
Tides - NASA Science
2025年1月27日 · Rising and ebbing tides happen as Earth’s landmasses rotate through the tidal bulges created by the Moon’s gravitational pull. Our observer sees the tides rise when passing through the bulges, and fall when passing through the low points.
Tide | Definition, Causes, Types, & Facts | Britannica
2025年3月23日 · Tide, any of the cyclic deformations of one astronomical body caused by the gravitational forces exerted by others. The most familiar are the periodic variations in sea level on Earth that correspond to changes in the relative positions of the Moon and the Sun.
Tide - Wikipedia
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon (and to a much lesser extent, the Sun) and are also caused by the Earth and Moon orbiting one another. Tide tables can be used for any given locale to find the predicted times and amplitude (or "tidal range").
What Causes Tides? High and Low Tides Explained - HowStuffWorks
2023年9月8日 · Recent flood trends must have a lot of these people wondering about tidal science. What causes tides? Why do some areas get more dramatic tides than others? And why can't the sea level just stay constant everywhere, all the time? Here, we look at the physics and idiosyncrasies of planet Earth's tides.
Accelerated internal tides in a warming climate - Science
2025年2月19日 · Our findings suggest that internal tides propagate faster in a warming climate, potentially influencing energy cascade and marine biological productivity. Internal tides, primarily generated by periodic tidal flow over seafloor terrain, represent a sort of internal gravity wave oscillating at tidal frequencies.
What Causes Tides? | NOAA SciJinks – All About Weather
2025年2月20日 · High tides and low tides are caused by the moon. The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest …
Video: Global Ocean Tides - Science@NASA
2021年2月24日 · If our planet had no continents, tides would be hemispheric-sized bulges of water moving westward with the moon and sun. This animation shows the tides as a complex system of rotating and trapped waves with a mixture of frequencies.
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.
Tides, Earthquakes, and Volcanoes | Science
2002年7月19日 · A recent paper in Geology (1) makes the strongest case yet for tidal forcing of earthquakes and volcanism at mid-ocean ridges. Gravitational forces exerted by the Moon and the Sun cause ocean tides in the ocean and Earth tides in the solid Earth, with diurnal and semidiurnal periods.
Tides and Water Levels - NOAA's National Ocean Service
Tidal forces are based on the gravitational attractive force. With regard to tidal forces on the Earth, the distance between two objects usually is more critical than their masses. Tidal generating forces vary inversely as the cube of the distance from the tide generating object.
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