Incorporating a semi-stochastic model of ocean-modulated westerly wind bursts into an ENSO prediction model

2008 ◽  
Vol 97 (1-2) ◽  
pp. 65-73 ◽  
Author(s):  
Geoffrey Gebbie ◽  
Eli Tziperman
Keyword(s):  
Stochastic Model ◽  
Prediction Model ◽  
Westerly Wind ◽  
Enso Prediction ◽  
Wind Bursts ◽  
Westerly Wind Bursts

Westerly wind bursts in the tropical Pacific

Weather ◽  
1998 ◽  
Vol 53 (9) ◽  
pp. 282-284 ◽  
Author(s):  
Sarah Verbickas
Keyword(s):  
Tropical Pacific ◽  
Westerly Wind ◽  
Wind Bursts ◽  
Westerly Wind Bursts ◽  
The Tropical Pacific

scholarly journals Essential Ingredients to the Dynamics of Westerly Wind Bursts

2019 ◽  
Vol 32 (17) ◽  
pp. 5549-5565 ◽  
Author(s):  
Minmin Fu ◽  
Eli Tziperman
Keyword(s):  
General Circulation ◽  
Circulation Model ◽  
Basic Mechanism ◽  
Surface Heat ◽  
Convective Heating ◽  
Short Time Scale ◽  
Westerly Wind ◽  
Atmospheric Phenomena ◽  
Wind Bursts ◽  
Westerly Wind Bursts

Abstract Westerly wind bursts (WWBs) are brief, anomalously westerly winds in the tropical Pacific that play a role in the dynamics of ENSO through their forcing of ocean Kelvin waves. They have been associated with atmospheric phenomena such as tropical cyclones, the MJO, and convectively coupled Rossby waves, yet their basic mechanism is not yet well understood. We study WWBs using an aquaplanet general circulation model, and find that eastward-propagating convective heating plays a key role in the generation of model WWBs, consistent with previous studies. Furthermore, wind-induced surface heat exchange (WISHE) acts on a short time scale of about two days to dramatically amplify the model WWB winds near the peak of the event. On the other hand, it is found that radiation feedbacks (i.e., changes in the net radiative anomalies accompanying westerly wind bursts) are not essential for the development of WWBs, and act as a weak negative feedback on WWBs and their associated convection. Similarly, sensible surface heat flux anomalies are not found to have an effect on the development of model WWBs.

scholarly journals A study of the effects of westerly wind bursts on ENSO based on CESM

2019 ◽  
Vol 54 (1-2) ◽  
pp. 885-899 ◽  
Author(s):  
Xiaoxiao Tan ◽  
Youmin Tang ◽  
Tao Lian ◽  
Zhixiong Yao ◽  
Xiaojing Li ◽  
...  
Keyword(s):  
El Niño ◽  
El Nino ◽  
Eastern Pacific ◽  
Parameterization Scheme ◽  
Westerly Wind ◽  
Central Pacific ◽  
El Niño Events ◽  
Wind Bursts ◽  
Westerly Wind Bursts ◽  
El Nino Events

AbstractNumerous works have indicated that westerly wind bursts (WWBs) have a significant contribution to the development of El Niño events. However, the simulation of WWBs commonly suffers from large biases in the current generation of coupled general circulation models (CGCMs), limiting our ability to predict El Niño events. In this study, we introduce a WWBs parameterization scheme into the global coupled Community Earth System Model (CESM) to improve the representation of WWBs and to study the impacts of WWBs on El Niño-Southern Oscillation (ENSO) characteristics. It is found that CESM with the WWBs parameterization scheme can generate more realistic characteristics of WWBs, in particular their location and seasonal variation of occurrence. With the parameterized WWBs, the skewness of the Niño 3 index is increased, in better agreement with observation. Eastern Pacific El Niño and central Pacific El Niño events could be successfully reproduced in the model run with WWBs parameterization. Further diagnoses show that the enhanced horizontal advection in the central Pacific and vertical advection in the eastern Pacific, both of which are triggered by WWBs, are crucial factors responsible for the improvements in ENSO simulation. Clearly, WWBs have important effects on ENSO asymmetry and ENSO diversity.

scholarly journals The impact of westerly wind bursts on the diversity and predictability of El Niño events: An ocean energetics perspective

2014 ◽  
Vol 41 (13) ◽  
pp. 4654-4663 ◽  
Author(s):  
Shineng Hu ◽  
Alexey V. Fedorov ◽  
Matthieu Lengaigne ◽  
Eric Guilyardi
Keyword(s):  
El Niño ◽  
El Nino ◽  
Westerly Wind ◽  
El Niño Events ◽  
Ocean Energetics ◽  
The Impact ◽  
Wind Bursts ◽  
Westerly Wind Bursts ◽  
El Nino Events

Effects of Semistochastic Westerly Wind Bursts on ENSO Predictability

2020 ◽  
Vol 47 (14) ◽  
Author(s):  
Xiaoxiao Tan ◽  
Youmin Tang ◽  
Tao Lian ◽  
Shouwen Zhang ◽  
Ting Liu ◽  
...  
Keyword(s):  
Westerly Wind ◽  
Enso Predictability ◽  
Wind Bursts ◽  
Westerly Wind Bursts

scholarly journals Air–Sea Interactions from Westerly Wind Bursts During the November 2011 MJO in the Indian Ocean

2014 ◽  
Vol 95 (8) ◽  
pp. 1185-1199 ◽  
Author(s):  
James N. Moum ◽  
Simon P. de Szoeke ◽  
William D. Smyth ◽  
James B. Edson ◽  
H. Langley DeWitt ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Westerly Wind ◽  
The Indian Ocean ◽  
Wind Bursts ◽  
Westerly Wind Bursts
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