LIMA, Peru — In a sign of the importance that the Obama administration has placed on the outcome of United Nations climate change negotiations taking place here this week, Secretary of State John Kerry will arrive on Thursday to strongly urge negotiators to reach a deal, according to sources familiar with Mr. Kerry’s plans but unauthorized to speak to the media. Typically, the secretary of state would not join diplomatic negotiations at this level, but Mr. Kerry has made climate change a priority of his tenure.

He spent months helping broker an agreement, announced in November, that commits the United States and China to cutting carbon emissions. That announcement by the world’s two biggest polluters is viewed as a breakthrough with the potential to clear the way for a truly global climate deal, in which every country would commit to cutting fossil-fuel emissions.

Negotiators are hoping to produce a draft of such a deal by the end of the conference on Friday or Saturday, with the expectation that world leaders will sign on to the final plan next year in Paris. President Obama, using his executive authority, has already pushed through a set of climate change regulations in the United States.

Despite November’s announcement, many obstacles remain before a global agreement can be produced. Developing nations vulnerable to climate change are demanding that industrialized nations commit billions of dollars in public funding to help them adapt to the ravages of global warming.