Disturbances in the Ionosphere That Accompanied Typhoon Activity in the Vicinity of China in September 2019

Chernogor, L. F.; Гармаш, К. П.; Guo, Qiang; Rozumenko, V. T.; Zheng, Yu; Luo, Y.

doi:10.1029/2022rs007431

Cited by 9 publications

(13 citation statements)

References 78 publications

(124 reference statements)

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“…The estimate of the relative disturbance (δ Na ) in the electron density at the reflection height (z r ) can be obtained from the expression analogous to Eq. ( 4) (Guo et al, 2019Chernogor et al, 2020):…”

Section: Estimates Of Wave Perturbation Amplitudes In the Atmospheric...mentioning

confidence: 99%

“…Infrasound waves of periods that are great enough (1-5 min) reach the ionospheric F region altitudes, modulate the electron density N, and consequently, f D (t) (see, e.g., Gossard and Hooke, 1975;Guo et al, 2019Chernogor et al, 2020). Consider, for example, the Beijing to Harbin radio-wave propagation path.…”

Section: Estimates Of Wave Perturbation Amplitudes In the Atmospheric...mentioning

confidence: 99%

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Ionospheric effects of the 5–6 January 2019 eclipse over the People's Republic of China: results from oblique sounding

Черногор

Гармаш²,

Guo³

et al. 2022

Ann. Geophys.

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Abstract. This paper deals with the variations in the Doppler spectra and in the relative amplitudes of the signals observed at oblique incidence over the People's Republic of China (PRC) during the partial solar eclipse of 5–6 January 2019 and on reference days. The observations were made using the multifrequency multipath radio system for sounding the ionosphere at oblique incidence. The receiver system is located at the Harbin Engineering University, PRC, and 14 HF broadcasting station transmitters are used for taking measurements along the following radio-wave propagation paths: Lintong/Pucheng to Harbin, Hwaseong to Harbin, Chiba/Nagara to Harbin, Hailar/Nanmen to Harbin, Beijing to Harbin (three paths), Goyang to Harbin, Ulaanbaatar/Khonkhor to Harbin, Yakutsk to Harbin (two paths), Shijiazhuang to Harbin, Hohhot to Harbin, and Yamata to Harbin. The specific feature of this partial solar eclipse was that it occurred during the local morning with a geomagnetic disturbance (Kp ≈ 3−) in the background. The response of the ionosphere to the solar eclipse has been inferred from temporal variations in the Doppler spectra, the Doppler shift, and the signal relative amplitude. The partial solar eclipse was found to be associated with broadening of the Doppler spectrum, up to ± 1.5 Hz, alternating sign Doppler-shift variations, up to ± 0.5 Hz, in the main ray, and quasi-periodic Doppler-shift changes. The relative amplitude of electron density disturbances in the 15 min period of atmospheric gravity wave field and in the 4–5 min period of infrasound wave field is estimated to be 1.6 %–2.4 % and 0.2 %–0.3 %, respectively. The estimates of a maximum decrease in the electron density are in agreement with the observations.

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Section: Estimates Of Wave Perturbation Amplitudes In the Atmospheric...mentioning

confidence: 99%

Section: Estimates Of Wave Perturbation Amplitudes In the Atmospheric...mentioning

confidence: 99%

Ionospheric effects of the 5–6 January 2019 eclipse over the People's Republic of China: results from oblique sounding

Черногор

Гармаш²,

Guo³

et al. 2022

Ann. Geophys.

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“…The results obtained in [5][6][7][8][9][10][11][12][13] permit us to consider a TC (typhoon) to be one of the elements of the ocean-atmosphere-ionosphere-magnetosphere system, which couples the system components listed above. The elucidation of the TC (typhoon) manifestations in the upper atmosphere and geospace has contributed to the understanding of basic processes operating in the system, which is of scientific significance for the studies of the TC (typhoon) as an element of the specified system.…”

Section: Introductionmentioning

confidence: 99%

A Tropical Cyclone or Typhoon as an Element of the Earth–Atmosphere–Ionosphere–Magnetosphere System: Theory, Simulations, and Observations

Chernogor

2023

Remote Sensing

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The premise has been validated that a tropical cyclone (TC, typhoon, hurricane), one of the most powerful large-scale formations systematically arising in the atmosphere, is an element of the ocean–atmosphere–ionosphere–magnetosphere system. The TC plays a crucial role with regard to a global-scale mass and energy exchange in this system. The study of this system encompasses a broad spectrum of physical phenomena occurring and processes operating within the system components, as well as the mechanisms of their interactions. The problem under discussion pertains to interdisciplinary science. Its scope ranges from different Earth sciences to geospace sciences, which comprise the physics of the ocean, meteorology, the physics of the Earth’s atmospheric and space environment, etc. Observations of the ionospheric response to the impact of a number of unique typhoons made using multifrequency multiple path oblique incidence ionospheric sounding have confirmed the definitive role that the internal gravity waves and infrasound play in producing atmospheric–ionospheric disturbances. It has been demonstrated that these disturbances are capable of significantly affecting the characteristics of high-frequency radio waves.

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“…The relationship between the ionospheric disturbances and the intense atmospheric activities has been found in the foF2 changes (Bauer, 1958) as well as the traveling ionospheric disturbances (Hung et al., 1978; Tsutsui & Ogawa, 1973). There are many claims for the cause of the disturbance, and gravity waves are the main reason (Chernogor et al., 2021, 2022). The acoustic gravity waves caused by the typhoon result in ionospheric disturbances (Tsutsui & Ogawa, 1973).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Ionospheric Disturbances Following Multiple Typhoons Using GPS‐Derived TEC

Jin

2022

JGR Space Physics

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Typhoon is one of the major hazards in ocean coastal areas, but traditional techniques are inadequate to monitor typhoons due to limited or high‐cost observations, like radio sounding and meteorological radar. Previous studies have found that typhoons can cause ionospheric disturbances, but the relationship and characteristics are still unclear. In this paper, about 400 stations observations of the Global Positioning System (GPS) network in Taiwan are used to extract ionospheric disturbances during multiple typhoons. The detailed characteristics of the ionospheric disturbances are investigated using a fourth‐order Butterworth filter following the 2016 Nepartak, 2019 Lekima, 2019 Mitag, and 2020 Hagupit typhoons. The results show that significant ionospheric disturbances were observed during the typhoons, and the larger disturbances are mostly located 400–1200 km far from the typhoon eye. The estimated horizontal propagation velocity of the ionospheric disturbances is about 127–194 m/s. The locations of the ionospheric disturbances between the typhoon eye and the landfall site are related to the typhoon path. The azimuth distribution of the ionospheric disturbance around the typhoon eye is affected by the GPS elevation angles. At 500–700 km from the typhoon eye, the mean ionospheric disturbances are 0.17 TECU (TEC Unit) and 0.15 TECU for super typhoon Nepartak and Lekima, and 0.13 TECU and 0.18 TECU for typhoon Mitag and Hagupit. The higher the intensity of the typhoon is, the greater the magnitude of the ionospheric disturbance is.

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Disturbances in the Ionosphere That Accompanied Typhoon Activity in the Vicinity of China in September 2019

Cited by 9 publications

References 78 publications

Ionospheric effects of the 5–6 January 2019 eclipse over the People's Republic of China: results from oblique sounding

Ionospheric effects of the 5–6 January 2019 eclipse over the People's Republic of China: results from oblique sounding

A Tropical Cyclone or Typhoon as an Element of the Earth–Atmosphere–Ionosphere–Magnetosphere System: Theory, Simulations, and Observations

Characterization of Ionospheric Disturbances Following Multiple Typhoons Using GPS‐Derived TEC

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