Plasma Blobs Concurrently Observed With Bubbles in the Asian‐Oceanian Sector During Solar Maximum

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  • Zheng Wang
    State Key Laboratory of Space Weather National Space Science Center, CAS Beijing China
  • Huixin Liu
    Department of Earth and Planetary Science Kyushu University Fukuoka Japan
  • Jiankui Shi
    State Key Laboratory of Space Weather National Space Science Center, CAS Beijing China
  • Guojun Wang
    State Key Laboratory of Space Weather National Space Science Center, CAS Beijing China
  • Xiao Wang
    State Key Laboratory of Space Weather National Space Science Center, CAS Beijing China

書誌事項

公開日
2019-08
資源種別
journal article
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2018ja026373
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>With simultaneous ionospheric measurements from ROCSAT‐1 satellite and ground ionosondes/GPS receivers, three cases of concurrent plasma blobs and bubbles in the same magnetic meridian were observed around 22:30 LT in Asian‐Oceanian sector during solar maximum. Two cases were observed: equatorial spread <jats:italic>F</jats:italic> (ESF) over Vanimo station (geog. 2.7°S, 141.3°E; geom. 11.2°S, 146.2°W) and plasma blobs around 8.0°S (geom.) on 1 June and 6 October 2003. The other case observed equatorial spread <jats:italic>F</jats:italic> over Hainan station (geog. 19.5°N, 109.1°E; geom. 9.1°N, 179.1°W) and plasma blob near the dip equator on 8 March 2004. Plasma blobs were all observed near 600‐km height near the equator. Equatorial spread <jats:italic>F</jats:italic> and amplitude scintillations from the ground stations were observed near the same magnetic meridian, indicating the existence of bubbles. Considering that both plasma bubbles and blobs are field‐aligned elongated structures, magnetic field line mapping shows that in the two cases at Vanimo, blobs were above bubbles, providing direct observational evidence for blob formation in the intermediate stage of plasma bubble evolution; in the case at Hainan, the blob and bubble were likely at similar height, and it could be generated by gravity wave.</jats:p>

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