La Nina returns, but weaker impact seen: UN weather agency

Nov 17, 2011
A man cycles across a flooded street with a child in La Libertad, El Salvador in October 2011. The UN weather agency said on Thursday that La Nina, a phenomenon linked to flooding and drought, had re-emerged in the tropical Pacific since August but its impact is expected to be weaker this time.

The UN weather agency said on Thursday that La Nina, a phenomenon linked to flooding and drought, had re-emerged in the tropical Pacific since August but its impact is expected to be weaker this time.

"This La Nina is expected to persist through the end of this year and into early 2012, possibly strengthening to ," said the World Meteorological Organisation in a statement.

"However, it is likely to be considerably weaker than the recent episode that was linked to flooding and drought in different parts of the world."

La Nina is characterized by unusually cool in the central and eastern tropical Pacific.

It is the opposite of , which is marked by unusually warm ocean surface temperatures.

Both factor in the fluctuations of the world's climate.

In late 2008 La Nina was blamed for icy conditions that claimed dozens of lives across Europe.

The can also bring about strong rainfall in Indonesia, Malaysia and Australia, as well as drought in South America.

The current La Nina follows closely behind the moderate to strong one that started in September 2010 and ended with neutral conditions established in May this year, the WMO said.

"Historical precedents and the latest outputs from forecast models suggest that peak intensity of this La Nina will be reached in late 2011 or early 2012, and that it is very unlikely to reach conditions as strong as those of the 2010-11 La Nina event," the statement said.

Explore further: Gulf health 5 years after BP spill: Resilient yet scarred

Related Stories

La Nina outlook is easing says UN weather agency

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 on Monday.

La Nina strengthens: WMO

Oct 11, 2010

The disruptive La Nina weather pattern in the Pacific basin should strengthen over the next four to six months, heralding stronger monsoons and more hurricanes, the UN weather agency said on Monday.

La Nina returns, bringing more severe weather: US

Sep 08, 2011

The weather phenomenon known as La Nina is returning for another season, likely bringing more drought, heavy rains and severe weather to some parts of the world, US forecasters said Thursday.

Recommended for you

China's struggle for water security

13 hours ago

Way back in 1999, before he became China's prime minister, Wen Jiabao warned that water scarcity posed one of the greatest threats to the "survival of the nation".

Canada revises upward CO2 emission data since 1990

14 hours ago

Canada revised its greenhouse gas emission data from 1990 to 2013 in a report Friday, showing it had higher carbon dioxide discharges each year, and a doubling of emissions from its oil sands.

Climate censorship gains steam in red states

Apr 17, 2015

While plenty of people found humor in the recent news that officials in Florida and Wisconsin are censoring state workers' ability to talk about, much less work on, climate change, other states are not necessarily laughing. ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.