Collaborative Research: Analysis and Modeling of Convectively-Coupled Equatorial Waves and the Madden-Julian Oscillation

热带扰动对天气和气候具有全球性影响，因此，在大气环流模式中很好地反映其动态是很重要的。研究的目的是利用观测和模拟数据以及统计分析方法，详细研究两种类型的热带大气扰动，对流耦合赤道波（CCEWs）和Madden-Julian振荡（MJO）的动力结构。此外，使用拉格朗日海洋模式，上层海洋响应MJO风扰动也将进行研究。将解决的三个突出问题是：（1）CCEW和MJO的机制和相互作用存在多种相互冲突的理论，（2）全球模型中CCEW和MJO的表示不充分，以及（3）与MJO相关的风扰动迫使海洋开尔文波行为的不确定性。（1）分析CCEW和MJO的机制和相互作用的多个相互冲突的理论的存在;（2）评估CCEW和MJO在GCM中的表示的不充分性;（3）分析MJO相关风扰动强迫的海洋开尔文波行为的不确定性。 更广泛的影响：这项研究将提高我们对CCEW的观测理解，并将改进大气环流模型模拟。该项目将为两名研究生在大气科学方面的职业生涯做准备。

Tropical disturbances have a global impact on weather and climate and for this reason, it is important that their dynamics are well represented in general circulation models. The aim of the research is to study in detail the dynamical structures of two types of tropical atmospheric disturbances, convectively coupled equatorial waves (CCEWs) and the Madden-Julian oscillation (MJO), using observational and modeled data, and statistical analysis methods. Further, using a Lagrangian ocean model, upper ocean response to the MJO wind perturbations will also be studied. Three outstanding problems that will be addressed are (1) the existence of multiple conflicting theories for the mechanisms and interactions of CCEWs and the MJO, (2) the inadequacy of representations of CCEWs and MJOs in global models, and (3) uncertainties in the behavior of oceanic Kelvin waves forced by MJO-related wind perturbations.Intellectual merit: The PI will perform: (1) the analysis of the existence of multiple conflicting theories for the mechanisms and interactions of CCEWs and the MJO; (2) evaluate the inadequacy of representations of CCEWs and MJOs in GCMs; and (3) the analysis of uncertainties in the behavior of oceanic Kelvin waves forced by MJO-related wind perturbations. Broader Impacts: The research will improve our observational understanding of CCEWs and will lead to improved general circulation model simulations. This project will prepare two graduate students for careers in atmospheric sciences.