Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Two Leading ENSO Modes and El Niño Types in the Zebiak–Cane Model

Journal Article · · Journal of Climate
 [1];  [2]
  1. Chinese Academy of Sciences, Qingdao (China); DOE/OSTI
  2. Univ. of Hawaii, Honolulu, HI (United States)

Modern instrumental records reveal that El Niño events differ in their spatial patterns and temporal evolutions. Attempts have been made to categorize them roughly into two main types: eastern Pacific (EP; or cold tongue) and central Pacific (CP; or warm pool) El Niño events. In this study, a modified version of the Zebiak–Cane (MZC) coupled model is used to examine the dynamics of these two types of El Niño events. Linear eigenanalysis of the model is conducted to show that there are two leading El Niño–Southern Oscillation (ENSO) modes with their SST patterns resembling those of two types of El Niño. Thus, they are referred to as the EP and CP ENSO modes. These two modes are sensitive to changes in the mean states. The heat budget analyses demonstrate that the EP (CP) mode is dominated by thermocline (zonal advective) feedback. Therefore, the weak (strong) mean wind stress and deep (shallow) mean thermocline prefer the EP (CP) ENSO mode because of the relative dominance of thermocline (zonal advective) feedback under such a mean state. Consistent with the linear stability analysis, the occurrence ratio of CP/EP El Niño events in the nonlinear simulations generally increases toward the regime where the linear CP ENSO mode has relatively higher growth rate. These analyses suggest that the coexistence of two leading ENSO modes is responsible for two types of El Niño simulated in the MZC model. This model result may provide a plausible scenario for the observed ENSO diversity.

Research Organization:
Univ. of Hawaii, Honolulu, HI (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0005110
OSTI ID:
1541844
Journal Information:
Journal of Climate, Journal Name: Journal of Climate Journal Issue: 5 Vol. 31; ISSN 0894-8755
Publisher:
American Meteorological SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (62)

Effects of westerly wind bursts on El Niño: A new perspective: Effects of Westerly Wind Bursts on ENSO journal May 2014
Optimal precursors of different types of ENSO events: Optimal Precursors of ENSO Events journal November 2015
Can we distinguish canonical El Niño from Modoki? journal October 2013
ENSO diversity in the NCAR CCSM4 climate model: Enso Diversity in the NCAR CCSM4 journal October 2013
Some simple solutions for heat-induced tropical circulation journal July 1980
Tropical Pacific impacts of convective momentum transport in the SNU coupled GCM journal December 2007
Linkages between the North Pacific Oscillation and central tropical Pacific SSTs at low frequencies journal December 2011
A new paradigm for the predominance of standing Central Pacific Warming after the late 1990s journal July 2012
Simulations of two types of El Niño events by an optimal forcing vector approach journal November 2013
The impact of basic state on quasi-biennial periodicity of central Pacific ENSO over the past decade journal April 2014
El Niño/Southern Oscillation and the annual cycle: subharmonic frequency-locking and aperiodicity journal November 1996
Spatial and temporal structure of Tropical Pacific interannual variability in 20th century coupled simulations journal January 2006
An eigen analysis of the interdecadal changes in the structure and frequency of ENSO mode journal August 2000
On the definition of El Niño and associated seasonal average U.S. weather anomalies journal January 2005
A coupled-stability index for ENSO journal January 2006
Ensemble-mean dynamics of the ENSO recharge oscillator under state-dependent stochastic forcing journal January 2007
El Niño Modoki and its possible teleconnection journal January 2007
Impact of a modified convective scheme on the Madden-Julian Oscillation and El Niño-Southern Oscillation in a coupled climate model: MJO AND ENSO SIMULATED BY A COUPLED GCM journal August 2007
El Niño variability in simple ocean data assimilation (SODA), 1871–2008 journal January 2011
Natural variation in ENSO flavors: NATURAL VARIATION IN ENSO FLAVORS journal July 2011
Are there two types of La Nina?: TWO TYPES OF LA NINA journal August 2011
Significant changes to ENSO strength and impacts in the twenty-first century: Results from CMIP5: CMIP5 ENSO CHANGES journal September 2012
Weakening of tropical Pacific atmospheric circulation due to anthropogenic forcing journal May 2006
El Niño in a changing climate journal September 2009
Late-twentieth-century emergence of the El Niño propagation asymmetry and future projections journal November 2013
Strong influence of westerly wind bursts on El Niño diversity journal April 2015
The impact of global warming on the tropical Pacific Ocean and El Niño journal May 2010
Simple dynamical models capturing the key features of the Central Pacific El Niño journal October 2016
Simple stochastic dynamical models capturing the statistical diversity of El Niño Southern Oscillation journal January 2017
Tropical Ocean-Atmosphere Interaction, the Pacific Cold Tongue, and the El Nino-Southern Oscillation journal October 1996
Is El Nino Changing? journal June 2000
Oceanic Rossby Wave Dynamics and the ENSO Period in a Coupled Model journal July 1997
A Linear Stochastic Dynamical Model of ENSO. Part I: Model Development journal August 2000
A Stability Analysis of Tropical Ocean–Atmosphere Interactions: Bridging Measurements and Theory for El Niño journal July 2001
Collective Role of Thermocline and Zonal Advective Feedbacks in the ENSO Mode* journal August 2001
An Improved In Situ and Satellite SST Analysis for Climate journal July 2002
A Near-Annual Pacific Ocean Basin Mode journal June 2004
Dynamics and Thermodynamics of a Warming Event in a Coupled Tropical Atmosphere–Ocean Model journal October 1988
Modes of Interannual Tropical Ocean–Atmosphere Interaction—a Unified View. Part I: Numerical Results journal November 1993
Modes of Interannual Tropical Ocean–Atmosphere Interaction—a Unified View. Part III: Analytical Results in Fully Coupled Cases journal November 1993
An Equatorial Ocean Recharge Paradigm for ENSO. Part I: Conceptual Model journal April 1997
An Equatorial Ocean Recharge Paradigm for ENSO. Part II: A Stripped-Down Coupled Model journal April 1997
A Model El Niñ–Southern Oscillation journal October 1987
Coexistence of Equatorial Coupled Modes of ENSO journal June 2008
The Impact of Convection on ENSO: From a Delayed Oscillator to a Series of Events journal November 2008
Contrasting Eastern-Pacific and Central-Pacific Types of ENSO journal February 2009
Two Types of El Niño Events: Cold Tongue El Niño and Warm Pool El Niño journal March 2009
Atmosphere Feedbacks during ENSO in a Coupled GCM with a Modified Atmospheric Convection Scheme journal November 2009
Climate Response of the Equatorial Pacific to Global Warming journal September 2009
Warm Pool and Cold Tongue El Niño Events as Simulated by the GFDL 2.1 Coupled GCM journal March 2010
Asymmetry in the Duration of El Niño and La Niña journal November 2010
Pattern Classification of Typhoon Tracks Using the Fuzzy c-Means Clustering Method journal January 2011
NCEP–DOE AMIP-II Reanalysis (R-2) journal November 2002
Understanding ENSO Diversity journal June 2015
Recharge Oscillator Mechanisms in Two Types of ENSO journal September 2013
Cold Tongue and Warm Pool ENSO Events in CMIP5: Mean State and Future Projections journal April 2014
Robust ENSO across a Wide Range of Climates journal August 2014
ENSO Complexity Induced by State Dependence of Westerly Wind Events journal May 2017
El Niño–La Niña Asymmetry in the Coupled Model Intercomparison Project Simulations* journal July 2005
ENSO Regime Change since the Late 1970s as Manifested by Two Types of ENSO journal January 2013
An Improved Atmospheric Component of Zebiak-Cane Model for Simulating ENSO Winds journal January 2015
The Role of Zonal Advection Feedback in Phase Transition and Growth of ENSO in the Cane-Zebiak Model [Cane-ZebiakモデルにおけるENSOの位相遷移と成長に果たす東西移流フィードバックの役割] journal January 1999

Cited By (6)

Statistical predictability of Niño indices for two types of ENSO journal September 2018
El Niño–East Asian monsoon teleconnection and its diversity in CMIP5 models journal August 2019
The unusual 2014–2016 El Niño events: Dynamics, prediction and enlightenments journal December 2019
ENSO Diversity from an Atmospheric Perspective journal June 2019
ENSO Regime Changes Responsible for Decadal Phase Relationship Variations Between ENSO Sea Surface Temperature and Warm Water Volume journal July 2019
El Niño–Southern Oscillation complexity journal July 2018

Similar Records

Insights into ENSO Diversity from an Intermediate Coupled Model. Part I: Uniqueness and Sensitivity of the ENSO Mode
Journal Article · Wed Nov 01 00:00:00 EDT 2023 · Journal of Climate · OSTI ID:2007121

ENSO Diversity Simulated in a Revised Cane-Zebiak Model
Journal Article · Mon Apr 25 00:00:00 EDT 2022 · Frontiers in Earth Science · OSTI ID:1981070

On the Breakdown of ENSO's Relationship With Thermocline Depth in the Central-Equatorial Pacific
Journal Article · Tue Apr 06 00:00:00 EDT 2021 · Geophysical Research Letters · OSTI ID:1850895