Relative Contribution of Extreme Ultraviolet (EUV) Radiation, Lower Atmosphere Waves, and Geomagnetic Activity on Thermosphere-ionosphere Spatial Structure and Temporal Variability

极紫外 (EUV) 辐射、低层大气波和地磁活动对热层-电离层空间结构和时间变化的相对贡献

• 批准号: 1651459
• 负责人: Mariangel Fedrizzi
• 金额: $ 38.99万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-15 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1651459&HistoricalAwards=false
• 关键词: Relative; Contribution; Extreme; Ultraviolet; EUV

The Earth's upper atmosphere is strongly controlled by three external sources of energy and momentum: solar radiation, magnetospheric forcing, and lower atmospheric waves that propagate upwards into the upper atmosphere. All these external forcing mechanisms introduce considerable variability and complexity into the structure and dynamics of the thermosphere and ionosphere. This award would study the possible sources of the variability to quantify the relative impact of these fundamental external sources of energy and momentum on the thermosphere-ionosphere (T-I) system, for short time scales of hour-to-hour and day-to-day and short spatial scales. The modeling work planned would enhance the understanding of the impact and the relative importance of the short-term variability driven by lower atmosphere, solar and geomagnetic forcing on various physical processes of the T-I system. Results from this study will suggest areas of research and theoretical work for future improvement in the description of the coupling between the neutral and ionized atmosphere. This investigation would improve the characterization and understanding of the thermospheric-ionospheric daily variability that can affect various technological systems, including GPS positioning, navigation and HF propagation for commercial and military purposes. These results achieved would include neutral density predictions for orbit propagation models used to determine the location of space objects in the relatively near-term for purposes of collision avoidance or re-entry predictions, and also to make long-term predictions about the debris environment.This project would support a female scientist (as PI) and an undergraduate student. Ionospheric variability studied in this project impacts GPS and other HF radio systems used for commercial and military purposes. This work would help establish driver-response relationships that would contribute to the improvement of space weather empirical or hybrid empirical/physical models. Thermospheric changes are also relevant to spacecraft operations since they represent variations in LEO satellite drag. The models being used in this study are part of the CCMC, so any improvements will benefit other users, and the codes being used are available to other users in the CEDAR community.

地球的高层大气受到三种外部能量和动量源的强烈控制：太阳辐射、磁层强迫和向上传播到高层大气的低层大气波。所有这些外部强迫机制给热层和电离层的结构和动力学带来了相当大的可变性和复杂性。该奖项将研究可变性的可能来源，以量化这些基本外部能源和动量对热层-电离层（T-I）系统的相对影响，在每小时和每天的短时间尺度和短空间尺度上。计划中的建模工作将增强对低层大气、太阳和地磁强迫驱动的短期变化对 T-I 系统各种物理过程的影响和相对重要性的理解。这项研究的结果将为未来改进中性大气和电离大气之间耦合的描述提出研究领域和理论工作。这项研究将改善对热层-电离层日常变化的表征和理解，这种变化可能影响各种技术系统，包括用于商业和军事目的的 GPS 定位、导航和高频传播。取得的这些成果将包括轨道传播模型的中性密度预测，用于确定空间物体在相对近期内的位置，以避免碰撞或重返大气层预测，以及对碎片环境进行长期预测。该项目将支持一名女科学家（作为 PI）和一名本科生。本项目研究的电离层变化会影响 GPS 和其他用于商业和军事目的的高频无线电系统。这项工作将有助于建立驾驶员响应关系，从而有助于改进空间天气经验或混合经验/物理模型。热层变化也与航天器运行有关，因为它们代表了低地球轨道卫星阻力的变化。本研究中使用的模型是 CCMC 的一部分，因此任何改进都将使其他用户受益，并且所使用的代码可供 CEDAR 社区的其他用户使用。

项目成果

Effect of Magnetic Storm Related Thermospheric Changes on the Evolution of Equatorial Plasma Bubbles

• DOI: 10.1029/2018ja025995
• 发表时间: 2019-03
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: A. Bhattacharyya;M. Fedrizzi;T. Fuller‐Rowell;P. Gurram;B. Kakad;S. Sripathi;S. Sunda

Space Weather Modeling Capabilities Assessment: Neutral Density for Orbit Determination at low Earth orbit

• DOI: 10.1029/2018sw002027
• 发表时间: 2018-11
• 期刊: Space Weather
• 作者: S. Bruinsma;Eric K. Sutton;Stanley C. Solomon;Tim Fuller-Rowell;M. Fedrizzi

Validation of Ionospheric Specifications During Geomagnetic Storms: TEC and foF2 During the 2013 March Storm Event‐II

地磁风暴期间电离层规范的验证：2013 年 3 月风暴事件期间的 TEC 和 foF2 II

• DOI: 10.1029/2022sw003388
• 发表时间: 2023
• 期刊: Space Weather
• 影响因子: 3.7
• 作者: Shim, J. S.;Song, I.‐S.;Jee, G.;Kwak, Y.‐S.;Tsagouri, I.;Goncharenko, L.;McInerney, J.;Vitt, A.;Rastaetter, L.;Yue, J.
• 通讯作者: Yue, J.

Storm time neutral density assimilation in the thermosphere ionosphere with TIDA

使用 TIDA 进行热层电离层风暴时间中性密度同化

• DOI: 10.1051/swsc/2022011
• 发表时间: 2022
• 期刊: Journal of Space Weather and Space Climate
• 影响因子: 3.3
• 作者: Codrescu, Mihail V.;Codrescu, Stefan M.;Fedrizzi, Mariangel
• 通讯作者: Fedrizzi, Mariangel

Validation of Ionospheric Specifications During Geomagnetic Storms: TEC and foF2 During the 2013 March Storm Event

地磁风暴期间电离层规范的验证：2013 年 3 月风暴事件期间的 TEC 和 foF2

• DOI: 10.1029/2018sw002034
• 发表时间: 2018
• 期刊: Space Weather
• 影响因子: 3.7
• 作者: Shim, J. S.;Tsagouri, I.;Goncharenko, L.;Rastaetter, L.;Kuznetsova, M.;Bilitza, D.;Codrescu, M.;Coster, A. J.;Solomon, S. C.;Fedrizzi, M.
• 通讯作者: Fedrizzi, M.