US wind power capacity soared by almost 40% last year but job growth stalled as uncertainty about renewable energy slowed manufacturing, an industry group said.

The combined power generating capacity of new US wind turbines installed last year hit more than 9,900MW, up from a gain of over 8,400MW in the previous year.

According to the report by the American Wind Energy Association (AWEA) total capacity hit more than 35,000MW.

But the total number of US jobs associated with wind energy, stalled at 85,000 as the recession took a toll on manufacturing. In 2008, job growth surged as the sector added 35,000 positions, reports Reuters.

The AWEA wants Congress to pass national mandates for generating renewable power, which are expected to be included in a compromise climate bill to be considered by the Senate this year, reports Reuters.