Impact of Nonmigrating Tides on the Thermospheric Energy Budget and Constituents

非迁移潮汐对热层能量预算和成分的影响

基本信息

  • 批准号:
    1112704
  • 负责人:
  • 金额:
    $ 29.8万
  • 依托单位:
  • 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:
    2013-06-01 至 2018-05-31
  • 项目状态:
    已结题

项目摘要

This project aims to delineate and understand the impact of non-migrating tides on parameters important to the aeronomy of the ionosphere-thermosphere system, such as constituents, infrared emission rates and the thermospheric energy budget. Non-migrating tides are pervasive and known to occur in neutral winds, temperature, neutral density, and ionospheric parameters such as plasma densities and electric fields. They manifest themselves in longitude and local time variability, which recent observations from ground and space have shown to be significant. Based on these new findings, significant non-migrating tidal variations may also be present in thermospheric composition and in the infrared emission of energy to the lower atmosphere and to space. This variability will affect the ionosphere-thermosphere system in various ways, including its photochemistry, energy budget, and neutral-plasma coupling. The investigation will examine the tidal variability in [O]/[N2] column density ratio and in nitric oxide and carbon dioxide volume emission rates of energy, connect it quantitatively with the tides in temperature and winds and provide an assessment of the relative importance for neutral-plasma coupling and the thermospheric energy budget as function of season and solar cycle. Towards this goal, the project will synergistically employ data from the GUVI and SABER instruments on the TIMED satellite and an existing, observation-based model of temperature and wind tides in the thermosphere. GUVI will provide the [O]/[N2] column density and SABER nitric oxide and carbon dioxide volume emission rates of energy emitted at 5.3 microns and 15 microns, respectively. The project will support a Ph.D. student and involve summer undergraduate students in the research. Non-migrating tides largely originate in the troposphere as heat is released by evaporation and condensation near the surface. The effects to be investigated are thus a measure for the geospace response to tropospheric weather and how energy and momentum are transported from the lower into the upper atmosphere. The study will provide observational constraints for an important neutral-plasma coupling process, tidal [O]/[N2] variations, that is predicted by current mechanistic and first principles models. It will provide first insight into the weather impact on Earth's "natural thermostat", the nitric oxide 5.3 micron emissions, by which heat and solar energy are efficiently lost from the thermosphere to space and to the lower atmosphere.
该项目旨在描述和理解非迁移潮汐对电离层-热层系统的重要参数的影响,如成分、红外发射率和热层能量收支。非迁移潮汐是普遍存在的,已知会发生在中性风、温度、中性密度和电离层参数(如等离子体密度和电场)中。它们表现在经度和当地时间的变率上,最近从地面和空间进行的观测表明这一点很重要。根据这些新发现,在热层成分和向低层大气和空间发射的红外能量中也可能存在显著的非迁移潮汐变化。这种变异性将以各种方式影响电离层-热层系统,包括其光化学、能量收支和中性等离子体耦合。该研究将考察[O]/[N2]柱密度比、一氧化氮和二氧化碳能量体积排放率的潮汐变化,定量地将其与温度和风的潮汐联系起来,并评估中性等离子体耦合和热层能量收支作为季节和太阳周期函数的相对重要性。为了实现这一目标,该项目将协同利用TIMED卫星上的GUVI和SABER仪器的数据以及现有的基于观测的热层温度和风潮模型。GUVI将分别提供[O]/[N2]柱密度和SABER在5.3微米和15微米处发射能量的一氧化氮和二氧化碳体积发射率。该项目将支持一名博士生和暑期本科生参与研究。非迁移潮汐主要起源于对流层,因为热量是通过表面附近的蒸发和凝结释放的。因此,要研究的影响是测量地球空间对对流层天气的响应,以及能量和动量如何从低层大气输送到高层大气。该研究将为一个重要的中性等离子体耦合过程——潮汐[O]/[N2]变化——提供观测约束,该过程是由当前的机制和第一性原理模型预测的。它将首次深入了解天气对地球“天然恒温器”的影响,即5.3微米的一氧化氮排放物,通过这种排放物,热量和太阳能从热层有效地流失到太空和低层大气。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

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Jens Oberheide其他文献

CAWSES-II Task Group 4 : What is the geospace response to variable inputs from the lower atmosphere?
CAWSES-II 任务组 4:地球空间对来自低层大气的变量输入的响应是什么?
  • DOI:
  • 发表时间:
    2010
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Kazuo Shiokawa;Jens Oberheide;CAWSES-II Task Group 4
  • 通讯作者:
    CAWSES-II Task Group 4

Jens Oberheide的其他文献

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{{ truncateString('Jens Oberheide', 18)}}的其他基金

FDSS Track 1: Integrating Research and Education in Magnetosphere-Ionosphere-Atmosphere Coupling at Clemson University
FDSS Track 1:克莱姆森大学磁层-电离层-大气耦合研究与教育相结合
  • 批准号:
    2347149
  • 财政年份:
    2024
  • 资助金额:
    $ 29.8万
  • 项目类别:
    Continuing Grant
Collaborative Research: CEDAR--Observational and Numerical Studies of Tide-planetary Wave Coupling
合作研究:CEDAR——潮汐-行星波耦合的观测和数值研究
  • 批准号:
    1139048
  • 财政年份:
    2012
  • 资助金额:
    $ 29.8万
  • 项目类别:
    Continuing Grant

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Nonmigrating tidal coupling from the MLT region into the ionosphere and upper thermosphere
从 MLT 区域到电离层和上层热层的非迁移潮汐耦合
  • 批准号:
    128245217
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  • 财政年份:
    2007
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Nonmigrating tides in the mesosphere and lower thermosphere: variability and aeronomic implications- Phase III
中层和低层热层的非迁移潮汐:变化和航空影响 - 第三阶段
  • 批准号:
    5454631
  • 财政年份:
    2005
  • 资助金额:
    $ 29.8万
  • 项目类别:
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  • 批准号:
    14580777
  • 财政年份:
    2002
  • 资助金额:
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  • 项目类别:
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CEDAR: Identification of Planetary Waves and Migrating as well as Nonmigrating Tidal Oscillations at Latitudes Using a Longitudinal Chain of Airglow Optical Instruments
CEDAR:使用气辉光学仪器的纵向链识别行星波以及纬度上的迁移和非迁移潮汐振荡
  • 批准号:
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