What Causes Tides?

Summary

This video explains what causes tides, defining high and low tides, and delves into the moon's gravitational pull as the primary force behind these phenomena. It also touches on the concept of tidal forces creating two bulges of water, leading to two high tides daily. Finally, the video discusses the impact of rising ocean levels on high-tide flooding in coastal communities and how scientists are studying these changes.

Highlights

Introduction to Tides00:00:00

The video introduces the concept of tides as the rising and falling of ocean water twice daily. It defines high tide as the highest point and low tide as the lowest point, highlighting their importance for coastal life.

The Moon's Role in Tides00:00:42

The moon is identified as the main cause of tides due to its gravitational pull on Earth's oceans. Gravity is explained as the force that draws objects towards a center, keeping planets in orbit.

Tidal Force and the First High Tide00:01:22

The moon's gravity pulls on Earth's water, causing it to bulge in the direction of the moon. This phenomenon is called the tidal force, and this bulge represents a high tide.

Explaining the Second High Tide00:01:53

The tidal force affects the entire planet, causing Earth to experience a 'squeeze' that results in two bulges of water on opposite sides. These two bulges explain why there are two high tides each day as Earth rotates through them.

Impact of Climate Change on Tides00:02:38

The video discusses how warming climates and rising oceans are leading to higher high tides, causing flooding in coastal communities. High-tide flooding occurs when tides are approximately 2 feet above average.

Studying High-Tide Flooding00:03:02

Scientists use information from various sources, including NOAA’s GOES-R series weather satellites, to study high-tide floods. This information helps coastal communities plan for the effects of rising tides.