“Former Vice President Gore does not intend to seek or accept any formal position in government,” Gore spokeswoman Kalee Kreider said. “He feels very strong right now that the best thing for him to do is to build support for the bold changes that we have to make to solve the climate crisis.”

Mr. Obama foreshadowed the new post on the campaign trail in April when he told a voter that Mr. Gore would be offered a special Cabinet post overseeing climate change.

“Al Gore will be at the table and play a central part in us figuring out how we solve this problem,” Mr. Obama said.