CEDAR: Mesospheric and Lower Thermospheric Ducting of Gravity Waves Generated by Tropospheric Convection

CEDAR：对流层对流产生的重力波的中层和低热层传导

• 批准号: 0437140
• 负责人: Victor Pasko
• 金额: $ 20.63万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-01-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0437140&HistoricalAwards=false
• 关键词: CEDAR; Mesospheric; Lower; Thermospheric; Ducting

Small-scale, convectively-forced, ducted gravity waves are characterized using 2D and 3D nonlinear numerical models, with the goal of comparing model gravity wave phenomena to data from altitudes where gravity waves are commonly imaged. A preliminary task characterizes the structure, directionality, and effect of a thunderstorm generated gravity wave when ducted into the mesosphere and ultimately to about 87 km (the airglow layer). A second task characterizes the morphology of atmospheric "bore-like" waves as a general phenomenon within an idealized atmosphere. The applicability of that general model to observed mesospheric bores is investigated. A final task determines how linear and nonlinear gravity wave phenomena perturb both the OI 557.7 nm and OH Meinel airglow layers.

使用2D和3D非线性数值模型来描述小尺度、对流强迫的导管重力波，目的是将模型重力波现象与重力波通常成像的高度的数据进行比较。一项初步任务描述了雷暴产生的重力波的结构、方向性和影响，当雷暴被导入中间层并最终到达约87公里(气辉层)时。第二项任务将大气“类钻孔”波的形态描述为理想化大气中的一种普遍现象。研究了该模型对观测到的中层小孔的适用性。最后一项任务是确定线性和非线性重力波现象如何扰乱OI 557.7 nm和OH Meinel气辉层。