Temperature response to the June 2020 solar eclipse observed by FORMOSAT-7/COSMIC2 in the Tibet sector

Sun, Yang‐Yi; Chen, Chieh‐Hung; Yu, Tao; Wang, Jin; Qiu, Lihui; Qi, Yifan; Lin, Kai Hsin

doi:10.1007/s44195-022-00002-6

Cited by 2 publications

(2 citation statements)

References 18 publications

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“…The enhancement in the F 2 region was attributed to the downward diffusion (Figures 2a and 2b) due to the thermal contraction during the obscuration (Chen et al., 2013, 2015; Evans, 1965a, 1965b; Le et al., 2008; Muller‐Wodarg et al., 1998; Rishbeth, 1970; Sun et al., 2022). The enhanced f o F 2 behavior during the first half of the solar eclipse over Wuhan (Figure 3a) mainly agrees with the observations from Yeh et al.…”

Section: Discussionmentioning

confidence: 99%

Convergence Effects on the Ionosphere During and After the Annular Solar Eclipse on 21 June 2020

Wang

Sun

et al. 2022

JGR Space Physics

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A moon shadow passed through the region of eastern and southern China and ends near sunset (∼09:30 UT) under the solar minimum condition on 21 June 2020. It is an opportunity to study the ionospheric behaviors influenced by the solar eclipse at low latitudes. Wang et al. (2021) analyzed the behaviors of the sporadic-E (E s ) layer during the solar eclipse on 21 June 2020. The continuously upward and downward movement of the E s layer reveals a prominent transport process occurring in the vertical direction of the ionosphere during the obscuration.It is known that the transport effect dominants the F region during an eclipse (Dear et al., 2020;Rishbeth, 1970;Tsai & Liu, 1999). Dang et al. (2020) simulated the thermospheric and ionospheric responses to the annular solar eclipse on 21 June 2020 using a coupled thermosphere-ionosphere-electrodynamics model. They suggested that the solar eclipse could cause the total electron content (TEC) enhancement in the equatorial ionospheric anomaly (EIA) area for nearly 4.5 hr under the influence of the transequatorial plasma transport. Using the ground-and space-based observations, Zhang et al. ( 2020) and Huang et al. (2020) showed that the ionospheric responses to the annular solar eclipse, such as the disturbances of TEC, electron density and temperature, and maximum plasma density of F 2 layer (N m F 2 ), are much complicated at low latitudes. They suggested that the disturbed electric field, neutral winds, thermal conduction, interhemispheric photoelectron transport process, are mainly responsible for these complicated behaviors. Aa et al. ( 2021) also observed these similar ionospheric behaviors and suggested that the perturbations in the field-aligned thermal conduction during the solar eclipse lead to the possible interconnections between the eclipse and the conjugate ionospheres. Sun et al. (2021) analyzed the TEC data from the ground-based Global Navigation Satellite System (GNSS) receivers over east and south Asia as well as the ionospheric F 2 layer critical frequency (f o F 2 ) and its height (h m F 2 ) recorded by the ionosonde at Puer (22.7°N, 101.05°E, 72% obscuration) on 21 June 2020. Their results showed that the eclipse-induced TEC perturbations behave as a large-scale terminator wave propagating northwestward after sunset. The previous studies comprehensively examined the effects of the eclipse on the ionosphere. However, the effect of the vertical plasma drifts on the F-layer induced by this solar eclipse was not clearly identified yet.

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Section: Discussionmentioning

confidence: 99%

Convergence Effects on the Ionosphere During and After the Annular Solar Eclipse on 21 June 2020

Wang

Sun

et al. 2022

JGR Space Physics

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“…Changes in TECs exhibit period characteristics longer than ~5 min that is probably related to the atmospheric gravity waves [36,37]. Generations of the gravity waves are mainly referred to variations in temperature near the Earth's surface [38][39][40][41][42][43][44]. In contrast, changes of TECs with period characteristics shorter than ~5 min are probably caused by the acoustic waves [45,46].…”

Section: Introductionmentioning

confidence: 99%

Numerical Solution of the Atmospheric Perturbations Triggered by Persistent Lithospheric Vibrations

Lin

Mao

et al. 2023

Remote Sensing

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Recently, atmospheric perturbations residing over around epicenters of forthcoming earthquakes were remotely sensed by the multiple instruments of the MVP-LAI (Monitoring of Vibrations and Perturbations in Lithosphere, Atmosphere and Ionosphere) system. In this study, we found another way and proposed a theory for the evolution of the perturbations in the atmosphere from the aspect of numerical simulation. We started from the fundamental hydromechanics equations for the perturbations based on the atmospheric dynamics in the cylindrical symmetric coordinate to solve their analytical solution. The solution shows that a persistent vibration at the bottom of the cylindrical symmetric coordinate tends to decay exponentially with along altitude. In other words, a persistent ground vibration in a wide area can rapidly evolve into small-scale perturbations in the atmosphere. The preliminary theoretical model in this study shows the kernel concept for the coupling of geospheres.

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Temperature response to the June 2020 solar eclipse observed by FORMOSAT-7/COSMIC2 in the Tibet sector

Cited by 2 publications

References 18 publications

Convergence Effects on the Ionosphere During and After the Annular Solar Eclipse on 21 June 2020

Convergence Effects on the Ionosphere During and After the Annular Solar Eclipse on 21 June 2020

Numerical Solution of the Atmospheric Perturbations Triggered by Persistent Lithospheric Vibrations

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