News tagged with el nino
Global warming may dent El Nino's protective shield from Atlantic hurricanes, increase droughts
(PhysOrg.com) -- El Niño, the periodic eastern Pacific phenomenon credited with shielding the United States and Caribbean from severe hurricane seasons, may be overshadowed by its brother in the central Pacific ...
Space & Earth / Earth Sciences
Sep 23, 2009 |
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Harbingers of increased Atlantic hurricane activity identified
Reconstructions of past hurricane activity in the Atlantic Ocean indicate that the most active hurricane period in the past was during the "Medieval Climate Anomaly" about a thousand years ago when climate ...
Space & Earth / Earth Sciences
Aug 12, 2009 |
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Sea change can forecast South American wildfires
Tiny temperature changes on the Atlantic and Pacific oceans provide an excellent way to forecast wildfires in South American rainforests, according to UC Irvine and other researchers funded by NASA.
Space & Earth / Earth Sciences
Nov 10, 2011 |
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Antarctic fur seals breed where they were born
Scientists have discovered that female Antarctic fur seals have an uncanny ability to return to within a body length of where they were born when it's time to breed.
Oct 28, 2011 |
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Climate cycles are driving wars, says study
In the first study of its kind, researchers have linked a natural global climate cycle to periodic increases in warfare. The arrival of El Niño, which every three to seven years boosts temperatures and ...
Space & Earth / Earth Sciences
Aug 24, 2011 |
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Tree rings open door on 1100 years of El Nino
(PhysOrg.com) -- El Nino and La Nina, the periodic shifts in Pacific Ocean temperatures, affect weather around the globe, and many scientists have speculated that a warming planet will make those fluctuations ...
Space & Earth / Earth Sciences
May 27, 2011 |
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Ancient El Nino clue to future floods
(PhysOrg.com) -- Dramatic climate swings behind both last year's Pakistan flooding and this year’s Queensland floods in Australia are likely to continue as the world gets warmer, scientists predict.
Space & Earth / Earth Sciences
May 26, 2011 |
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Tree rings tell a 1,100-year history of El Nino
El Niño and its partner La Niña, the warm and cold phases in the eastern half of the tropical Pacific, play havoc with climate worldwide. Predicting El Niño events more than several months ahead ...
Space & Earth / Earth Sciences
May 06, 2011 |
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Climate phenomenon La Nina to blame for global extreme weather events
(PhysOrg.com) -- Recent extreme weather events as far as Australia and Africa are being fueled by a climate phenomenon known as La Nina -- or "the girl" in Spanish. La Nina has also played a minor role in ...
Space & Earth / Earth Sciences
Feb 07, 2011 |
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Variable southeast summer rainfall linked to climate change
A doubling of abnormally wet or dry summer weather in the southeastern United States in recent decades has come from an intensification of the summertime North Atlantic Subtropical High (NASH), or "Bermuda High."
Space & Earth / Earth Sciences
Oct 27, 2010 |
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Climate change may alter natural climate cycles of Pacific
While it's still hotly debated among scientists whether climate change causes a shift from the traditional form of El Nino to one known as El Nino Modoki, online in the journal Nature Geoscience, scientists now say that E ...
Space & Earth / Earth Sciences
Oct 17, 2010 |
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La Nina strengthens: WMO
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.
Space & Earth / Earth Sciences
Oct 11, 2010 |
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Ocean cooling contributed to mid-20th century global warming hiatus
The hiatus of global warming in the Northern Hemisphere during the mid-20th century may have been due to an abrupt cooling event centered over the North Atlantic around 1970, rather than the cooling effects ...
Space & Earth / Earth Sciences
Sep 22, 2010 |
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Pacific chills with growing La Nina
(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 ...
Space & Earth / Earth Sciences
Sep 16, 2010 |
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Scientists forecast nine more Atlantic hurricanes, five big ones
The forecast for the 2010 Atlantic hurricane season calls for nine more hurricanes by November, including five major ones with winds topping 178 kilometers (110 miles) per hour, a Colorado State University ...
Space & Earth / Earth Sciences
Aug 05, 2010 |
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El Niño-Southern Oscillation
El Niño-Southern Oscillation (abbrieviated as ENSO and commonly called simply El Niño), is an intensification of monthly or seasonal fluctuations in the air pressure difference between Tahiti and Darwin, Australia caused by warming of surface waters of the tropical Eastern Pacific Ocean that occurs every three to eight years. The name is from the Spanish for "the little boy", refers to the Christ child, because the phenomenon is usually noticed around Christmas in the Pacific near South America. A period of cooling in the tropical Pacific is the opposite extreme in the natural ENSO cycle and is called La Niña.
The mechanisms that sustain the El Niño - La Nina cycle remain a matter of research, but El Nino is associated with disruption of Pacific trade winds and a stronger than usual so-called Madden-Julian oscillation, which is the frequent and regularly occurring eastward progression of tropical rainfall over the Pacific.
El Niño is associated with floods, droughts and is linked to other weather disturbances in many locations around the world. El Niño's effects in the Atlantic Ocean lag behind those in the Pacific by 12 to 18 months. Developing countries dependent upon agricultural and fishing are especially affected. But El Niño's effects on weather vary with each event, and ENSO's intensity or frequency may change as a result of global warming. Research suggests that treating ocean warming which occurs in the eastern tropical Pacific separately from that of the central tropical Pacific may help explain some of these variations.
For more information about El Niño-Southern Oscillation, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
