The Science of Tides, Currents, and Ocean Motion

The Ocean in Motion: Earth’s oceans are constantly moving—rising, falling, swirling, and flowing in patterns that shape weather, life, and coastlines.
The Pull of the Moon: Tides are caused by the gravitational pull of the Moon and Sun, creating rhythmic rises and falls of sea levels around the world.
Two Highs, Two Lows: Most coastlines experience two high tides and two low tides each day—a steady heartbeat of the planet.
Currents That Connect Continents: Surface currents, driven by wind and Earth’s rotation, form massive loops that carry heat across the globe.
The Deep Ocean Conveyor: Far below the surface, temperature and salinity drive slow-moving “rivers” of water that circle the planet for centuries.
Tides That Shape Life: Many marine creatures time their feeding, breeding, and migrations to the rhythm of the tides.
Energy in Motion: The power of waves and tides is now being harnessed for renewable energy—turning ocean motion into electricity.
The Role of Coriolis: Because Earth spins, currents curve instead of flowing straight—clockwise in the north, counterclockwise in the south.
Waves Born of Wind: Most ocean waves start when winds transfer energy to the surface—building into the rolling patterns we see from shore.
The Pulse of the Planet: Together, tides, currents, and waves regulate Earth’s climate and connect every ocean, making them the planet’s living circulation system.