Subtropical Gyres and Ocean Currents

The video tutorial introduces oceanography students to the concept of ocean surface currents, focusing on the major subtropical gyres. It explains how wind patterns, such as trade winds and westerlies, influence these currents. The North Pacific Gyre is highlighted, detailing its component currents like the Alaska and California Currents. The tutorial also discusses how ocean currents can be studied using flotsam, with a focus on Curtis Ebbesmeyer's work. The video concludes with a brief mention of lab exercises related to the topic.

What is the primary characteristic of subtropical gyres?

• They flow only in the Southern Hemisphere.

• They are circular loops of water.

• They are triangular in shape.

• They are stationary bodies of water.

How many major subtropical gyres are there in the world's oceans?

• Six

• Three

• Five

• Four

What direction do the gyres north of the equator rotate?

• Clockwise

• Horizontally

• Vertically

• Counterclockwise

How do the Trade Winds affect ocean currents near the equator?

• They have no effect on ocean currents.

• They push water from west to east.

• They cause water to flow in a zigzag pattern.

• They push water from east to west.

Which wind pattern is most influential in the mid-latitudes for moving ocean currents?

• Monsoon Winds

• Prevailing Westerlies

• Polar Easterlies

• Trade Winds

Which current is part of the North Pacific Gyre and flows along the coast of Japan?

• Kuroshio Current

• Alaska Current

• California Current

• North Equatorial Current

What is the significance of the Alaska Current in the North Pacific Gyre?

• It flows clockwise.

• It is part of the South Pacific Gyre.

• It is a warm current.

• It flows counterclockwise.

What is the role of Curtis Ebbesmeyer in the study of ocean currents?

• He developed a new type of ocean current.

• He discovered a new ocean gyre.

• He invented a device to measure water temperature.

• He studied flotsam to track ocean currents.

What is 'flotsam' in the context of oceanography?

• Floating debris used to study ocean currents.

• A type of seaweed found in gyres.

• A rare species of fish.

• A type of ocean wave.

What incident helped scientists understand the circulation of the North Pacific Gyre?

• A freighter accident spilling shoes.

• An oil spill.

• A volcanic eruption.

• A massive storm.