Tides

A:

An ebb tide occurs when a tidal current moves away from land. Tidal currents moving toward land are called floods. Ebbs and floods are categorized as reversing currents.

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  • How Are Sea Waves Formed?

    Q: How Are Sea Waves Formed?

    A: Many factors impact the generation, severity, frequency and strength of ocean waves. One of the most important factors leading to the formation of an ocean wave is the wind. The shapes of the basins of the ocean dictate the ocean's regular movements and also affect waves.
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  • What Are Lunar Tides?

    Q: What Are Lunar Tides?

    A: According to Science and the Sea, lunar tides are the most common tides and are caused by the Moon's gravity. Although the Sun's gravity is stronger, it is farther from the Earth than the Moon, which is why lunar tides are more than two times stronger than solar tides.
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  • How Often Do Tides Occur?

    Q: How Often Do Tides Occur?

    A: Ocean tides are caused by the gravitational pull of the Moon and Sun. Due to the rotation of the Earth, locations will experience two high and two low tides each day. An alignment of the Sun and Moon will result in more extreme tides, known as spring tides.
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  • Q: What Causes Tidal Waves?

    A: Tidal waves are caused by the gravitational pull of the sun and moon on the Earth. The moon's gravitational pull has a greater influence on Earth because it is closer. The moon creates a bulge in the ocean on the side of Earth closest to it.
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  • Q: What Can You Learn From Tide Tables?

    A: Tide tables can tell you when the water level will be at its highest and lowest at a particular location. Tide tables can also be used to predict the height of water at times between high and low tide.
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  • What Is the Most Common Tidal Pattern Around the World?

    Q: What Is the Most Common Tidal Pattern Around the World?

    A: The most common tide pattern around the world is that of semi-diurnal tides. This pattern contains two high tides and two low tides of the same height occurring in a 24-hour period. Semi-diurnal tides occur when the moon is over the equator.
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  • How Do the Tides Work?

    Q: How Do the Tides Work?

    A: According to the National Oceanic and Atmospheric Administration, the tides are caused by the gravitational force that pulls on the water and the forces exerted by the moon and the sun. The gravitational pull of the moon cause the ocean to bulge out in its direction, while another bulge occurs on the opposite side of the earth.
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  • Q: How Do Waves Work?

    A: When the sun heats the air, it causes the air to become lighter and float upwards. When hot air floats upwards, cooler air rushes in to take its place. The rush of the cool air against the water creates ripples, which eventually turn into waves.
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  • Q: Who Invented Tidal Energy?

    A: Tidal energy has been used since the early Middle Ages in Europe; no one person is credited with inventing it. The earliest record of communities using the power of waves to generate energy for paddlewheels dates from the 10th century.
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  • Q: Why Are There Tides?

    A: Tides form when the gravitational forces of the moon and sun act on the Earth as it spins around its axis. Tides are the rise and fall of the sea level in reference to land. For example, spring tides are the result of the alignment of the sun, moon and Earth that typically occurs during new and full moons.
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  • Q: How Do Tides Affect Marine Life?

    A: Tides affect marine life by causing fish to gather in one spot, depending on the species and water depth. Strong tidal currents cause a concentration of bait and smaller fish that attracts larger fish to the area. Predicting tides is a tool fishermen use to improve their catches.
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  • Q: Where Can You Find Information About Local Tides?

    A: Find information about tides at Tides4Fishing.com or TidesAndCurrents.NOAA.gov. Tides4Fishing.com features tide tables and related data for the U.S. East, West and Gulf Coasts, and Hawaii and Alaska. TidesAndCurrents.NOAA.gov features tide tables and related data for these locations and for other U.S. territories, and for many Pacific and Caribbean islands.
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  • Q: How Are Tidal Waves Formed?

    A: Tidal waves are caused by the gravitational fields of the sun, the moon and the earth. A tidal wave is a small, regularly occurring wave caused by the shifting of the tide.
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  • Q: Is There a Red Tide in Siesta Key, Fla.?

    A: The beaches in Siesta Key, Fla. periodically experience red tide, a condition that occurs when high levels of red-tinted and harmful algae are present in the water. During red tides, the ocean water may display a reddish-brown hue.
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  • Q: What Are High Tides and Low Tides?

    A: Low tides and high tides occur as a result of gravitational forces between the moon and Earth. There is a gravitational force exerted on every object on the planet by the moon. The effect of the gravitational force is more apparent on bodies of water than it is on land.
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  • Q: What Causes Neap Tides?

    A: All tides, including the cycle of spring and neap tides, are caused by the gravitational pull of the sun and moon on Earth's ocean tides. Each month, the angles and alignment of the sun, moon and Earth work to influence the cycle of tides.
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  • Q: What Causes Waves?

    A: Waves are caused by wind blowing on the ocean surface. Stronger winds cause larger waves. Variations in wind speed and duration determine the size and frequency of waves. The horizontal length of the wave is established by the horizontal distance between its two crests and the vertical length is established by the vertical distance between the crests. Large waves can also be created by undersea seismic activity.
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  • Why Is the Bottom Layer of the Ocean the Coldest?

    Q: Why Is the Bottom Layer of the Ocean the Coldest?

    A: The bottom layer of the ocean is the coldest because cold water has a higher density than warm water. The colder water sinks to the bottom of the ocean. This movement of water creates the ocean currents.
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  • Q: What Is the Fetch of a Wave?

    A: Fetch is the distance that wind has traveled over open water without encountering an obstruction. In normal circumstances, long fetches create larger, more powerful waves than short fetches.
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  • Q: What Is a Spring Tide?

    A: A spring tide is the tide which occurs at the time of full moon and new moon. The difference between the highest and the lowest rise of tides is highly pronounced during spring tide, and hence it can be easily distinguished.
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  • What Are the Characteristics of All Waves?

    Q: What Are the Characteristics of All Waves?

    A: Characteristics that all waves have in common are wavelength, amplitude and frequency. Apart from these properties, different types of waves have a number of varying characteristics. A wave is defined as a repetitive disturbance traveling through a medium going from one location to another.
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