Daily Telegraph: THE causes of the longest and most devastating droughts to scorch NSW over the past 120 years have been discovered, Sydney scientists say. An unpredictable cycle of warm or cool water in the Indian Ocean off Western Australia is the culprit when droughts last for many years. Researchers Dr Caroline Ummenhofer and Professor Matthew England of the University of NSW’s Climate Change Research Centre say they have revealed for the first time the consequences of a phenomenon known as …