Martes, Marso 6, 2012

Australian floods because of La Nina..

A meteorological event that brings devastating floods either or, in case of its counterpart of El Nino, searing drought - Australia is out of his grasp of the strongest La Nina weather pattern emerging on record.

According to Australian Bureau of Meteorology, the weather patterns, dramatic flooding in southern Queensland introduced a year ago - on one of the most intense on record - is waning, but the ocean in the entire East Coast is still warm enough to high-pressure system dump months of rain in a matter of a few days lead."It was a very slow-moving trough over the interior of Australia, which stretched from the far north-west through the Northern Territory and South including New South Wales and Victoria," said Jenny Sturrock, acting senior meteorologist at the National Meteorological Center."If it meets all the beautiful warm moisture from the Coral and Tasman Seas, we have several days of heavy rain brought flooding to get," she said."This type of broad scale patterns are more conducive to rain, but it is exacerbated by short-term meteorological patterns as well."The scientists blame for the recent La Nina floods in Australia and the Philippines.The weather conditions are part of a natural cycle called the El Nino Southern Oscillation (ENSO) and occurs when the cold water is on the west coast of South America continent.Drawn by the strong easterly wind, the cold water surges westward across the Pacific, creating a "cold tongue", which pushes the warm water and a resulting higher pressure system ahead of him. The resulting period of the system - full of warm, moist air - heavy rain typically dumps when it makes landfall.His opposite effect, El Nino, is typically marked by wetter weather over South America. Argentina is currently in the grip of drought.La Nina occurs halfway between a number of years and a decade and usually takes a year or two.The extent to which global warming has contributed to the intensity of the weather, we still do not know, a record of events that grows just 60 years. However, the board said pattern is similar in intensity to the La Nina floods in 1939 and 1950.Long-term weather patterns across Australia is notoriously difficult to forecast meteorologists and collect oral evidence from Aboriginal to get a handle on the cycle time of the continent to get.The Bureau of Meteorology weather indigenous knowledge project aims to develop a weather map of Australia on knowledge of the weather conditions of the local community.Under this system, a surprisingly complex mosaic pattern of weather maps. For example, the study that the original inhabitants of the Sydney area have been recognized by six different seasons, has been instead of four in the region by its white settlers.

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