CEDAR: Polar Summer Mesospheric Dynamics from Cloud Tracking with AIM CIPS (Aeronomy of Ice Cloud Imaging and Particle Size) Imagery

CEDAR：使用 AIM CIPS（冰云成像和颗粒尺寸航空学）图像进行云跟踪，了解极地夏季中层动力学

• 批准号: 1651394
• 负责人: Ping-Ping Rong
• 金额: $ 29.88万
• 依托单位: Hampton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-06-15 至 2021-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1651394&HistoricalAwards=false
• 关键词: CEDAR; Polar; Summer; Mesospheric; Dynamics; CEDAR; Polar; Summer; Mesospheric; Dynamics

The primary goal of this research is to achieve improved understanding of polar summer mesospheric dynamics and its coupling to the lower atmosphere. The methodology is based upon applying comprehensive data analyses to large ensembles of horizontal winds and gravity wave (GW) structures derived from the Aeronomy of Ice in the Mesosphere (AIM) satellite polar mesospheric cloud (PMC) observations. Horizontal winds will be derived using a cloud wind tracking algorithm applied to a full set of GW structures detected within each bowtie image of PMC forms. The cloud detection and GW analysis would be applied to the PMC measurements taken by the AIM Cloud Imaging and Particle Size experiment (CIPS) instrument (2007-current) for both northern and southern hemispheres (NH and SH). These winds would be validated in terms of monthly climatology or via coincidence comparisons for individual wind derivations. Undergraduate and graduate student participation is expected.Based on these results, two science objectives would be studied. The first objective would be the quantification of the occurrence frequency of GWs for each type of GW morphology. These results would be explored to determine possible GW source regions and to consider the wind filtering conditions that lead to either local GW excitation or the upward and poleward propagation of the GW event to the site of the observation. The other science objective is to study the fast traveling planetary waves (PWs) after correcting for the satellite aliasing effect. These PW events would allow the question of variability be examined regarding the inter-annual variability of the PW activity seen in the mesospheric winds and PMC albedo over the AIM mission period (2007-current). These results would also determine whether any inter-hemispheric tele-connection exists between the PW activity and the polar winter stratospheric vortex strength or temperature inside the vortex in the opposite hemisphere. Such a tele-connection would contribute toward understanding the details of the driving mechanism underlying the development of the polar summer PWs.

这项研究的主要目的是提高对极地夏季中层动力学及其与低大气的耦合的了解。该方法基于将全面的数据分析应用于大型水平风和重力波（GW）结构，这些结构源自中部层中冰的自动性（AIM）卫星极性中层云（PMC）观察结果。将使用应用于PMC形式的每个Bowtie图像中检测到的完整的GW结构的云风跟踪算法来得出水平风。云检测和GW分析将应用于北半球和南半球（NH和SH）的AIM云成像和粒径实验（CIPS）仪器（2007-CRURTENT）进行的PMC测量。这些风将通过每月气候学或通过单个风派的巧合比较来验证。预计本科生和研究生的参与。基于这些结果，将研究两个科学目标。 第一个目标是定量GWS的发生频率对每种类型的GW形态。将探索这些结果以确定可能的GW源区域，并考虑导致局部GW激发的风过滤条件，或者GW事件的向上和极向传播到观测站点。另一个科学目标是在校正卫星混叠效果后研究快速行进的行星波（PW）。这些PW事件将允许在AIM任务期间（2007年电流）中对中层风和PMC反照率中的PW活动的年际变异性进行可变性问题。 这些结果还将确定PW活性与相反半球的涡流内部涡流涡流强度或涡流中的极性冬季平流层涡流强度或温度之间是否存在任何半球间的远程连接。这种远程连接将有助于理解极地夏季PWS开发的驾驶机制的细节。