An aerial view of an island in Fiji, where pre-COP meetings are being held as part of COP31’s Pacific focus. (AFP pic)

PARIS: Australia and Turkey are co-hosting COP31 in November but the highly-unusual decision to share leadership has raised questions about how the climate summit will unfold -- and who holds the power.

Both countries had fought to host the high-profile event, forcing a compromise under which Turkey would stage COP31 but Australia would run the formal negotiations.

The two delegations insist they are working closely together and have pledged steady and predictable leadership at the summit starting Nov 9 in the Turkish city of Antalya.

But the dual-presidency model "has no precedent" at UN climate summits and its success is not guaranteed, said Anna Perez Catala from the Paris-based policy think tank IDDRI.