ThinkRankMovements of Ocean Water
Overview
Ocean water is in constant motion through waves, currents, and tides. This chapter examines the forces behind these movements and their significant impacts on maritime activity and coastal climates.
Learning Objectives
- Contrast the mechanics of waves and ocean currents
- Explain the gravitational causes of tides (Spring/Neap)
- Map the major warm and cold ocean currents globally
- Evaluate the impact of currents on local climates and fisheries
Key Concepts
Ocean Currents
River-like movements of water across the ocean. They are driven by wind, temperature/salinity gradients, and the Coriolis force.
Tidal Dynamics
The rhythmic rise and fall of seal level. Spring Tides occur when the Sun, Moon, and Earth align (Full/New Moon).
Key Terms
UpwellingEbbCoriolis ForceGulf StreamTsunami
Examples
The Humboldt Current
A cold current off the coast of South America that creates rich fishing grounds but also causes arid coastal climates.
Quick Check
- When do 'Neap Tides' occur?
- What drives surface ocean currents?