Ocean Gyres and Geostrophic Flow
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- Опубликовано: 26 июн 2024
- The circulation pattern in the ocean gyres is an example of geostrophic flow. Geostrophic flow is a type of particle motion that occurs when the forces acting on particles are so weak relative to the influence of the rotation of the Earth, that Coriolis deflection is the factor that determines the direction of motion.
Related content:
Coriolis Effect : • Coriolis Effect
Water on Earth: • Water on Earth
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how can i hug you?!?!?!?!?!! holy smokes! THIS VIDEO SAVED ME AN HOUR OF LECTURES!!
Glad you found it helpful! Thanks for commenting.
It saves so much of my time on understanding both the concepts of geostrophic flow and gyre!
A million thanks for this!
One of the best detailed and technical on the subjects, there are lot of videos but were superficial, this one is coming from knowledgeable person. Thank you Sir.
Great video! We were writing all of these in huge formulas on the blackboard while at University. Here it is displayed in graphics and visualized very well! Thanks a lot
That's so interesting. You make it so easy to understand new concepts. Please keep making videos. Thanks again.
Thank you for the kind words
THANK YOU for not including plastic in this fantastic easy-to-understand explanation to "gyros"!
+1 sub!
Thanks for the sub!
This was so concise and easy-to-understand. Excellent explaination - thank you so much
Very good video! Thanks a lot, very informative and simple to understand
*That's a new view on this, interesting!*
Great explanation!
Thank you!
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Glad you liked it!
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Very good content.Very much understandable.Thank you.
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That was fantastic!
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great supplement to lecture material thank you so much
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Well explained. Thanks 😊👍
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your explanation saved me. Thank you.
Glad it helped. Thanks for letting me know!
@@SciencePrimer if you could make some more videos on earth science it would be of immense help for many of us. Before going into the maths this video of yours which is so concise helps in understanding the physical working of systems. And once in mind the maths gets simpler.
Thanks for video keep going 🤠 greeting from Morocco*
Thanks for the clear explanation! I was just wondering about 1 part of the video:
@3:46 arrows describing the waterflow around the bulge are drawn counterclockwise, but shouldn't these be clockwise. Or is that an example of the flow in the Southern hemisphere gyres?
Yes the example given at the end must be occurring in the southern hemisphere given the direction of flow shown in the diagram.
Thank you... it hel me....
Glad to hear that
Thank you for the amazing explanation.
When you're describing that the higher water caused by Ekman transport has higher pressure compared to it's surrounding, what kind of pressure do you exactly mean? Is it atmospheric pressure or water pressure?
I don't study natural science as much so I apologize for my lack of knowledge about pressure.
In this video, it is water pressure. Although, the atmospheric is a similar concept.
There is literally a mound of water sitting in the middle of the gyre. This is an unstable condition. The force of gravity pulling on the mound acts to level it out. Without Ekman transport continuously pushing more water towards the center of the mound, it would level out.
It may help to think about all of the water as a pile of ballbearings or small marbles. You’d have a hard time making a big steep pile of either of type of ball because as you pushed more balls up to the top of the mound, the balls at the top would push down on the balls below. This pressure from above would push balls lower in the pile away from the center. Acting to level the pile out. That is what is meant by high pressure in this case. It is relative to the surrounding area.
I made a video on pressure gradient force a while ago. It focuses on the atmosphere, but may help you make sense of what is going on in the gyre: ruclips.net/video/EgHEQGe7kJw/видео.html
Let me know if this helps.
@@SciencePrimer I think atmospheric pressure is a straightforward concept, it basically says the amount of weight or force given by air in an area (forgive me for my errors, I'm not a physics student). But water pressure had some more complexity to it right? As far as I've studied it, there are different kinds of water pressure, one of which is head pressure, which I can't seem to understand, hence I've stayed away from learning about it till now.
Your analogy of small marbles are quite difficult to understand for me as I haven't really did nor saw those kind of things, but your explanation of the rate of water flowing inwards being greater than the water flowing outwards made the gyer concept much easier to imagine, and I've had a clearer grasp of it now. It'd be great if these kind of details would exist in your future videos
Anyway, thanks for clarifying that it's atmospheric pressure man. Really appreciate the attention you give to the comment section. Huge love to your channel ! :)
Water pressure does drive different dynamics in different circumstances. The key here is how a gradient in pressure across a region causes particle motion.
Atmospheric pressure is the pressure a mass of air exerts over an area. When you have a region of high pressure next to a region of low pressure the air pushing down in the high pressure region pushes air near the ground out towards the surrounding lower pressure regions. This is what causes wind. Because this is occurring on a rotating planet, Coriolis Force causes the wind to rotate.
The same thing is going on here in the water. The difference in pressure at the center of the mound relative to the surrounding areas, that is the pressure gradient force causes water to flow away from the center of the mound.
In what context are you using head pressure? I've only heard it used in the context of pumps.
@@SciencePrimer I think it is in the context of pumps. So from your explanation, You're saying that water have different types of pressure depending to different situations/contexts?
And that in this situation, head pressure, which mechanics I don't know of, is not causing anything correlated with the Gyre phenomenon, and it is simply the work of gravity and other factors you've mentioned in the video?
Yes. Other forces in the pipe, most notably friction of the water against the wall of the pipe would overwhelm any influence of the effect of the rotation of the earth. The dynamics that drive gyroscopic flow only come into play with things moving slowly over great distances - pipe that is hundreds of miles in diameter and had a tiny head pressure - would exhibit this behavior.
Great explanation sir. Jussojuan
what i dont understand is that you have the cori and the pgf and they balance eachother but how do you know which direction the geo-straphic flow iz in?
Ekman transport and pgf are in balance. Coriolis force turns the out-flowing water to the right in the Northern Hemisphere and to the Left in the Southern Hemisphere. So the Gyre turns clockwise north of the equator and counterclockwise south of the equator.
I don't quite get the explanation around 1:40 : it is said that if the action of gravity is low, then Coriolis becomes the main contribution.
But Coriolis acceleration is proportional to the velocity. So, if the ball is only slightly accelerated by gravity, I expect Coriolis acceleration to be very low as well.
What did I miss?
It might help to think about Coriolis as influencing the direction of motion instead of velocity. Even at a low rate of acceleration, the Coriolis force will change the direction of the resulting motion.
Also, note that gravity is not the only force that can cause acceleration. In the example with the plane, it is gravity, but in the gyres, movement is caused by friction from wind and the pressure gradient force - then, Coriolis changes the direction of that movement.
Why does geastrophic circulaion does not follow its theoretical path ? Why is its actual path different ?
Interesting. We should exploit the concentrating effect of these gyres by sending plastic cleanup vessels right to their middles.
I do believe that is what they are doing in the Pacific.
Why particals in motion does not follow the TP?
Do you mean why isn't it symmetrical?
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Flat Earthers (who continually claim that water is always flat and cannot curve) are gonna hate this
bro
this is so bad i thought i was deaf