Contrasting the termination of moderate and extreme El Niño events in coupled general circulation models

@article{Lengaigne2010ContrastingTT,
  title={Contrasting the termination of moderate and extreme El Ni{\~n}o events in coupled general circulation models},
  author={M. Lengaigne and G. Vecchi},
  journal={Climate Dynamics},
  year={2010},
  volume={35},
  pages={299-313}
}
As in the observed record, the termination of El Niño in the coupled IPCC-AR4 climate models involves meridional processes tied to the seasonal cycle. These meridional processes both precondition the termination of El Niño events in general and lead to a peculiar termination of extreme El Niño events (such as those of 1982–83 and 1997–98), in which the eastern equatorial Pacific warm sea surface temperature anomalies (SSTA) persist well into boreal spring/early-summer. The mechanisms… Expand

Figures and Tables from this paper

Spring persistence, transition, and resurgence of El Niño
We present a systematic exploration of differences in the spatiotemporal sea surface temperature (SST) evolution along the equatorial Pacific among observed El Nino events. This inter-El NinoExpand
Warm Pool and Cold Tongue El Nino Events as Simulated by the GFDL 2.1 Coupled GCM
Recent studies report that two types of El Nino events have been observed. One is the cold tongue (CT) El Nino, which is characterized by relatively large sea surface temperature (SST) anomalies inExpand
Contrasting the evolution between two types of El Niño in a data assimilation model
Simulation outputs were used to contrast the distinct evolution patterns between two types of El Niño. The modeled isotherm depth anomalies closely matched satellite sea surface height anomalies.Expand
Modelled Rainfall Response to Strong El Niño Sea Surface Temperature Anomalies in the Tropical Pacific
AbstractEl Nino–Southern Oscillation strongly influences the interannual variability of rainfall over the Pacific, shifting the position and orientation of the South Pacific convergence zone (SPCZ)Expand
The Effect of the South Pacific Convergence Zone on the Termination of El Niño Events and the Meridional Asymmetry of ENSO
AbstractDuring large El Nino events the westerly wind response to the eastern equatorial Pacific sea surface temperature anomalies (SSTAs) shifts southward during boreal winter and early spring,Expand
The Varied Impacts of El Niño–Southern Oscillation on Pacific Island Climates
AbstractEl Nino–Southern Oscillation (ENSO) drives interannual climate variability in many tropical Pacific island countries, but different El Nino events might be expected to produce varyingExpand
Cold Tongue and Warm Pool ENSO Events in CMIP5: Mean State and Future Projections
AbstractThe representation of the El Nino–Southern Oscillation (ENSO) under historical forcing and future projections is analyzed in 34 models from the Coupled Model Intercomparison Project phase 5Expand
Definition of Extreme El Niño and Its Impact on Projected Increase in Extreme El Niño Frequency
During extreme El Nino events, the Intertropical Convergence Zone moves to the normally cold and dry east equatorial Pacific, resulting in a nonlinear rainfall increase with sea surface temperatureExpand
An asymmetric rainfall response to ENSO in East Asia
This study explores the impact of El Niño and La Niña events on precipitation and circulation in East Asia. The results are based on statistical analysis of various observational datasets andExpand
Second peak in the far eastern Pacific sea surface temperature anomaly following strong El Niño events
[1] The eastern Pacific sea surface temperature anomaly (SSTa) associated with El Nino usually peaks in December, January, and February, and decays in the ensuing months; sometimes, however, after aExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 50 REFERENCES
Influence of the Seasonal Cycle on the Termination of El Niño Events in a Coupled General Circulation Model
In this study, the mechanisms leading to the El Nino peak and demise are explored through a coupled general circulation model ensemble approach evaluated against observations. The results hereExpand
Abrupt termination of the 1997–98 El Niño in response to a Madden–Julian oscillation
The role of the Madden–Julian oscillation—a global atmospheric wave in the tropics that is associated with convective activity and propagates eastwards with a period of about 30–60 days (refs 1,Expand
On the termination of the 2002-03 El Niño event
[1] Every new El Nino presents an opportunity to revisit our understanding of El Nino characteristics and processes. We examine the extent to which the termination of the 2002–03 El Nino followed theExpand
The Termination of the 1997-98 El Niño. Part II: Mechanisms of Atmospheric Change
The mechanisms that drove zonal wind stress ( x ) changes in the near-equatorial Pacific at the end of the extreme 1997–98 El Nino event are explored using a global atmospheric general circulationExpand
The Termination of the 1997–98 El Niño. Part I: Mechanisms of Oceanic Change*
The 1997–98 El Nino was both unusually strong and terminated unusually. Warm eastern equatorial Pacific (EEqP) sea surface temperature anomalies (SSTAs) exceeded 4°C at the event peak and lasted wellExpand
Reassessing the role of stochastic forcing in the 1997–1998 El Niño
We explore the extent to which stochastic atmospheric variability was fundamental to development of extreme sea surface temperature anomalies (SSTAs) during the 1997-8 El Nino. The observed westernExpand
On the termination of El Niño
A feature of the end-phase of recent El Nino periods is thermocline shallowing to normal depths, in the central and eastern equatorial Pacific, before sea surface temperature (SST) returns to normal.Expand
Mechanisms of the 1997–1998 El Niño–La Niña, as inferred from space‐based observations
[1] The intensity of the 1997 El Nino and the 8°C sudden drop in sea surface temperature (SST) around 0°–130°W during the turn into La Nina in 1998 were a surprise to the scientific community. ThisExpand
Indices of El Niño Evolution
Abstract To characterize the nature of El Nino–Southern Oscillation (ENSO), sea surface temperature (SST) anomalies in different regions of the Pacific have been used. An optimal characterization ofExpand
Triggering of El Niño by westerly wind events in a coupled general circulation model
Two ten-members ensemble experiments using a coupled ocean-atmosphere general circulation model are performed to study the dynamical response to a strong westerly wind event (WWE) when the tropicalExpand
...
1
2
3
4
5
...