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Dr. Jieshun Zhu(UMD)在我室报告
来源:LASG    访问次数:    更新时间:2017-5-10

Challenges in ENSO Prediction: Initialization uncertainties and Model inadequacies

Dr. Jieshun Zhu
ESSIC, University of Maryland

2017年5月10日(星期三)10:00
科研楼303会议室

报告会主持人:肖子牛 研究员

Abstract:

Since initial attempts by Cane et al. around three decades ago, the ability of dynamical models to predict the El Niño and the Southern Oscillation (ENSO) has improved significantly. Operational seasonal ENSO predictions now become routine in many major climate centers worldwide by using coupled general circulation models (CGCMs) with sophisticated initialization schemes.   On occasions, however, our ENSO predictions can still have notable failures and the forecasts are not yet reliable, two notable examples being the false alarms in 2012 and 2014. In this talk, I will discuss the challenges in ENSO prediction by focusing on initialization uncertainties and model inadequacies. Particularly, I will present results about the role of salinity initialization in ENSO prediction, the contribution of off-equatorial SST anomalies (some signals that could be realistically represented by present CGCMs because of biases in representing thermodynamical process) in 2014 El Niño false alarm, and the importance of atmospheric convection parameterization in ENSO prediction.

 
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