Oceanography — The Study of the Seas

Oceanography studies the world's oceans, which cover 70% of Earth's surface and drive global climate, ecosystems and weather.

Four Classical Branches

• Physical oceanography — waves, tides, currents, heat transport.
• Chemical oceanography — salinity, nutrients, carbon cycle.
• Biological oceanography — marine food webs and productivity.
• Geological oceanography — sea-floor features and plate tectonics.