ENSO Transition Asymmetry: Internal and External Causes and Intermodel Diversity

Soon-Il An, Ji Won Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

El Niño is frequently followed by La Niña, but the opposite case rarely happens. Here we explore a mechanism for such an asymmetrical transition and its future changes. Internally, the asymmetrical response of upper ocean waves against surface wind stress anomaly exerts a primary cause of El Niño–Southern Oscillation (ENSO) transition asymmetry. Externally, the asymmetrical capacitor effects of both Indian and Atlantic Oceans play some roles in driving the ENSO transition asymmetry via the interbasin interactions. The historical runs of Coupled Model Intercomparison Project Phase 5 show that the intermodel transition asymmetry is significantly correlated with the intermodel asymmetry in ocean wave response to surface wind forcing but not with that in the interbasin interactions. In addition, the El Niño-to-La Niña transition tendency was weaker in moderate global warming scenario runs (Representative Concentration Pathway 4.5) while slightly enhanced in strong warming scenario runs (Representative Concentration Pathway 8.5). Similar changes also appeared in the asymmetrical response of ocean waves against the surface wind forcing.

Original languageEnglish
Pages (from-to)5095-5104
Number of pages10
JournalGeophysical Research Letters
Volume45
Issue number10
DOIs
Publication statusPublished - 2018 May 28

Fingerprint

ocean wave
asymmetry
oscillation
surface wind
oscillations
causes
wind forcing
oceans
upper ocean
wind stress
global warming
Atlantic Ocean
Indian Ocean
warming
surface waves
capacitors
anomaly
tendencies
interactions
anomalies

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

@article{30572992726648e0b7a7d99142915d17,
title = "ENSO Transition Asymmetry: Internal and External Causes and Intermodel Diversity",
abstract = "El Ni{\~n}o is frequently followed by La Ni{\~n}a, but the opposite case rarely happens. Here we explore a mechanism for such an asymmetrical transition and its future changes. Internally, the asymmetrical response of upper ocean waves against surface wind stress anomaly exerts a primary cause of El Ni{\~n}o–Southern Oscillation (ENSO) transition asymmetry. Externally, the asymmetrical capacitor effects of both Indian and Atlantic Oceans play some roles in driving the ENSO transition asymmetry via the interbasin interactions. The historical runs of Coupled Model Intercomparison Project Phase 5 show that the intermodel transition asymmetry is significantly correlated with the intermodel asymmetry in ocean wave response to surface wind forcing but not with that in the interbasin interactions. In addition, the El Ni{\~n}o-to-La Ni{\~n}a transition tendency was weaker in moderate global warming scenario runs (Representative Concentration Pathway 4.5) while slightly enhanced in strong warming scenario runs (Representative Concentration Pathway 8.5). Similar changes also appeared in the asymmetrical response of ocean waves against the surface wind forcing.",
author = "Soon-Il An and Kim, {Ji Won}",
year = "2018",
month = "5",
day = "28",
doi = "10.1029/2018GL078476",
language = "English",
volume = "45",
pages = "5095--5104",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "10",

}

ENSO Transition Asymmetry : Internal and External Causes and Intermodel Diversity. / An, Soon-Il; Kim, Ji Won.

In: Geophysical Research Letters, Vol. 45, No. 10, 28.05.2018, p. 5095-5104.

Research output: Contribution to journalArticle

TY - JOUR

T1 - ENSO Transition Asymmetry

T2 - Internal and External Causes and Intermodel Diversity

AU - An, Soon-Il

AU - Kim, Ji Won

PY - 2018/5/28

Y1 - 2018/5/28

N2 - El Niño is frequently followed by La Niña, but the opposite case rarely happens. Here we explore a mechanism for such an asymmetrical transition and its future changes. Internally, the asymmetrical response of upper ocean waves against surface wind stress anomaly exerts a primary cause of El Niño–Southern Oscillation (ENSO) transition asymmetry. Externally, the asymmetrical capacitor effects of both Indian and Atlantic Oceans play some roles in driving the ENSO transition asymmetry via the interbasin interactions. The historical runs of Coupled Model Intercomparison Project Phase 5 show that the intermodel transition asymmetry is significantly correlated with the intermodel asymmetry in ocean wave response to surface wind forcing but not with that in the interbasin interactions. In addition, the El Niño-to-La Niña transition tendency was weaker in moderate global warming scenario runs (Representative Concentration Pathway 4.5) while slightly enhanced in strong warming scenario runs (Representative Concentration Pathway 8.5). Similar changes also appeared in the asymmetrical response of ocean waves against the surface wind forcing.

AB - El Niño is frequently followed by La Niña, but the opposite case rarely happens. Here we explore a mechanism for such an asymmetrical transition and its future changes. Internally, the asymmetrical response of upper ocean waves against surface wind stress anomaly exerts a primary cause of El Niño–Southern Oscillation (ENSO) transition asymmetry. Externally, the asymmetrical capacitor effects of both Indian and Atlantic Oceans play some roles in driving the ENSO transition asymmetry via the interbasin interactions. The historical runs of Coupled Model Intercomparison Project Phase 5 show that the intermodel transition asymmetry is significantly correlated with the intermodel asymmetry in ocean wave response to surface wind forcing but not with that in the interbasin interactions. In addition, the El Niño-to-La Niña transition tendency was weaker in moderate global warming scenario runs (Representative Concentration Pathway 4.5) while slightly enhanced in strong warming scenario runs (Representative Concentration Pathway 8.5). Similar changes also appeared in the asymmetrical response of ocean waves against the surface wind forcing.

UR - http://www.scopus.com/inward/record.url?scp=85047773302&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85047773302&partnerID=8YFLogxK

U2 - 10.1029/2018GL078476

DO - 10.1029/2018GL078476

M3 - Article

AN - SCOPUS:85047773302

VL - 45

SP - 5095

EP - 5104

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 10

ER -