Plasma Blobs Concurrently Observed With Bubbles in the Asian-Oceanian Sector During Solar Maximum
Plasma Blobs Concurrently Observed With Bubbles in the Asian-Oceanian Sector During Solar Maximum
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太阳活动极大期期间，在亚洲-大洋洲区域同时观测到等离子体团和气泡
DOI：
10.1029/2018ja026373
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发表时间：
2019
影响因子：
2.8
通讯作者：
Wang Xiao
中科院分区：
文献类型：
--
作者：
Wang Zheng;Liu Huixin;Shi Jiankui;Wang Guojun;Wang Xiao
利用ROCSAT-1卫星和地面电离层探测仪/GPS接收器的电离层同步测量，在太阳活动高峰期的22：30左右，在亚洲-大洋洲地区观测到3个在同一磁子午线上同时存在的等离子体气泡和气泡。观测到两个个例：VAnimo站赤道扩散F(ESF)(Geog)。S，东经141.3°；地貌。10.2°S，146.2°W)和8°S附近的等离子体斑点。2003年6月1日和10月6日。另一例观测到海南站赤道散布(Geog.北纬19.5°，东经109.1°；地貌。9.1°N，179.1°W)和倾角赤道附近的等离子体团。在赤道附近600公里高的地方都观察到了等离子体斑点。在同一磁子午线附近观测到来自地面站的赤道扩展F和幅度闪烁，表明气泡的存在。考虑到等离子体气泡和气泡都是场向拉长结构，磁力线作图表明，在VAnimo的两个例子中，气泡位于气泡之上，为等离子体气泡演化中期的斑点形成提供了直接的观测证据；在海南的例子中，气团和气泡可能在相似的高度，它可能是由重力波产生的。
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 spreadF(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 spreadFover 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 spreadFand 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.