Collaborative Research: CEDAR--A Focused Study of Sustained Upward Vertical Winds in the Auroral Zone

研究人员将使用多仪器观测活动的数据，这些数据集中在AK费尔班克斯附近的Poker Flat研究范围内，研究热层中持续向上垂直风（SUVW）的现象，这种现象与极光活动的软颗粒降水有关。这些风的速度超过每秒15米，并在几个小时内持续上升。它们之前通常有一段时间的风速为20至30米/秒的下风。垂直风对理解高层大气的复杂动态行为很重要，而不是一个有趣的好奇心。热层中的垂直风负责垂直质量运输，破坏分层和改变局部成分，这可能导致整体热收支的变化。了解这些持续垂直上升风的潜在来源，将有助于预测其发生的全球分布及其对热层动力学的影响。该研究将利用阿拉斯加中部极光区关键仪器的关键质量，这些仪器将产生综合数据集，以表征极光输入和导致持续向上垂直风事件的大尺度热层条件。观测垂直风的主要仪器将是一组三个成像法布里-珀罗干涉仪（FPI），位于育空堡的扑克平原和AK的鹰，专门用于高节奏天顶测量。相关仪器包括Poker Flat非相干散射雷达（PFISR），一套四台扫描多普勒成像仪（SDI），分别位于akona Toolik Field Station和AK Kaktovik， Poker Flat的全天摄像机和子午线光谱仪以及远程观测站。这项工作的更广泛影响将是通过参与对zenith FPI仪器获得的数据的分析，为本科生提供技术研究方面的培训和教育机会。

The investigators will use data from a multi-instrument observational campaign centered on Poker Flat Research Range near Fairbanks, AK to study the phenomenon of sustained upward vertical winds (SUVW) in the thermosphere that are associated with the soft particle precipitation of auroral activity. These winds have speeds in excess of 15 meters per second and appear continuously upward over several hours. They are generally preceded by a period of downward winds with speeds of 20 to 30 m/s. Far from being an intriguing curiosity, vertical winds are important to understanding the complex dynamic behavior of the upper atmosphere. Vertical winds in the thermosphere are responsible for vertical mass transport, disrupting stratification and changing the local composition, which can lead to changes in the overall thermal budget. Understanding the underlying source of these sustained vertical upward winds will enable a prediction of the global distribution of their occurrence and their impact on thermospheric dynamics. The study will take advantage of a critical mass of key instruments in the auroral zone in central Alaska that will produce comprehensive data sets to characterize the auroral input and large scale thermospheric conditions leading to the sustained upward vertical wind events. The primary instruments for observing vertical winds will be a set of three imaging Fabry-Perot interferometers (FPI), located at Poker Flat, Fort Yukon and Eagle, AK and dedicated to high-cadence zenith measurements. The contextual instruments include the Poker Flat Incoherent Scatter Radar (PFISR), a set of four scanning Doppler imagers (SDI) at Poker Flat, Gakona, Toolik Field Station, and Kaktovik, AK, all-sky cameras and meridian spectrographs at Poker Flat and remote observing sites. The broader impacts of this work will be the training and educational opportunities for undergraduates in technical research by participating in the analysis of the data obtained by the zenith FPI instruments.