World Video | Defence | Foreign Affairs | Natural Events | Trade | NZ in World News | NZ National News Video | NZ Regional News | Search

 


La Niña Weather Likely To Last For Months

La Niña Weather, With Possible Floods And Droughts, Likely To Last For Months – UN

New York, Oct 11 2010 5:10PM

The La Niña weather pattern is likely to continue and may strengthen over the next four to six months, potentially bringing abnormal conditions to widely separate areas of the world, from floods to droughts to below or above normal temperatures, the United Nations weather agency "http://www.wmo.int/pages/mediacentre/press_releases/pr_900_en.html"reported today.

La Niña, characterized by unusually cool ocean temperatures in the central and eastern tropical Pacific, is the opposite of El Niño, characterized by unusually warm ocean temperatures, and both events can last for 12 months or more, disrupting normal tropical rainfall atmospheric circulation, with widespread impacts on climate in many parts of the world.

But although the current La Niña has similarities to past events, its local impacts may differ from those observed in the past, the World Meteorological Organization ("http://www.wmo.int/pages/index_en.html"WMO) warned in its latest update, stressing that for managing climate-related risks, it is important to consider both prevailing La Niña conditions and other factors with potential influence on the local climate.

Generally with La Niña, rainfall increases across the western equatorial Pacific, Indonesia and the Philippines and is nearly absent across the eastern equatorial Pacific. Wetter-than-normal conditions tend to prevail during December-February over northern South America and southern Africa, and during June-August over south-eastern Australia.

Drier-than-normal conditions are generally observed along coastal Ecuador, north-western Peru and equatorial eastern Africa during December-February, and over southern Brazil and central Argentina during June-August.

La Niña also contributes to large-scale temperature anomalies worldwide, with most affected regions experiencing abnormally cool conditions. Below-normal temperatures occur during December-February in south-eastern Africa, Japan, southern Alaska, west and central Canada, and south-eastern Brazil, and during June-August in India, south-eastern Asia, the west coast of South America, the Gulf of Guinea, northern South America and portions of Central America.

Warmer-than-normal conditions occur during December-February along the Gulf coast of the United States.

“Almost all forecast models predict continuation and possible further strengthening of this La Niña episode for the next 4 to 6 months, taking the event well into the first quarter of 2011,” WMO said.

This is because of the strong interaction between the oceanic and atmospheric aspects of the current event and the large area of below-average subsurface temperatures.

The current La Niña developed quickly in June and July 2010, following the dissipation of the 2009/2010 El Niño in April. Since August, the event has been moderate to strong.

ENDS

© Scoop Media

 
 
 
 
 
World Headlines

 

Support Needed For Olive Farmers In Palestinian Territory

Olive trees in the Palestinian town of Ni'lin in 2008 were very close to expanding Israeli settlements. Photo: IRIN/Shabtai Gold More>>

ALSO:

Use Of Drones In Law Enforcement May Violate Human Rights

22 October 2014 – The increasing use of armed drones within domestic law enforcement risks depersonalizing the use of force and infringing upon the rights of individual citizens, a United Nations independent human rights expert warned today. More>>

Gaza: Pledges For Aid, Reconstruction Must Be Honoured

Secretary-General Ban Ki-moon (left) addresses the Security Council meeting on the situation in the Middle East, including the Palestinian question. Security Council President for the month of October, María Cristina Perceval of Argentina, is at ... More>>

Ebola: UN Prepares For Arrival Of Trial Vaccines

In early October 2014, with the help of the US Navy, a new mobile laboratory opened at Island Clinic, one of the WHO-supported Ebola Treatment Units (ETU) in Monrovia, Liberia. Photo: WHO/R. Sørenson More>>



Palestine: Human Rights Defender Abdallah Abu Rahmah Found Guilty

Human Rights Defender Abdallah Abu Rahma was found guilty by an Israeli military court of “disturbing a soldier”. More>>

NCRI: Iran: 13 Executions In One Day

The henchmen of the clerical regime hanged 13 prisoners on Sunday October 19, 2014 in Ghezel-Hessar Karaj Prison, Tabriz Central Prison and Rasht Central Prison. More>>

MSF: Ebola Crisis Update - 16th October 2014

16 October 2014 Cases Deaths Guinea 1,472 843 Liberia 4,249 2,458 Nigeria 20 8 Sierra Leone 3,252 1,183 Senegal 1 0 Total 8,994 4,492 WHO Figures - Data are based on official information reported by Ministries of Health. These numbers are subject to change ... More>>

ALSO:

Detroit: City-Backed Water Shut-Offs Contrary To Human Rights

20 October 2014 – The city of Detroit must restore access to water for its citizens who remain unable to pay their bills, two United Nations experts urged today, adding that a failure to do so would be a violation of the most basic human rights of those ... More>>

ALSO:


Get More From Scoop

 
 
 
 
 
World
Search Scoop  
 
 
Powered by Vodafone
NZ independent news