Signature of gravity wave propagations from the troposphere to ionosphere

IF 1.7 4区地球科学 Q3 ASTRONOMY & ASTROPHYSICS Annales Geophysicae Pub Date : 2022-12-01 DOI:10.5194/angeo-40-665-2022

H. Takahashi, C. Figueiredo, P. Essien, C. M. Wrasse, D. Barros, P. K. Nyassor, I. Paulino, F. Egito, Geângelo de Matos Rosa, Antonio Hélder Rodrigues Sampaio

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引用次数: 2

Abstract

Abstract. We observed a gravity wave (GW) signature in the OH emission layer in the upper mesosphere, and 4 h later, a medium-scale travelling ionospheric disturbance (MSTID) in the OI 630 nm emission layer. Spectral analysis of the two waves showed that both have almost the same wave characteristics: wavelength, period, phase speed and propagation direction, respectively, 200 km, 60 min, 50 m s−1, toward the southeast. From the gravity wave ray-tracing simulation for the mesospheric gravity wave, we found that the wave came from a tropospheric deep convection spot and propagated up to the 140 km altitude. Regarding the same wave characteristics between mesospheric GW and ionospheric MSTID, the two possible cases are investigated: a direct influence of the GW oscillation in the OI 630 nm emission height and the generation of a secondary wave during the GW breaking process. This is the first time to report an observational event of gravity wave propagation from the troposphere, mesosphere to thermosphere–ionosphere in the South American region.

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重力波从对流层传播到电离层的特征

摘要在中高层的oh630nm发射层观测到重力波(GW)信号，4 h后在oh630nm发射层观测到中等尺度的电离层扰动(MSTID)。对两波的频谱分析表明，两波的波长、周期、相速和传播方向基本一致，分别为200 km、60 min、50 m s−1，向东南方向传播。通过对中间层重力波的射线追踪模拟，我们发现重力波来自对流层深对流点，传播高度高达140 km。对于中间层GW和电离层MSTID之间相同的波特性，研究了两种可能的情况:在OI 630 nm发射高度上GW振荡的直接影响和GW破裂过程中二次波的产生。这是首次报道在南美洲地区从对流层、中间层到热层-电离层重力波传播的观测事件。

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来源期刊

Annales Geophysicae 地学-地球科学综合

CiteScore

4.30

自引率

0.00%

发文量

审稿时长

2 months

期刊介绍： Annales Geophysicae (ANGEO) is a not-for-profit international multi- and inter-disciplinary scientific open-access journal in the field of solar–terrestrial and planetary sciences. ANGEO publishes original articles and short communications (letters) on research of the Sun–Earth system, including the science of space weather, solar–terrestrial plasma physics, the Earth''s ionosphere and atmosphere, the magnetosphere, and the study of planets and planetary systems, the interaction between the different spheres of a planet, and the interaction across the planetary system. Topics range from space weathering, planetary magnetic field, and planetary interior and surface dynamics to the formation and evolution of planetary systems.