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  Spatial characteristics on the occurrence of the nighttime midlatitude medium‐scale traveling ionospheric disturbance at topside ionosphere revealed by the Swarm satellite.

Wan, X., Xiong, C., Wang, H., Zhang, K., Yin, F. (2020): Spatial characteristics on the occurrence of the nighttime midlatitude medium‐scale traveling ionospheric disturbance at topside ionosphere revealed by the Swarm satellite. - Journal of Geophysical Research: Space Physics, 125, 8, e2019JA027739.
https://doi.org/10.1029/2019JA027739

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 Urheber:
Wan, Xin1, Autor
Xiong, C.2, Autor              
Wang, Hui1, Autor
Zhang, Kedeng1, Autor
Yin, Fan1, Autor
Affiliations:
1External Organizations, ou_persistent22              
22.3 Geomagnetism, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_146030              

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 Zusammenfassung: Using six years collecting of electron density (Ne ) data from the Swarm A satellite, this study portrays comprehensive maps of the occurrence of medium‐scale traveling ionospheric disturbance (MSTID) at middle latitudes, which is characterized by the in‐situ absolute Ne fluctuations above a certain threshold. Two interesting spatial preference on the occurrence of MSTID as well as their dependence on local time and solar cycle are captured. That is, 1) regional preference near Weddell Sea Anomaly (WSA) to its west during Dec. Solstice, MSTID in this region appears even at very low latitudes (at least to 100 N in magnetic latitude); 2) preference at middle latitudes with a wide zonal extension which is similar to the recently disclosed nighttime midlatitude plasma band‐like enhancement (NMPBE) of the background plasma density (Zhong et al., 2019). The first preference of MSTID occurring near WSA region can be understood as the effects of horizontal neutral wind contribution to the Perkins instability, with the principal requirement of sporadic E occurrence via ionospheric E‐F region coupling. The fundamental mechanism of the second preference of MSTID occurring includes the inter‐hemispheric coupling that the MSTID can also develop in the winter hemisphere where the local growth rate of Perkins instability is low. Besides, the presence of NMPBE during low solar activity years sets up a favorable environment for the appearance of MSTID with considerable fluctuation amplitude.

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 Datum: 2019-06-022019-12-182020-06-092020-072020
 Publikationsstatus: Final veröffentlicht
 Seiten: 25
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 Identifikatoren: DOI: 10.1029/2019JA027739
GFZPOF: p3 PT1 Global Processes
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Titel: Journal of Geophysical Research: Space Physics
Genre der Quelle: Zeitschrift, SCI, Scopus
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Seiten: - Band / Heft: 125 (8) Artikelnummer: e2019JA027739 Start- / Endseite: - Identifikator: ISSN: 2169-9380
Anderer: 2169-9402
Anderer: American Geophysical Union (AGU)
Anderer: Wiley
CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/jgr_space_physics
Publisher: American Geophysical Union (AGU)