Australia's national interest is best served if the US remains in the Paris climate change agreement, a Senate hearing has been told.
President Donald Trump is set to announce the US position and whether it will pull out of the deal which almost 200 countries have signed and 147 have ratified.
"Australia's national interests are best served by US participation in the Paris agreement, consistent with our support for a collective global response to climate change," cabinet minister Michaelia Cash told a Senate estimates hearing on Wednesday.
Senator Cash took on notice questions about whether the issue had been raised by the foreign minister or prime minister in their talks with US counterparts.
Fiji Prime Minister Frank Bainimarama in early May asked Malcolm Turnbull, ahead of his visit to New York for talks with President Trump, to pass on a message about not abandoning the Paris deal.
Department of Foreign Affairs and Trade secretary Frances Adamson said she was not aware of specific conversations at ministerial level but said wide-ranging conversations have taken place with the US administration.
She insisted Australia's position would be known to the White House.
Ms Adamson said Australia's position was the more involved the better.
Former President Barack Obama signed up the US for a carbon emissions reduction target of 26-28 per cent, based on 2005 levels, by 2025.
