Qld senator crosses floor on Paris target

Queensland Nationals senator Barry O'Sullivan has crossed the floor to vote in support of Australia pulling out of international emissions reduction targets.

Nationals Senator Barry O'Sullivan, left, votes against the government on the Paris climate accord. (AAP)

A Queensland Nationals senator has broken ranks with the government, voting with a small group of crossbenchers in support of withdrawing from the Paris climate agreement.

Barry O'Sullivan joined forces with a handful of conservative independent senators on Tuesday to back Cory Bernardi's motion calling on Australia to walk away from its international emissions commitments.

Senator O'Sullivan is set to leave parliament at the next election after being relegated to an unwinnable position on the LNP's Queensland upper house ticket.