Definition of upsurge | Bee Dictionary of English

n a sudden forceful flow
n a sudden or abrupt strong increase
an upsurge of emotion
an upsurge in violent crime

For years, environmentalists have warned that one of the first and most reliable signs of a climatological crash would be an upsurge in the most violent hurricanes, the kind that .
But a new upsurge of Israeli-Palestinian violence could once again prove to be an obstacle to the Bush administration's regional ambitions.
What's behind this week's upsurge of violence in Jerusalem and elsewhere on the West Bank? "It's a way for Arafat to send a message to the Americans that Al Aksa the mosque atop .

Real Estate Investor Rises to the Top by Using Technology
Caldwell Holdings Founder Josh Caldwell has seen an upsurge in business due to the company’s adoption of new technology. The new technology has made it easier for the company to outmaneuver the competition. (PRWeb June 13, 2013) Read the full story at http://www.prweb.com/releases/2013/6/prweb10797776.htm
June 13, 2013 - PRWeb
Office of the Spokesperson for the Secretary-General
The Secretary-General has been following with concern the unfolding political and security situation in Iraq, including the escalating political tensions and the appalling upsurge of violence that has killed a high number of civilians over the last two months.
June 11, 2013 - United Nations
Secretary-General Ban Ki-moon
The Secretary-General has been following with concern the unfolding political and security situation in Iraq, including the escalating political tensions and the appalling upsurge of violence that has killed a high number of civilians over the last two months.
June 11, 2013 - United Nations

Peter Mandelson in Channel News Asia
In response, EU Trade Commissioner Peter Mandelson told the European Parliament: "In face of a sudden upsurge in Chinese textiles, the Commission stands ready to use all of (the) instruments at its disposal."
George Casey in BBC News
Since January we have seen an upsurge in their support, particularly to the Shia extremist groups,Gen Casey said.