Ocean currents and climate for a test

What are ocean currents?

Mass movements of seawater driven by wind, Earth's rotation, and differences in water density.

How do currents influence climate?

Currents transport heat, impacting regional climates and weather patterns.

Example of a major ocean current?

The Gulf Stream, which warms the eastern United States.

True or false: Currents only affect coastal areas.

False, because currents influence weather patterns far inland.

Difference between surface and deep ocean currents?

Surface currents are wind-driven; deep currents are driven by density differences.

Fill in the blank: The __________ current affects the climate of the Northeast U.S.

Gulf Stream

What drives thermohaline circulation?

Differences in water temperature and salinity create density gradients.

Which current cools the west coast of the U.S.?

The California Current.

True or false: Ocean currents can change over time.

True, because climate changes and human activities can shift currents.

Impact of El Niño on currents?

El Niño alters normal current patterns, leading to unpredictable weather globally.

What is upwelling?

A process where deep, nutrient-rich water rises to the surface, promoting marine life.

How does the ocean store carbon?

Oceans absorb CO2, helping regulate the greenhouse effect and climate.

Difference between warm and cold currents?

Warm currents typically raise temperatures; cold currents lower them.

How are ocean currents measured?

Using buoys, satellites, and oceanographic ships to track water movement.

What is the role of the Antarctic Circumpolar Current?

It connects the Atlantic, Pacific, and Indian Oceans, influencing global climate.

Fill in the blank: Ocean currents can affect __________ and precipitation.

temperature

What characterizes a gyre?

A large system of rotating ocean currents, typically found in the ocean's major basins.

How do ocean currents affect marine ecosystems?

They distribute nutrients and organisms, affecting biodiversity and food webs.