Results 41 to 50 of about 373,009 (204)

Study of height-spread sporadic-E layers observed in the South American Magnetic Anomaly

Frontiers in Astronomy and Space Sciences
Spread echoes from the E-region observed in ionograms obtained at high latitudes are generally classified as auroral sporadic-E (Esa) layers. These layers have also been detected in nighttime ionograms collected at some ionospheric stations in the South ...
J. Moro, Jiyao Xu, J. Bageston, L. D. Da Silva, L. Resende, C. D. De Nardin, V. Andrioli, A. M. Santos, G. Picanço, Hui Li, Zhengkuan Liu, Chi Wang, N. J. Schuch   +12 more
semanticscholar   +1 more source

Statistical Study of F‐Region Short Period Ionospheric Disturbances Related to Convection in the Lower Atmosphere Over Wuhan, China

Space Weather, 2022
We investigated the relationship between convective activity and F‐region short‐period ionospheric disturbances at middle latitudes from 2018 to 2020. The ionospheric variations were extracted from the total electron content (TEC) data obtained by the ...
Zhenlin Yang, Sheng‐Yang Gu, Yusong Qin, Chen‐Ke‐Min Teng, Fuqing Huang, Wenjie Sun, Xiankang Dou   +6 more
doaj   +1 more source

Physical mechanism for the temporary intensification of wintertime sporadic E layers in 2009

Earth, Planets and Space
This study provides a physical mechanism for the temporary intensification of wintertime sporadic E layers (EsLs) in 2009. It is widely accepted that vertical wind shears control EsL formations.
Satoshi Andoh, A. Saito, H. Shinagawa
semanticscholar   +1 more source

Mechanisms Underlying the Changes in Sporadic E Layers During Sudden Stratospheric Warming

Atmosphere
During sudden stratospheric warming (SSW) events, significant modifications occur, not only in the neutral atmosphere, but also in the ionosphere. Specifically, sporadic E layers in the mesosphere and lower thermosphere regions significantly disrupt ...
Haiyang Zheng, Hanxian Fang, Chao Xiao, Hongtao Huang, Die Duan, Ganming Ren   +5 more
doaj   +1 more source

Sporadic sodium and E layers observed during the summer 2002 MaCWAVE/MIDAS rocket campaign [PDF]

Annales Geophysicae, 2006
On 5 July 2002, a MaCWAVE (Mountain and Convective Waves Ascending VErtically) payload launched from Andøya Rocket Range, Norway, observed narrow enhanced layers of electron density that were nearly coincident with sporadic sodium layers ...
B. P. Williams, C. L. Croskey, C. Y. She, J. D. Mitchell, R. A. Goldberg   +4 more
doaj   +1 more source

A Simplified Method of True Height Analysis to Estimate the Real Height of Sporadic E Layers

Journal of Geophysical Research: Space Physics
The sporadic E (Es) layer virtual height h′Es ${h}^{\prime }Es$ and the ordinary wave critical frequency foEs $foEs$ are routinely measured ionogram parameters, used to characterize the Es altitude occurrence and intensity.
C. Haldoupis, Haris Haralambous, Chris Meek   +2 more
semanticscholar   +1 more source

First report of sporadic Na layers at Qingdao (36° N, 120° E), China [PDF]

Annales Geophysicae, 2014
This paper reports, for the first time, observational results of mesopause sporadic Na (Nas) layers by a ground-based lidar at Qingdao (36° N, 120° E), China.
Z. Ma, Z. Ma, X. Wang, X. Wang, L. Chen, J. Wu   +5 more
doaj   +1 more source

Occurrence and Modeling Examination of Sporadic‐E Layers in the Region of the South America (Atlantic) Magnetic Anomaly

Journal of Geophysical Research: Space Physics, 2019
In this work, the occurrence of different types of sporadic‐E layers (Es) was described for two stations located in the region of the South America Magnetic Anomaly: Jataí and São José dos Campos.
F. Conceição-Santos, M. Muella, L. Resende, P. Fagundes, V. Andrioli, P. Batista, V. Pillat, A. J. Carrasco   +7 more
semanticscholar   +1 more source

Searching for effects caused by thunderstorms in midlatitude sporadic E layers [PDF]

, 2017
Possible thunderstorm – sporadic E (Es) layer coupling effects are investigated during two measurement periods, one in 2013 and one in 2014. The analysis was based on ionospheric observations obtained from a Digisonde at Pruhonice, the Czech Republic, an
V. Barta, C. Haldoupis, Gabriella S'atori, D. Burešová, J. Chum, M. Pożoga, K. A. Ber'enyi, J'ozsef B'or, M. Popek, 'A. Kis, P. Bencze   +10 more
semanticscholar   +1 more source

On the Role of Thermospheric Winds and Sporadic E Layers in the Formation and Evolution of Electrified MSTIDs in Geomagnetic Conjugate Regions

Journal of Geophysical Research: Space Physics, 2018
The electrified medium‐scale traveling ionospheric disturbances (EMSTIDs) occurring as geomagnetically conjugate features in the middle latitude F region ionosphere are studied using multi‐instrument observations.
V. L. Narayanan, K. Shiokawa, Y. Otsuka, D. Neudegg   +3 more
semanticscholar   +1 more source