How do the pressure gradient, coriolis effect, and friction interact to determine wind direction and speed in the Northern Hemisphere? The Southern Hemisphere? In the upper part of the troposphere away from the influence of the land surface?

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How do the pressure gradient, coriolis effect, and friction interact to determine wind direction and speed in the Northern Hemisphere? The Southern Hemisphere? In the upper part of the troposphere away from the influence of the land surface?



Answer:


-Wind blows from high to low pressure as it follows the wind gradient.
-The coriolis effect is the deflection of moving fluids and objects as a result of Earths rotation. In the Northern Hemosphere there is defleection to the right, in the Southern Hemosphere, there is deflection to the left. Maximum is at the poles. Zero at the equator. THe coriolis effect is proportional to the speed of the moving fluid.
-Friction acts to slow the movement of air. By slowing air movement, friction also reduces the Coriolis force, which is proportional to wind speed. This alters the force balance in favor of the pressure-gradient force with the outcome that there is a movement of air at an angle across the isobars toward the area of lower pressure.

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