Study of In-Scale/Out-Of-Scale Energetics/Scale Interactions for the Understanding of a Mechanism for the MJO using DYNAMO Data Sets

该项目旨在了解驱动一种重要的热带季节内变率模式的机制，该模式被称为马登-朱利安振荡(MJO)。本研究使用的主要观测数据是2011-2012年机构间实地活动期间收集的船舶、雷达和卫星的数据集，马登-朱利安振荡动力学(迪纳摩)。将讨论以下关于尺度相互作用的问题：尺度为几公里量级、寿命不到一天的云系如何与尺度为10,000公里、40天的MJO相互作用？这个项目将提供关于大气中不同尺度如何相互通信的见解，即。云，云组织，定义天气扰动的天气尺度，如低气压、日循环、MJO和年度循环。众所周知，MJO的通过对非洲、亚洲、澳大利亚和西太平洋的天气和气候都很重要。最近，MJO时间尺度的存在被用来了解来自亚洲的大气波列如何影响北极天气。要对所有这些功能进行更好的建模，需要对MJO的维护机制和生命周期有更深入的了解。预计通过该项目增进对MJO的了解将有助于改进天气和气候预报。该项目将提供一个机会，培养规模相互作用、热带气象学和高性能计算方面的博士后候选人。此外，实验室的学生访问者将接触到MJO波通过热带不同地区所产生的天气影响的研究。

This project aims at understanding the mechanisms that drive an important tropical mode of intraseasonal variability called the Madden Julian Oscillation (MJO). The main observational data used for this study are datasets from ships, radar and satellites collected during the 2011-2012 interagency field campaign, Dynamics of the Madden-Julian Oscillation (DYNAMO). The following question on scale interactions will be addressed: How do cloud systems whose scale is of the order of a few kilometers and a life time of less than one day interact with the MJO whose scales are 10,000 km and 40 days? This project will provide insights on how different scales in the atmosphere communicate with each other, viz. clouds, cloud organization, the synoptic scale that defines weather disturbances such as lows and depressions, the diurnal cycle, the MJO, and the annual cycle. The passage of the MJO is known to be important for the weather and climate of Africa, Asia, Australia, and the western Pacific Ocean. More recently the presence of the MJO time scale has been invoked for understanding how atmospheric wave trains emanating from Asia impact the Arctic weather. Better modeling of all such features requires a much deeper understanding of the mechanism for the maintenance and the life cycle of the MJO. It is anticipated that improved understanding of the MJO through this project will contribute to improvements in weather and climate forecasts. This project will provide an opportunity to train a post-doctoral candidate in scale interactions, tropical meteorology and high performance computing. In addition student visitors to the laboratory will be exposed to the study of weather impacts arising from the passage of MJO waves over different parts of the tropics.