1. A method for operation of a fuel cell system comprising: providing a fuel cell stack defining a plurality of operating points wherein each of said operating points are characterized by an operating temperature and an operating pressure; providing a cooling system that establishes an actual operating temperature of said fuel cell stack; determining at least one actual operating temperature of said fuel cell stack; and providing a compressed flow of an oxygen containing gas to a cathode inlet at said operating pressure, wherein said operating pressure is controlled such that it represents a minimum pressure necessary to ensure operation of said fuel cell system at an actual operating point defined by said actual operating temperature.