WASHINGTON, Jan. 14 -- The global economy is estimated to expand at 3.2 percent this year from 2.4 percent in 2013, with growth picking up in developing countries and high-income economies turning around the corner, the World Bank said Tuesday.

But growth prospects remain vulnerable to U.S.tapering, the global lender said in its semi-annual Global Economic Prospects report.

The firming of growth in developing countries is being bolstered by an acceleration in high-income countries and continued strong growth in China, it said.

However, global growth outlook will be sensitive to headwinds from rising global interest rates and potential volatility in capital flows, as the U.S. Federal Reserve begins withdrawing its massive monetary stimulus, the report noted.

Growth in developing countries will pick up from 4.8 percent in 2013 to a slower-than-expected 5.3 percent this year, reflecting a cooling off of the unsustainable turbo-charged pre-crisis growth.

For high-income economies, the drag on growth from fiscal consolidation and policy uncertainty will ease, helping to boost economic growth from 1.3 percent in 2013 to 2.2 percent this year.

Among them, the recovery is most advanced in the United States, as it is projected to grow by 2.8 percent this year after expanding for ten quarters.

The Euro Area, after two years of contraction, is projected to grow by 1.1 percent this year board.