The Coriolis effect in action

Показать описание

Alex is back in the lab to take a look at the Coriolis effect and demonstrate how this apparent force works.

You may also enjoy:

We are the Met Office, the UK’s national weather service, and every day of the week we bring you a morning weather forecast and an afternoon weather forecast so that wherever you are in the UK we have you covered. Forecasts and any weather warnings are accurate at time of recording.

To ensure you have the most up to date weather information, check the hourly forecast and live warnings on the Met Office website or app.

Рекомендации по теме

Комментарии

This is almost completely useless and does zero to explain Coriolis effect. You would be less informed watching it than if you'd never watched it.

matthewkurtz

Thank you Helen! You spun that paper beautifully!

d.c.monday

Thank you sooo much, that demonstration with the paper made it so clear. I didn't think of doing that. It is much appreciated!

Chris-rbox

That is not a demonstration of Coriolis.

bobsmith

Why would the wind goes straight(along the ruler), won't it rotate with earth following conservation of angular momentum?

henry

Helen distracted me, didn’t get any of that.

precastengineer

cheers fella, top bloke, also thanks Hellen

fanoooooo

There is one problem I am still feel very confused.

I clearly know that, in north hemisphere, the
wind will be bent to the right eventually, and the wind toward equator will generally be northeaster wind (There is also an gif in wiki page that can clearly show this).
The thing that I am struggling to figure out is the poleward wind. Why the poleward wind is not southeaster wind but southwester wind?

Even In the drawing on paper exercise in this video, it's clear that the poleward wind should be initially southeaster after leaving the equator (the edge of the circle)

joe

The Coriolis effect requires 2 reference frames (inertial and non-inertial spinning reference frame). It doesn't involve imaginary hemispheres or hurricanes actually spinning. It's an apparent (not actual) deflection observed by the person in the non-inertial spinning reference frame viewing an object in the inertial reference frame. We never observe the Coriolis Effect while standing on the ground looking at objects in the air because earth is stationary.

TB-xxvj

In this demonstration the ruler represents the air or atmosphere and assumes the atmosphere does not spin with the earth. If this demonstration was a true representation of what is happening, we would have a constant wind at the same speed the earth is spinning. This demonstration is ridiculous.

rockartalan

Just used this demo in my first year university enviro sci lab - thank you for the idea!

madelinerosamond

This demostration is actually wrong, with the ruler and the pencil you're actually drawing a curve line to the east going north ... as yo're drawing for a whole 360° rotation of the paper disk the line eventually seems to go westward, but it's not.

giamau

There is something about the Coriolis Force that bothers me, and I can't quite put my finger on it. The Earth and its atmosphere tend to rotate together...the earth being a solid ball and the atmosphere being a thin, sticky Jello that clings to the solid ball due to gravity. The solid ball that is the earth, does NOT rotate within an atmosphere that is stationary relative to the fixed starfield which surrounds our planet. If this were the case, winds at the earth's surface would be way too strong to support life. However, in our current Coriolis model, when a convection current moves a small parcel of air within that Jello in a northerly or southerly direction, it appears that we detach that parcel from the rest of the atmosphere and trace out its path relative to the fixed star field around earth; but then wouldn't that mean that the people on the earth's surface who are standing at the parcel's "target" latitude feel a wind that has a magnitude equivalent to VTarget - VSource? It seems that a slightly more accurate model of the air parcel's motion would involve treating the air parcel like a gum drop stuck on a radial arm extending from the center of the earth to the earth's surface. This radial arm and the gum drop positioned at the tip of the radial arm at the earth's surface would (in static conditions) move with the rotation of the earth but then experience a torque if there was any change to the angular momentum of the gum drop brought about by north to south movement. Although there appear to be some correct ideas behind the current model of the Coriolis Force, I cannot help but feel that the current model was conceived in a time when many people were still fighting off the idea that the earth was flat and this has left the current model with some gaps that need to be addressed.

kevinelzinga