"El Nino Was Unusually Active in Possible Link to Climate Change"
"The El Nino weather pattern that can bring drought to Australia and rain to South America was 'unusually active' at the end of the 20th century, possibly due to climate change, a University of Hawaii study found."
"Researchers studied 2,222 tree-ring records as proxies for temperature and rainfall over the past 700 years, the university wrote in an online statement dated yesterday. The records indicate the El Nino-Southern Oscillation weather phenomenon has been increasingly active in recent decades relative to the past seven centuries.