Changes in El Niño and La Niña teleconnections over North Pacific-America in the global warming simulations

Jong Seong Kug, Soon-Il An, Yoo Geun Ham, In Sik Kang

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

The change in the teleconnections of both El Niño and La Niña over the North Pacific and American regions due to a future greenhouse warming has been analyzed herein by means of diagnostics of the Intergovernmental Panel on Climate Change-Fourth Assessment Report (IPCC-AR4) coupled general circulation models (CGCMs). Among the IPCC-AR4 CGCM simulations, the composites of the eight-member multimodel ensemble are analyzed. In most CGCMs, the tropical Pacific warming due to the increase of CO2 concentration in the atmosphere promotes the main convection centers in the equatorial Pacific associated with both El Niño and La Niña to the east. The eastward shift of the convection center causes a systematic eastward shift of not only El Niño but also La Niña teleconnection patterns over the North Pacific and America, which is demonstrated in the composite maps of 500 hPa circulation, surface temperature, and the precipitation against El Niño and La Niña, as observed in a comparison between the pre-industrial and CO2 doubling experiments. Thus, a systematic eastward migration of convection centers in the tropical Pacific associated with both El Niño and La Niña due to a future global warming commonly causes the eastward shift of the atmospheric teleconnection patterns over the Northern Hemisphere.

Original languageEnglish
Pages (from-to)275-282
Number of pages8
JournalTheoretical and Applied Climatology
Volume100
Issue number3
DOIs
Publication statusPublished - 2010 Jan 1

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teleconnection
general circulation model
global warming
convection
warming
simulation
Intergovernmental Panel on Climate Change
Northern Hemisphere
surface temperature
atmosphere
experiment

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

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Changes in El Niño and La Niña teleconnections over North Pacific-America in the global warming simulations. / Kug, Jong Seong; An, Soon-Il; Ham, Yoo Geun; Kang, In Sik.

In: Theoretical and Applied Climatology, Vol. 100, No. 3, 01.01.2010, p. 275-282.

Research output: Contribution to journalArticle

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