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的影响，因此，在一般环流模式中很好地表示热带扰动的动力学是很重要的。利用观测资料、模式资料和统计分析方法，对赤道对流耦合波（CCEWs）和马登-朱利安涛动（MJO）两类热带大气扰动的动力结构进行了详细研究。此外，利用拉格朗日海洋模式，还将研究上层海洋对MJO风扰动的响应。需要解决的三个突出问题是：(1)关于CCEWs和MJO的机制和相互作用存在多种相互矛盾的理论；(2)CCEWs和MJO在全球模式中的表现不充分；(3)MJO相关风扰动迫使海洋开尔文波行为的不确定性。学术价值：PI将执行：(1)分析CCEWs和MJO的机制和相互作用的多种相互矛盾的理论的存在；(2)评估CCEWs和mjo在GCMs中的陈述是否充分；(3) mjo相关风扰动对海洋开尔文波行为的不确定性分析。更广泛的影响：该研究将提高我们对CCEWs的观测认识，并将改进大气环流模式的模拟。该项目将为两名研究生在大气科学领域的职业生涯做好准备。

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.