Diabatic Processes of the Madden-Julian Oscillation (MJO): Enabling and Analyzing THORPEX MJO Task Force and GEWEX Atmospheric System Study Global Model Evaluation Project

马登-朱利安振荡 (MJO) 的非绝热过程：启用和分析 THORPEX MJO 工作组和 GEWEX 大气系统研究全球模型评估项目

• 批准号: 1221013
• 负责人: Duane Waliser
• 金额: $ 49.74万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1221013&HistoricalAwards=false
• 关键词: Diabatic; Processes; Madden; Julian; Oscillation

Given the central role of diabatic heating in Madden-Julian Oscillation (MJO) physics and theory along with the demands for reducing model deficiencies in simulating and predicting the MJO and related phenomena, it is of great interest and urgent need to explore how MJO vertical heating structures are represented in current General Circulation Models (GCMs). To address this demand, a joint research activity has been suggested and formulated by the World Climate Research Program (WCRP) World Weather Research Program (WWRP)/THORPEX MJO Task Force (MJOTF) and the GEWEX Atmospheric System Study (GASS). The objectives of the international research activity are to characterize, compare and evaluate the heating, moistening and momentum mixing processes associated with the MJO that are produced by present-day global weather and climate models, with a focus on their vertical structure. The GASS activity represents the first multi-model comparison and evaluation of the vertical structure and evolution of diabatic processes of the MJO.The objectives of this project are to: (i) support a contribution of overall organizational leadership to the MJOTF and GASS diabatic processes experiment; (ii) provide the logistical and management support associated with the climatological component of the experiment; and (iii) undertake the initial/lead analysis of the climatological component of the experiment. A tangible outcome, of this project is that it will provide valuable guidance for improving model fidelity in representing a number of fast processes, including convection, clouds, radiation, and boundary layer, associated with the MJO and related tropical phenomena. Such improvements have the potential to improve forecasting at subseasonal time scales. Thus this project has substantial broader impacts.

鉴于非绝热加热在MJO物理学和理论中的核心作用沿着在模拟和预测MJO及相关现象时减少模型缺陷的需求，探索MJO垂直加热结构如何在当前的大气环流模式（GCM）中表示是非常有趣和迫切需要的。为了满足这一需求，世界气候研究方案、世界天气研究方案/THORPEX MJO工作队和GEWEX大气系统研究建议并制定了一项联合研究活动。国际研究活动的目标是描述、比较和评价与当今全球天气和气候模型产生的MJO有关的加热、增湿和动量混合过程，重点是其垂直结构。GASS活动代表了对MJO非绝热过程的垂直结构和演变的首次多模式比较和评估。该项目的目标是：（i）支持对MJOTF和GASS非绝热过程实验的总体组织领导的贡献;（ii）提供与实验的气候组成部分相关的后勤和管理支持;及（iii）对试验的气候部分进行初步/主要分析。该项目的一个切实成果是，它将为提高模型保真度提供有价值的指导，以代表与MJO和相关热带现象相关的一些快速过程，包括对流，云，辐射和边界层。这种改进有可能改善亚季节时间尺度的预测。 因此，该项目具有相当广泛的影响。