Ocean Tides | Flood and Ebb of ocean waters!
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- เผยแพร่เมื่อ 31 ก.ค. 2024
- Continue learning about the Ocean. This week learn about the tides. Subscribe for weekly videos: goo.gl/COrUU6
Mr. Weather’s World is a weekly video series bringing you interesting and reliable information about the Earth Sciences, Space Weather, and Climate Change. Tune in each week for exciting new content with host and meteorologist Curt Silverwood (Millersville University Alum).
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During the summer, you may see High and Low tide times in your weather forecast, but what are tides? Tides are the change in the ocean water level. Each day, there are typically two high and low tides. Usually occurring about 6 hours apart. The change from low to high tide is called the flood tide. The change from high to low tide is called the ebb tide. Tides result from the pull of gravity, between the earth and moon, between the earth and the sun, and the earth alone. The gravitational pull is 178 times stronger than the pull of the moon on the earth, but since the moon is closer to the earth, the tidal pull by the moon is over twice that of the sun. The result of the tidal pull is a bulge in the ocean water almost in line with the position of the moon. One bulge towards the moon and one that is opposite. When tides occur, we are basically seeing the results of the earth rotating under this bulge. The change of water level varies from location to location due to different shaped shorelines and the depth and configuration of the sea floor. So some locations may only experience one high and low tide a day called a diurnal tide. The orbit of the moon also contributes to the variation of tides. If the moon is at its closest to earth, tides will be higher than normal. When the Earth, moon and sun are in line with each other we see a resulting spring tide. Where the height range between high and low tides is the most. Typically, 7 days later the earth, moon, and sun are at right angles and the resulting tide is called the neap tide. It has the smallest height range between high and low tides. Watch Mr. Weather’s World every #WeatherWednesday to learn something new!
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Thanks for watching!
Another great video! Good explanation and cool graphics 😊
Thank you for the feedback 😊
We go with the tides I See you sailing beautifully. One day well ride them together. Isnt that a great thought HANG on that One hahaha 🤣🤣🤣 waves can topple you hahaha 🤣 been there done that even rip tide caught me once my older sister grabbed me and pulled me through monica god bless you dear
Hi
Hi Sir
Hi there! How did you enjoy the video? 😊
Is it safe to swim in ebb?
Hi there! I can’t give safety advice, but swimming while the tide is going out and the water is falling would make swimming back to shore more challenging than when there is high tide.
Nice video. And good animated demonstration. But please try to cover more points.
It really depends on which direction you're swimming!😊
Hello, unfortunately yet another video which suggests that you should expect a high tide when the moon is over your head. Are you aware that this is not the case? For a minority of your viewers this will, coincidentally, be true. But they only need to look a hundred miles, either way, along their shoreline to find a much greater number of locations where this is not true. The reason is that there is no direct causal relation.
Hello, thank you for watching the video and giving your feedback. The video does not suggest that the moon is “over your head” so to speak when you have a high tide. It talks about the moons position relative to the earth which causes fluctuations in the level of tide and the extremes (spring and neap tide). In the video, I also mention that the tides I describe are typical but not every location will have the same thing. I’m not misleading viewers, this is for a very general overview of Tides to understand why they occur in the first place. Thank you for stopping by. I appreciate your comment! Perhaps if I do another video on tides in the future then I’d refer back to this video and go in more depth with more detail. Again this is just a general understanding video. 😊
@@MrWeathersWorld Thank you for your reply. But that’s actually my main problem with the explanation. It installs the mistaken notion in viewers that, when they see water rise at their local beach, they are looking at ‘the typical arrival of a bulge, pulled upward by the moon’. In my opinion, you make it sound like the places where the tide arrives when the moon isn’t relatively overhead are the exceptions ‘experiencing some delay due to bathometry and coastline orientation’.
Are you aware that the energy which makes the water rise in the Bay of Fundy was put into the water by the moon’s gravitational attraction almost two days before the water rises and more than 10,000 miles away from Halifax?
If you check the tide tables for Boston, with respect to the next New Moon, you will see that higher water levels are expected two days after the next New Moon rather than at the New Moon.
My problem with your video is that, even though it is meant for general audiences to be aware that tides are related to lunar gravitational attraction, it reinforces the mistaken notion that the tidal rise they see at the beach is ‘water being pulled upwards by the moon’. Very few videos get this right; the ocean tides on Earth are caused by the horizontal ‘tractive’ components of lunar and solar gravitational attraction. The vertical components are negligible.
Kind regards,
Garret