposite

directions• i. Tradewinds: Above & below the

equator•Currents blow toward the equator line

– Westerlies: In the middle latitude zones– Currents blow toward the poles

Ocean CurrentsOcean Currents

• 2. Earth’s rotation affects surface currents

– a. The Coriolis effect is the deflection of the earth’s winds and ocean currents caused by the earth’s rotation

– b. The water flows in a circular motion

• Northern Hemisphere: clockwise• Southern Hemisphere: counter-clockwise

• 2. Earth’s rotation affects surface currents

– a. The Coriolis effect is the deflection of the earth’s winds and ocean currents caused by the earth’s rotation

– b. The water flows in a circular motion

• Northern Hemisphere: clockwise• Southern Hemisphere: counter-clockwise

Ocean CurrentsOcean Currents

Ocean CurrentsOcean Currents

Ocean CurrentsOcean Currents

• B. Deep Ocean and Air Currents– 1. Currents move in a circular

motion that is affected by temperature– 2. Temperature inversion: when

warm temperatures are above the cooler temperatures either in the oceans or the atmosphere

• Cold water (near the poles) sinks because it is more dense

• Warm water (near the equator) rises because it is less dense

• B. Deep Ocean and Air Currents– 1. Currents move in a circular

motion that is affected by temperature– 2. Temperature inversion: when

warm temperatures are above the cooler temperatures either in the oceans or the atmosphere

• Cold water (near the poles) sinks because it is more dense

• Warm water (near the equator) rises because it is less dense

Ocean CurrentsOcean Currents

3. Convection: the circular pattern made by water or air caused by the differential heating of earth

a. Ocean water is heated unevenly due to the depth of the ocean and the heat energy from the sun

– Pressure differences in the atmosphere (warm air is less dense, cold air is more dense) cause uneven heating and form convection cells around the earth

• These patterns of circulation globally distribute the heat among ocean waters and the atmosphere

3. Convection: the circular pattern made by water or air caused by the differential heating of earth

a. Ocean water is heated unevenly due to the depth of the ocean and the heat energy from the sun

– Pressure differences in the atmosphere (warm air is less dense, cold air is more dense) cause uneven heating and form convection cells around the earth

• These patterns of circulation globally distribute the heat among ocean waters and the atmosphere