El Nino may be overshadowed by its brother in central Pacific due to global warmingSeptember 24th, 2009 - 2:02 pm ICT by ANI
Washington, September 24 (ANI): In a new research, scientists have determined that El Nino, the periodic eastern Pacific phenomenon credited with shielding the US and Caribbean from severe hurricane seasons, may be overshadowed by its brother in the central Pacific due to global warming.
“There are two El Ninos, or flavors of El Nino,” said Ben Kirtman, co-author of the study and professor of meteorology and physical oceanography at the University of Miami’s Rosentstiel School of Marine and Atmospheric Science.
“In addition to the eastern Pacific El Nino which we know and love, a second El Nino in the central Pacific is on the increase,” he added.
El Nino is a recurring warm water current along the equator in the Pacific Ocean that affects weather circulation patterns in the tropics.
The eastern El Nino increases wind sheer in the Atlantic that may hamper the development of major hurricanes there.
The central Pacific El Nino, near the International Dateline, has been blamed for worsening drought conditions in Australia and India as well as minimizing the effects of its beneficial brother to the east.
Led by Sang-Wook Yeh of the Korea Ocean Research and Development Institute, a team of scientists applied Pacific Ocean sea surface temperature data from the past 150 years to 11 global warming models developed by the Intergovernmental Panel on Climate Change.
Eight of the models showed that global warming conditions will increase the incidence of the central Pacific El Nino.
Over the past 20 years, according to the data, the frequency of an El Nino event in the central Pacific has increased from one out of every five to half of all El Nino occurrences.
“The results described in this paper indicate that the global impacts of El Nino may significantly change as the climate warms,” said Yeh.
An increase in central Pacific El Nino events may reduce the hurricane-shielding effects of the eastern Pacific event.
“Currently, we are in the middle of a developing eastern Pacific El Nino event, which is part of why we’re experiencing such a mild hurricane season in the Atlantic,” said Kirtman.
“We also anticipate the southern United States to have a fairly wet winter, and the northeast may be dry and warm,” he added.
Kirtman expects the current El Nino event to end next spring, perhaps followed by a La Nina, which he expects may bode for a more intense Atlantic hurricane season in 2010. (ANI)
- Global warming likely to intensify tropical rainfall - Sep 18, 2012
- Tropical Depression Seven forms in the eastern Atlantic, set to become hurricane - Aug 25, 2010
- New form of El Nino may increase chances of hurricanes making landfall - Jul 03, 2009
- Meteorologists say that 'La Nina' is over - Jun 10, 2011
- NOAA predicts active Hurricane Season in US - May 28, 2010
- Warming could unleash more violent storms, says study - Jul 11, 2012
- WMO: Moderate to strong La Nina to continue into 2011 - Oct 11, 2010
- NOAA predicts busy Atlantic hurricane season - May 27, 2010
- Tropical Storm Eugene forms in the Pacific, no threat to land - Jul 31, 2011
- Top 10 global weather events in 2010 - Jan 14, 2011
- 2010 tied for warmest year on record - Jan 13, 2011
- Tropical Storm Aletta forms far off Mexico's Pacific coast, no threat - May 15, 2012
- Tropical depression forms in the far eastern Atlantic, may threaten the Caribbean - Aug 29, 2011
- Predictions Say That The Hurricane Season Of 2010 Will Be A Busy One - Apr 10, 2010
- New El Nino may lead to increased drought in India - Aug 03, 2009
Tags: , , , , , , , , , , , , , , , , , , ,