A321
Flight Crew Air Transport Pilot (ATP)
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Executed Go Around / Missed Approach; Flight Crew Took Evasive Action
Human Factors; Airspace Structure; Procedure
Night time. Pilot Monitoring. Visual Runway 16L Denver. Cleared for visual Runway 16L. ATC advised [other] flight on approach to parallel runway 'above and behind.' We reported aircraft in sight. Soon after I stated to Captain they were overtaking and rapidly descending. Received a descending RA (Resolution Advisory) and complied. Resolution was resolved and a second descending RA shortly followed. Recovery initiated including slight left turn to provide distance from encroaching aircraft. Recovery was reported to ATC and we advised approach would be continued. Best option at the time because RA commanded descent and go around would have been opposite resolution and climbed into other aircraft. After second conflict was resolved we received a third RA which commanded a climb. Go-around was initiated at this time.Occurred because [other] aircraft cleared for a visual on parallel Runway 16L was approaching at much higher rate of speed and excessive descent rate. This was clearly caused by encroaching aircraft excessive rate of speed and descent into our flight path. Although ATC protocol was probably within all of their parameters they (procedures) clearly don't take into account one of the aircraft on the arrival flying in the manner the conflicting aircraft was operating. An adjustment needs to be made here I believe.
A321 First Officer reported multiple Resolution Advisories on approach to land which eventually resulted in a go-around.