La Nina strengthens: WMO

October 11, 2010
NASA image of the planet Earth. 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.

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.

World Meteorological Organisation climate services chief Rupa Kumar Kolli said a "moderate to strong" La Nina, which appeared in July, was now well estabished.

Kumar Kolli told journalists that forecasts showed "rather a strengthening of this La Nina episode for the next four to six months."

La Nina is the opposition condition of the El Nino weather pattern which subsided in June after being blamed for an exceptionally snowbound winter in North America and Europe.

La Nina is characterised by unusually cool in the eastern equatorial Pacific and has been associated with strong rainfall in Asia and Australia, bitter cold snaps in North America, as well as drought in South America.

The WMO expert warned regions typically affected by La Nina to expect "enhanced " into the first quarter of 2011, predicting a "more active than normal" monsoon.

He also associated it with a more active Atlantic hurricane season.

Nonetheless, the WMO said that despite the similarity so far with previous La Nina episodes, notably with major flooding in South Asia since July, the impact of the latest one on local climates may differ from the past.

and , the complex interaction between shifting and the atmosphere, and the broader impact beyond the Pacific remain ill understood by WMO scientists, who are also reluctant to establish clear links with climate change.

Ghassem Asrar, head of research at the WMO, noted that the number of monsoons with more intense rainfall had increased over the past 50 years.

Explore further: Study: La Niña might create severe weather

Related Stories

Study: La Niña might create severe weather

April 17, 2006

U.S. scientists say La Niña-controlled weather patterns have the potential to produce more severe storms, as those recently seen in the Midwest and South.

U.N. meteorologist predicts cooler summer

April 4, 2008

A U.N. meteorologist says the cooling effect of the La Nina current in the Pacific will likely mean slightly lower temperatures across the world this year.

Pacific chills with growing La Nina

September 16, 2010

(PhysOrg.com) -- The tropical Pacific Ocean has transitioned from last winter's El Nino conditions to a cool La Nina, as shown by new data about sea surface heights, collected by the U.S-French Ocean Surface Topography Mission ...

Recommended for you

A cataclysmic event of a certain age

July 27, 2015

At the end of the Pleistocene period, approximately 12,800 years ago—give or take a few centuries—a cosmic impact triggered an abrupt cooling episode that earth scientists refer to as the Younger Dryas.

'Carbon sink' detected underneath world's deserts

July 28, 2015

The world's deserts may be storing some of the climate-changing carbon dioxide emitted by human activities, a new study suggests. Massive aquifers underneath deserts could hold more carbon than all the plants on land, according ...

0 comments

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.