FILE PHOTO: Turkey's President Tayyip Erdogan shakes hands with Australia's Prime Minister Anthony Albanese before a MIKTA photo session amidst the G20 leaders' summit in Nusa Dua, Bali, Indonesia, November 15, 2022. REUTERS/Ajeng Dinar Ulfiana/Pool/File Photo

ANKARA (Reuters) -Turkey has proposed jointly leading next year's U.N. climate summit with Australia, though the two sides have not yet reached an agreement and the discussions on the hosting standoff remain unresolved, Turkish diplomatic sources said.

Australia and Turkey both submitted bids in 2022 to host COP31 and neither has withdrawn, leading to an attention-sapping impasse that must be overcome at this year's COP30 meeting currently taking place in Belem, Brazil.

The annual COP – or Conference of the Parties - is the world's main forum for driving climate action. The host matters because they set the agenda and lead the diplomacy needed to reach global agreements.

The Turkish sources said Turkey and Australia explored a joint presidency model during talks on the margins of the U.N. General Assembly in September, including sharing hosting duties for high-level meetings and jointly steering negotiations.

Those conversations created "a basis of mutual understanding", they said, but the proposal had not advanced.

According to the sources, later exchanges showed differing views on how a co-presidency could function within U.N. procedures.

Australian Energy Minister Chris Bowen travelled to Brazil on Saturday for COP30, saying a decision would be taken there and that Australia had “overwhelming support” for its candidacy.

Canberra says it wants to co-host with Pacific island nations to highlight the climate threats they face. The Pacific Islands Forum is backing Australia’s bid.

Turkey, for its part, says its candidacy emphasises cooperation and inclusiveness and aims to put greater focus on financing for developing countries while showcasing its progress towards a 2053 net-zero emissions goal.

President Tayyip Erdogan expressed this view in recent correspondence with the Australian prime minister, the Turkish sources said, adding that Turkey still believed “flexible formulas” could be developed through continued consultations.

At the same time, the sources said Turkey was prepared to host the summit alone and assume the presidency if no agreement was reached.

The annual talks rotate through five regional groups, withCOP31's host needing to be unanimously agreed upon by the 28members of the "Western Europe and Others Group" bloc, which includes Australia and Turkey.

(Reporting by Tuvan Gumrukcu; Writing by Ece Toksabay; Editing by Alex Richardson)