Why does the ocean have waves? - NOAA's National Ocean Service
2024年6月16日 · Waves transmit energy, not water, and are commonly caused by the wind as it blows across the ocean, lakes, and rivers. Waves caused by the gravitational pull of the moon and the sun are called tides. The ebb and flow of waves and tides are the life force of our world ocean.
What is a rogue wave? - NOAA's National Ocean Service
2024年6月16日 · Rogues, called 'extreme storm waves' by scientists, are those waves which are greater than twice the size of surrounding waves, are very unpredictable, and often come unexpectedly from directions other than prevailing wind and waves.
What are tides? - NOAA's National Ocean Service
2024年6月16日 · Tides are very long-period waves that move through the ocean in response to the forces exerted by the moon and sun. Tides originate in the ocean and progress toward the coastlines where they appear as the regular rise and fall of the sea surface.
Waves - Currents: NOAA's National Ocean Service Education
Coastal currents are intricately tied to winds, waves, and land formations. Winds that blow along the shoreline—longshore winds—affect waves and, therefore, currents. Before one can understand any type of surface current, one must understand how wind and waves operate.
What is a tsunami? - NOAA's National Ocean Service
Tsunamis are giant waves caused by earthquakes or volcanic eruptions under the sea. They speed along as fast as jet planes. As they near land, these waves rear up to great heights and can drown whole islands.
What is a Rossby wave? - NOAA's National Ocean Service
Unlike waves that break along the shore, Rossby waves are huge, undulating movements of the ocean that stretch horizontally across the planet for hundreds of kilometers in a westward direction. They are so large and massive that they can change Earth's climate conditions.
What is sonar? - NOAA's National Ocean Service
2024年6月16日 · Sonar, short for Sound Navigation and Ranging, is helpful for exploring and mapping the ocean because sound waves travel farther in the water than do radar and light waves. NOAA scientists primarily use sonar to develop nautical charts, locate underwater hazards to navigation, search for and map objects on the sea floor such as shipwrecks, and ...
• Students will identify the primary causes for ocean currents and waves. • Students will explain how and why ocean currents vary at different
Making Waves: Ocean Currents - NOAA's National Ocean Service
In this episode: You know about ocean tides, but how much do you know about ocean currents? Watch our three-minute video podcast to learn what puts the motion in the ocean.
How far does sound travel in the ocean? - NOAA's National Ocean …
2024年6月16日 · The channeling of sound waves allows sound to travel thousands of miles without the signal losing considerable energy. In fact, hydrophones, or underwater microphones, if placed at the proper depth, can pick up whale songs …