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Observational and theoretical studies of mesospheric dynamics and bores using airglow imagers at mid-latitudes.

机译：在中纬度地区使用气辉成像仪对中层动力学和井眼进行观测和理论研究。

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This dissertation focuses on the study of coupling-dynamics in the mesosphere. Interesting airglow phenomena---primarily internal bores occurring mid-latitude at mesospheric altitudes---have been observed and studied in a multifaceted approach, combining the analysis of experimental data with modelling and theory.;After the initial mesospheric bore sighting by the scientific community in 1993, the next recorded events were observed by Cornell University. To gain additional insight, this investigation effectively pursued more data by installing imaging equipment as part of a collaborative, multi-instrument campaign involving lidar. While coincident lidar data eluded us, we did expand our database allowing us to develop the first classification system to categorize mesospheric bore observations. We also verify for the first time that a mesospheric inversion layer would support bore formation as proposed.;Some of the bore data exhibits features unexpected and new. Most intriguing is that the brightness relationship between airglow layers is reversed and accompanied by a lateral shift! This was the first such "inverse" event reported in the scientific community, and its seemingly contradictory nature fails to support the existing basic theory. Working with researchers at the Air Force Research Laboratory, we propose a new theory extending the original numerical model. We also compare the data to another non-linear theory and find both that: (1) neither theory explains all the observable features, and (2) each theory succeeds in explaining some characteristics not addressed by the competing theory. This theory development suggests that mesospheric bores likely are nonlinear structures propagating within upper atmospheric waveguides such as thermal-inversion layers or wind-shear ducts.;Well into this thesis, we realized the critical and complicated role calibration plays in ensuring the condition of our data. Calibration reduces the discrepancies between the raw error-prone data and a true portrayal of the phenomena, facilitating the generation of congruent, accurate data for analysis. To address some of the calibration challenges and to alleviate some of the confusion for future graduate students, a portion of this dissertation is devoted to providing the first, comprehensive presentation of calibration---detailing topics, techniques, methodologies, and results, as they pertain to airglow imagers.
机译：本文的研究重点是中层流动力学的研究。有趣的气辉现象-主要发生在中层高度的中纬度内空-已通过多方面的方法进行了观察和研究，将实验数据的分析与建模和理论相结合;在1993年的社区中，康奈尔大学观察到了下一个记录的事件。为了获得更多的见解，此调查通过安装成像设备作为涉及激光雷达的协作式多仪器运动的一部分，有效地获取了更多数据。尽管同时出现了激光雷达数据，但我们确实扩展了数据库，从而使我们能够开发出第一个分类系统来对中层孔眼观测进行分类。我们还首次验证了中层反演层将如所建议的那样支持井眼形成。;某些井眼数据显示出意想不到的新特征。最有趣的是，气辉层之间的亮度关系是相反的，并伴随着横向偏移！这是科学界首次报道的这种“逆向”事件，其看似矛盾的性质未能支持现有的基本理论。我们与空军研究实验室的研究人员合作，提出了扩展原始数值模型的新理论。我们还将数据与另一种非线性理论进行比较，发现两者：（1）两种理论均未解释所有可观察的特征，并且（2）每种理论均成功地解释了竞争性理论未解决的某些特征。这一理论的发展表明，中层孔可能是在高层大气波导中传播的非线性结构，例如热反演层或风切变导管。 。校准可减少容易出错的原始数据与现象的真实刻画之间的差异，从而有助于生成一致，准确的数据进行分析。为了解决一些校准挑战并减轻未来研究生的困惑，本论文的一部分致力于提供校准的第一个全面介绍，包括详细的主题，技术，方法和结果，适用于气辉成像仪。

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