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

合作研究：CEDAR——极光区持续向上垂直风的重点研究

• 批准号: 1243077
• 负责人: Mark Leising
• 金额: $ 5.18万
• 依托单位: Clemson University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-05-01 至 2016-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1243077&HistoricalAwards=false
• 关键词: Collaborative; Research; CEDAR; Focused; Study

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.

研究人员将使用以Fairbanks附近的扑克平面研究范围为中心的多个仪器观测活动的数据，以研究热层中持续向上垂直风（SUVW）的现象，这些现象与极光活性的软颗粒降水有关。这些风的速度超过每秒15米，并且在几个小时内持续向上显示。它们通常是在速度为20至30 m/s的速度之前。垂直风对于理解上层大气的复杂动态行为而言，垂直风很重要。热层中的垂直风负责垂直质量运输，破坏分层并改变局部组成，从而导致整体热预算发生变化。了解这些持续的垂直向上风的潜在来源将可以预测其发生的全球分布及其对热圈动力学的影响。这项研究将利用阿拉斯加中部极光区的临界量重要仪器，这些仪器将产生全面的数据集，以表征极光输入和大规模的热层条件，从而导致持续的向上垂直风事件。观察垂直风的主要仪器将是一组三个成像Fabry-Perot干涉仪（FPI），位于扑克扁平，Yukon堡和Eagle，AK，AK，专用于高环境Zenith测量值。上下文仪器包括扑克平面不连贯的散点雷达（PFISR），一组在扑克平面，Gakona，Toolik Field Station和Kaktovik，Kaktovik，AK，AL-Skiky镜头，全型照相机和子午线光谱仪上的四个扫描多普勒成像器（SDI）组合。这项工作的更广泛的影响将是通过参与Zenith FPI仪器获得的数据分析，在技术研究中为大学生提供的培训和教育机会。