CEDAR: Theoretical Studies of Electrodynamics with the NCAR TIEGCM

CEDAR：利用 NCAR TIEGCM 进行电动力学理论研究

• 批准号: 9813863
• 负责人: Cassandra Fesen
• 金额: $ 19.5万
• 依托单位: University of Texas at Dallas
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-12-15 至 2002-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9813863&HistoricalAwards=false
• 关键词: CEDAR; Theoretical; Studies; Electrodynamics; NCAR

ATM9813863The investigators will perform numerical modeling of the upper atmosphere using the National Center for Atmospheric Research (NCAR) thermosphere-ionosphere-electrodynamics general circulation model (TIEGCM). The major science focus is to quantify the role of electric fields and neutral winds in low latitude electrodynamics. This addresses one of the most fundamental question in thermospheric/ionospheric research: what is the relative importance of electric fields and neutral winds in determining the ionospheric densities, drifts, and structure? The question is particularly difficult because of the complex interaction between the neutral and ionized gases, involving much feedback and mutual adjustment. The TIEGCM is one of only three models worldwide that treat the coupled thermosphere-ionosphere system self-consistently. The investigators will use the TIEGCM to simulate the ionosphere and thermosphere for different seasons and five levels of solar activity. The model output consists of electric fields, conductivities, and neutral winds. A parametric study will be conducted to assess the relative importance of E region propagating tides and F region winds to the electrodynamics. Validation studies will be conducted using data from radars and optical instruments in Puerto Rico and Peru. The model results will be archived and made available to the scientific community

ATM 9813863研究人员将使用国家大气研究中心（NCAR）的热层-电离层-电动力学大气环流模型（TIEGCM）对高层大气进行数值模拟。 主要的科学重点是量化电场和中性风在低纬度电动力学中的作用。 这解决了热层/电离层研究中最基本的问题之一：电场和中性风在确定电离层密度、漂移和结构方面的相对重要性是什么？ 这个问题特别困难，因为中性气体和电离气体之间存在复杂的相互作用，涉及许多反馈和相互调节。 TIEGCM是全球仅有的三个自洽处理耦合热层-电离层系统的模型之一。 研究人员将使用TIEGCM模拟不同季节和五个太阳活动水平的电离层和热层。 模型输出包括电场、电导率和中性风。 将进行参数研究，以评估E区传播潮汐和F区风对电动力学的相对重要性。 将利用来自波多黎各和秘鲁的雷达和光学仪器的数据进行验证研究。 模型结果将存档并提供给科学界