Battlefield air interdiction
Battlefield air interdiction involves air attacks that tend to affect ground combat in hours or days, as opposed to close air support (CAS), which has an immediate benefit for friendly forces in direct contact with the enemy.
It is differentiated from CAS in the degree of coordination and control necessary to prevent "friendly fire" casualties, and the extent to which the air, rather than ground, forces target and schedule it. "The dividing line is not the fire support coordination line (FSCL)" on the combat map, but in the focus of the attacks. 
- Alberts, Donald J. (March-April 1980), "Tactical Air Power within NATO: a growing convergence of views", Air University Review