Atmospheric Tides and Their Effects on Ionosphere-Thermosphere-Mesosphere (ITM) Dynamics, Composition, and Structure

大气潮汐及其对电离层-热层-中间层 (ITM) 动力学、成分和结构的影响

• 批准号: 0903179
• 负责人: Jeffrey Forbes
• 金额: $ 57.48万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0903179&HistoricalAwards=false
• 关键词: Atmospheric; Tides; Their; Effects; Ionosphere

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This project aims to better delineate the global manifestations of non-migrating tides from the stratosphere through the thermosphere and to better determine the origin of the non-migrating tides which is largely in the troposphere. The investigation of the non-migrating tidal signatures will include examination of their intra-annual, intra-seasonal, and inter-annual variations. Observational data will be employed to drive non-migrating tidal solutions in the Thermosphere-Ionosphere-Mesosphere-Electrodynamics General Circulation Model (GCM) and the Thermosphere-Ionosphere-Electrodynamics GCM housed at the National Center for Atmospheric Research (NCAR). These will be used to obtain realistic simulations of global atmospheric tidal perturbations in winds, temperatures, densities, minor constituents, airglow emissions, electric fields, and ionospheric composition from 30 km to 500 km altitude. Temperature measurements from the TIMED spacecraft between plus-and-minus 50 degrees latitude and 20 - 120 km altitude during 2002-2008, combined with tidal theory, will provide the temperature, wind, and geopotential perturbations needed by the models in order to parameterize and represent tidal effects at the models' lower boundaries. Latest determinations of radiative and latent heating due to rainfall will be included as well as the specification of planetary waves. The model results will form a framework for the interpretation of existing measurements of tidal variations over the globe, especially in terms of the longitude variability in the mesosphere-thermosphere-ionosphere region which recent observations from ground and space have shown to be significant. This longitude variability is pervasive and occurs in neutral winds and temperatures, minor constituent densities and airglow emissions, and ionospheric parameters such as plasma density and electric fields. In terms of broader impacts, the project will support a Ph.D. student and include undergraduate students in the research activities. Since the study will help in the understanding and interpretation of diverse satellite data sets, it will be a resource for satellite science programs in both analysis and interpretation of results, and help improve the NCAR upper atmosphere models.

该奖项是根据2009年的《美国回收与再投资法》（公法111-5）资助的。该项目旨在更好地描述从平流层通过热层从平流层划定非迁移潮汐的全球表现，并更好地确定非移民潮汐的起源，而非移民潮汐的起源很大。 对非迁移潮汐签名的研究将包括检查其年度内，季节内和年际变化。 观察数据将用于驱动非迁移潮汐溶液中的非迁移潮层溶液 - 层 - 层 - 电力学通用循环模型（GCM）和位于国家大气研究中心（NCAR）的热层 - 离子层 - 电动力学GCM。 这些将用于获取对风，温度，密度，次要成分，空气槽排放，电场和电离层组成的现实模拟，从30公里到500 km。在2002 - 2008年期间，从纬度和小时50度和20-120 km高度之间的定时航天器的温度测量值，结合潮汐理论，将提供模型所需的温度，风和地理电位扰动，以便在模型的下边界对潮汐效应。 将包括降雨引起的辐射和潜在加热的最新确定以及行星波的规格。 该模型的结果将构成一个框架，以解释全球潮汐变化的现有测量结果，尤其是在中层 - 热球 - 离子层区域的经度变异性方面，该区域最近从地面和空间观察到了这一点。这种经度的变异性普遍存在，并且发生在中性风和温度，较小的组成密度和气流排放以及电离层参数（例如等离子体密度和电场）中。就更广泛的影响而言，该项目将支持博士学位。学生并将本科生包括在研究活动中。 由于该研究将有助于理解和解释各种卫星数据集，因此它将成为卫星科学计划的资源，以分析和解释结果，并有助于改善NCAR上层大气模型。