The interaction between stratospheric monthly mean regional winds and sporadic-E

Abstract

In the present study, a statistical investigation is carried out to explore whether there is a relationship between the critical frequency (foEs) of the sporadic-E layer that is occasionally seen on the E region of the ionosphere and the quasibiennial oscillation (QBO) that flows in the east-west direction in the equatorial stratosphere. Multiple regression model as a statistical tool was used to determine the relationship between variables. In this model, the stationarity of the variables (foEs and QBO) was firstly analyzed for each station (Cocos Island, Gibilmanna, Niue Island, and Tahiti). Then, a cointegration test was made to determine the existence of a long-term relationship between QBO and foEs. After verifying the presence of a long-term relationship between the variables, the magnitude of the relationship between variables was further determined using the multiple regression model. As a result, it is concluded that the variations in foEs were explainable with QBO measured at 10 hPa altitude at the rate of 69%, 94%, 79%, and 58% for Cocos Island, Gibilmanna, Niue Island, and Tahiti stations, respectively. It is observed that the variations in foEs were explainable with QBO measured at 70 hPa altitude at the rate of 66%, 69%, 53%, and 47% for Cocos Island, Gibilmanna, Niue Island, and Tahiti stations, respectively.

Possible Effect of Stratospheric QBO on The Ionospheric E-Region Current Densities

“…In addition, it is also seen that both the eastern and western directions of the QBO are effective on current densities as positive. Similarly, in examinations made between the QBO and ionospheric parameters; it was reported that QBO was related in TEC (0.704) (Tang et al, 2015), between foF2 (0.64) (Chen, 1992); with foE 0.50 (Atıcı and Sagir); with foEs (between 0.58-0.94 range) (Cetin et al, 2017). In addition, Sagir et al (2015) reported a positive relation between the directions of the QBO and NnD.…”

“…It is known that Stratospheric QBO affects the ionosphere especially on the equatorial region [5,6,8,[10][11][12][13][14]. In the present study, the relation of QBO with the current density of the E-region of the ionosphere, which has a significant impact on satellite positioning, space weather forecast, and radio wave propagation were examined.…”

2015 Yılında Meydana Gelen Üç Şiddetli Jeomanyetik Fırtına Süresince Deneysel İyonosferik Modellerin Karşılaştırılması

“…Araştırma Makalesi/ Research Article MSU J. of Sci., 10:2 977-991, 2022 DOI: https://doi.org/10.18586/msufbd.1176184 ARIMA, machine learning, deep learning, experimental orthogonal analysis [1][2][3][4][5][6].…”

Response of Sporadic E Layer to Sudden Stratospheric Warming Events Observed at Low and Middle Latitudes

“…It is generally recognized that middle‐ and low‐latitude E s formation is attributed to meteor debris and neutral wind dynamics in mesosphere and lower thermosphere (MLT) region, which is an important transition zone of the coupling between ionosphere and low atmosphere (Mathews, ; Whitehead, ). E s is closely related to atmospheric waves with different scales, such as atmospheric gravity waves (Woodman et al, ), tidal waves (e.g., Haldoupis et al, ; Zhou et al, ), planetary waves (PWs; e.g., Haldoupis & Pancheva, ; Pancheva et al, ), Quasi‐Biennial Oscillation (Çetin et al, ), and even El Niño–Southern Oscillation (Chang et al, ).…”