Coriolis Force: How does the Earth's rotation modify the Wind?
Wind does not cross the isobars at right angles as the pressure-gradient force directs.
All free-moving objects, including wind, are deflected to the right of their path of motion in the Northern Hemisphere and to the left of their path of motion in the Southern Hemisphere.
The reason for this deflection is the Coriolis force:
where m is the mass and u is the velocity vector of a fluid parcel, and is the rotation vector of the Earth.
The magnitude of the Coriolis force is:
where is the latitude, f = 2 sin is called the Coriolis parameter, and u is the magnitude of the velocity.
The Coriolis force written in vector form clearly indicates that
It is directed at right angles to the direction of air flow.
It affects only wind direction, not the wind speed.
Its magnitude is affected by wind speed (the stronger the wind, the greater the deflecting force).
Its magnitude increases from zero at the Equator to a maximum at the poles.
The Coriolis force thus has the effect of deflecting air flow. It also has the effect of deflecting ocean currents.
It's called the 'Coriolis effect'. In the northern hemisphere, they rotate clockwise. South of the equator, they rotate counter-clockwise.
The fall equinox occurs in September in the Northern Hemisphere.
In the Northern Hemisphere, the Sun apparently rises in the east and sets in the west. In the Southern Hemisphere, it is the other way around. The Sun rises in the west and sets in the east. Note that the Sun does not actually move, it is Earth that makes it appear to move.
The Equator, the imaginary line like a belt round the Earth, divides the world into two hemispheres. the Northern Hemisphere and the Southern Hemisphere
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In the northern hemisphere, yes.
In the northern hemisphere the circulation around a high is clockwise. In the southern hemisphere the circulation around a high is counter-clockwise.
Counter-clockwise in the Southern Hemisphere, and clockwise in the Northern Hemisphere.
clockwise
In the Northern hemisphere, the direction is clockwise... In the Southern, it turns anti-clockwise.
Tornadoes in the northern hemisphere usually rotate counterclockwise, while tornadoes in the southern hemisphere typically rotate clockwise. This is due to the Earth's rotation and the Coriolis effect.
In the northern hemisphere, ocean currents generally flow clockwise due to the Coriolis effect, which is caused by the Earth's rotation. This effect causes moving fluids to curve to the right in the northern hemisphere and to the left in the southern hemisphere.
Anticyclones in the northern hemisphere rotate clockwise.
They circulate clockwise in the Northern Hemisphere, and counter clockwise in the Southern Hemisphere.
A typhoon in the northern hemisphere rotates counter-clockwise, in contrast to a typhoon in the southern hemisphere which rotates the other way (i.e., clockwise) as explained by the Coriolis effect.
Most tornadoes in the northern hemisphere spin counter clockwise while most in the southern hemisphere spin clockwise.
Tornadoes nearly always spin counterclockwise if they are in the northern hemisphere and clockwise if they are in the southern hemisphere.