Australian meteorologists call an end to La Nina
Sydney (AFP) May 25, 2011
Australian meteorologists on Wednesday declared La Nina, the disruptive weather pattern behind floods and cyclones that brought death and destruction this year, to have ended.
The weather phenomenon, which began in earnest in December, was blamed for torrential rain and ferocious storms in Queensland state that wiped out crops, flooded mining operations and claimed at least 30 lives.
It also brought severe weather to Southeast Asia and South America over late 2010 and early 2011.
Dr Andrew Watkins, head of the Australian Bureau of Meteorology's Climate Prediction Services, said rapid changes in Pacific climate patterns over the past few weeks have finally brought the event to a close.
"This most recent La Nina will go down in the record books as one of the strongest in living memory," he said.
"It's been nearly 40 years (1975-76) since Australians have witnessed a La Nina event of this intensity."
La Nina is characterised by unusually cool ocean surface temperatures in the central and eastern tropical Pacific.
It leads to increased rainfall across the western equatorial Pacific, northern South America and southern Africa over December to February.
At the same time, drier than normal conditions are observed along coastal Ecuador, northwestern Peru and equatorial eastern Africa.
"The outlook for (Southern Hemisphere) winter is for conditions to stay neutral," Watkins said.
"Over the coming months changes in the Pacific Ocean will give a clearer picture of the likely conditions for the coming spring and summer, but at this stage it's a waiting game."
El Nino is the opposite condition of La Nina. It is characterised by unusually warm ocean temperatures in the central and eastern equatorial Pacific.
Share This Article With Planet Earth
Water News - Science, Technology and Politics
Geneva (AFP) May 23, 2011
La Nina, the disruptive weather pattern behind floods and droughts, is easing and there are no signs suggesting a resurgence in the coming months, the UN weather agency said Monday. "The La Nina episode, which caused disastrously wet conditions in certain regions and drought in others, is coming to an end," the World Meterological Organization said in a statement. The weather pattern, bl ... read more
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement|