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Vorticity is a term that comes up in a number of earth sciences, especially oceanography. The subject involves more technical detail than most people care to investigate. Here is a very simple definition of vorticity:
“Absolute vorticity describes the rotation of an air parcel. Rotation in the same direction as the Earth's rotation increases the vorticity; rotation in the opposite direction decreases the vorticity. The absolute vorticity is the sum of the planetary vorticity and relative vorticity. Like energy, absolute vorticity is a conserved quantity.
Planetary or Earth vorticity is the component of rotation of an air parcel due to the Earth's rotation.
Relative vorticity is the rotational component due to the movement of an air parcel relative to the Earth's surface.”
Planetary vorticity is called AL-DURDOORIYYA AL-KOWKABIYYA
Planetary vorticity effect would be AL-TA’THEER AL-DURDOORIYY AL-KOWKABIYY or TA’THEER AL-HARAKA AL-DURDOORIYYA AL-KOWKABIYYA.
التأثير الدردوري الكوكبي، تأثير الحركة الدردورية الكوكبية