tides

We went to the beach to make a labyrinth around 6:00 this evening . . . the tide was in . . .therefore, beach (the sand for our designing) was all awash underwater.

Notice how in these two pictures of the fishing pier at Kells Bay, the tide changed the level of the water about the height of 14 steps on the fishing pier.

low tide

high tide

That is a lot of ebb and flow.

If the pull does this to the ocean, is it any wonder our moods are affected too?

The tides are reminding me that what I see/experience/know now will look a bit different in a while.  “Go with the flow,” has renewed meaning.

Here is some very basic info on tides that might interest you.  It did me . . . from a website found by googling “tides & the moon.”  If you go to the site, you can see a graphic of the pull of the moon at new moon times and full moon times as much more dramatic than when it is a quarter or three quarter moon.

Ah, I suspect the “old ones” of Kells Bay were more attuned to such things than I am.

The word “tides” is a generic term used to define the alternating rise and fall in sea level with respect to the land, produced by the gravitational attraction of the moon and the sun. To a much smaller extent, tides also occur in large lakes, the atmosphere, and within the solid crust of the earth, acted upon by these same gravitational forces of the moon and sun.What are Lunar Tides
Tides are created because the Earth and the moon are attracted to each other, just like magnets are attracted to each other. The moon tries to pull at anything on the Earth to bring it closer. But, the Earth is able to hold onto everything except the water. Since the water is always moving, the Earth cannot hold onto it, and the moon is able to pull at it. Each day, there are two high tides and two low tides. The ocean is constantly moving from high tide to low tide, and then back to high tide. There is about 12 hours and 25 minutes between the two high tides.
Tides are the periodic rise and falling of large bodies of water. Winds and currents move the surface water causing waves. The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon. Another bulge occurs on the opposite side, since the Earth is also being pulled toward the moon (and away from the water on the far side). Ocean levels fluctuate daily as the sun, moon and earth interact. As the moon travels around the earth and as they, together, travel around the sun, the combined gravitational forces cause the world’s oceans to rise and fall. Since the earth is rotating while this is happening, two tides occur each day.
What are the different types of Tides
When the sun and moon are aligned, there are exceptionally strong gravitational forces, causing very high and very low tides which are called spring tides, though they have nothing to do with the season. When the sun and moon are not aligned, the gravitational forces cancel each other out, and the tides are not as dramatically high and low. These are called neap tides.
Spring Tides
When the moon is full or new, the gravitational pull of the moon and sun are combined. At these times, the high tides are very high and the low tides are very low. This is known as a spring high tide. Spring tides are especially strong tides (they do not have anything to do with the season Spring). They occur when the Earth, the Sun, and the Moon are in a line. The gravitational forces of the Moon and the Sun both contribute to the tides. Spring tides occur during the full moon and the new moon.Neap Tides
During the moon’s quarter phases the sun and moon work at right angles, causing the bulges to cancel each other. The result is a smaller difference between high and low tides and is known as a neap tide. Neap tides are especially weak tides. They occur when the gravitational forces of the Moon and the Sun are perpendicular to one another (with respect to the Earth). Neap tides occur during quarter moons.
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One Comment

  1. In the West Country of England we caught the same tides–tides that would leave a fishing boat high and dry about a mile or more inland up a riverbed. Powerful, indeed, and thought provoking.

    Reply

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