The Climate Commission has been abolished and work has begun on scrapping the Climate Change Authority.
Federal Environment Minister Greg Hunt signed a departmental brief on Thursday to close the authority, following Wednesday's swearing in of the new Liberal-National government in Canberra.
The authority was set up by the former Labor government to provide advice on emissions targets.
The move will require consultation with the authority and legislation to be passed by the parliament, which is due to return in late October or early November.
A CCA spokeswoman said the authority understood it was the government's position to abolish it through repeal legislation.
"At this time the authority has received no further information from the government," the spokeswoman told AAP.
But Mr Hunt has immediately closed the Climate Commission, an advisory body set up by Labor to increase public awareness and provide information on climate change science.
Mr Hunt spoke to commission head Tim Flannery on Thursday to inform him of the decision and thank the commission for its work, the spokeswoman said.
The commission's work will be taken over by the environment department, to save the budget $580,000 in this financial year and $1.6 million a year in running costs.