US President Barack Obama (R) and Brazilian President Dilma Rousseff unviel joint renewable energy targets after a meeting at the White House, June 30, 2015

The United States and Brazil on Tuesday unveiled ambitious joint renewable energy targets, hoping to present a collective front ahead of crunch global climate talks later this year.

Putting a spying row behind them, Presidents Barack Obama and Dilma Rousseff agreed to create 20 percent of domestic electricity from non-hydropower by 2030 and vowed to fight for an "ambitious" global climate accord.

"This is a big deal," Obama's top climate aide Brian Deese said. "For the United States, it will require tripling the amount of on our electricity grid."

"For Brazil, it will require more than doubling."

The target comes ahead of UN-sponsored climate talks in Paris in late November and December.

Ahead of the meeting, countries are arm-wrestling over global and national emissions targets.

Nations are being asked to set their own reduction targets with an overall aim of limiting global temperature increases to two degrees Celsius.

Obama has pledged to reduce US emissions by 26-28 percent below 2005 levels by 2025 and was hoping for a similar concrete commitment from Brazil.

Rousseff did not come to Washington with a firm figure, but both countries "committed to reaching an ambitious agreement" at the Paris talks.

In a statement, they pledged "strong post-2020 contributions consistent with their determination to show global leadership."