is deflection is therefore related to the motion of the
object, the motion of the Earth, and the latitude. For this reason,
the magnitude of the effect is given by 2 sin , in which is the
velocity of the object, is the angular velocity of the Earth, and
is the latitude.

The Coriolis effect has great significance in astrophysics and
stellar dynamics, in which it is a controlling factor in the
directions of rotation of sunspots. It is also significant in the
earth sciences,

especially meteorology, physical geology, and
oceanography, in that the Earth is a rotating frame of reference, and
motions over the surface of the Earth are subject to acceleration
from the force indicated. Thus, the Coriolis force figures
prominently in studies of the dynamics of the atmosphere, in which it
affects prevailing winds and the rotation of storms, and in the
hydrosphere, in which it affects the rotation of the oceanic
currents.

Excerpt from the Encyclopedia Britannica without permission.

Atmospheric pressure and wind

Atmospheric pressure (or air pressure) is the weight of air resting on the earth's surface. Pressure is shown on a weather map, often called a synoptic map, with lines called isobars.

• 
  Low pressure occurs when air becomes warmer. The air molecules expand, become lighter and it rises. The pressure numbers on the isobars will be decreasing as it approaches the low pressure zone.
  
  
  


• 
  High pressure occurs when air becomes colder. The air molecules contract, become denser, heavier and sink towards the earth. The pressure numbers on the isobars will be increasing as it approaches the high pressure zone.