First Conjugate Observations of Medium‐Scale Traveling Ionospheric Disturbances (MSTIDs) in the Europe‐Africa Longitude Sector

First Conjugate Observations of Medium‐Scale Traveling Ionospheric Disturbances (MSTIDs) in the Europe‐Africa Longitude Sector
复制标题

欧洲和非洲经度扇区中规模移动电离层扰动 (MSTID) 的首次共轭观测

DOI:
10.1029/2018ja026018
复制
发表时间:
2019
期刊:
Journal of Geophysical Research: Space Physics
影响因子:
--
通讯作者:
Umbriaco, Gabriele
Umbriaco, Gabriele
中科院分区:
--
文献类型:
--
作者:
Martinis, Carlos;Baumgardner, Jeffrey;Mendillo, Michael;Wroten, Joei;MacDonald, Timothy;Kosch, Michael;Lazzarin, Monica;Umbriaco, Gabriele

文献摘要

参考文献

被引文献

相似文献

位于意大利阿夏戈(45.87oN,11.53oE;40.7o磁纬度)和南非萨瑟兰(32.37oS,20.81oE;-40.7o磁纬度)的全天空成像仪用于研究磁共轭中尺度行进电离层扰动(MSTID)。我们展示了 2016 年 7 月至 2017 年 6 月 Asiago-Sutherland 联合数据集第一年的初步结果。经常观察到显示不同类型波的 630.0 nm 气辉扰动。其中一些波浪事件类似于在阿夏戈向西南传播的 MSTID,这是在北半球其他经度扇区观察到的典型方向。它们大多被观察为在全天空成像仪视野中传播的单条带。我们选择并分析了与 MSTID 相关的磁共轭带的 5 个案例。在萨瑟兰观测到的波段主要向西移动,与在南半球观测到的 MSTID 的西北传播方向明显不同。我们比较了 MSTID 的传播速度,发现萨瑟兰的三种情况显示出较大的值。当我们比较萨瑟兰的区域速度时,所有情况都显示出较大的值。平均而言,萨瑟兰的传播速度要高出 20%,纬向速度要高出约 35%。萨瑟兰的向西运动是通过考虑其磁偏角(~24oW)如何影响磁带方向来解释的。萨瑟兰的速度较大是由于南半球地球磁场较弱以及该经度区域磁场线的特殊配置。
All‐sky imagers located in Asiago, Italy (45.87oN, 11.53oE; 40.7omagnetic latitude) and Sutherland, South Africa (32.37oS, 20.81oE; −40.7omagnetic latitude) are used to study magnetically conjugate medium scale traveling ionospheric disturbances (MSTIDs). We present initial results from the first year of joint Asiago‐Sutherland data sets from July 2016 to June 2017. The 630.0‐nm airglow perturbations showing different kinds of waves were frequently observed. Some of these wave events resemble MSTIDs propagating south‐westward in Asiago, typical direction observed at other longitude sectors in the northern hemisphere. They are mostly observed as single bands propagating through the field of view of the all‐sky imagers. We select and analyze five cases of magnetically conjugate bands associated with MSTIDs. The bands observed at Sutherland move mainly westward, noticeably different from the north‐west direction of propagation of MSTIDs observed in the southern hemisphere. We compare the MSTIDs propagation speeds and find that three cases show larger values at Sutherland. When we compare the zonal speeds all the cases show larger values at Sutherland. On average, the propagation speed at Sutherland is 20% larger and the zonal speed is ~35% larger. The westward motion at Sutherland is explained by taking onto account how its magnetic declination (~24oW) affects the orientation of the bands. The larger speed at Sutherland is due to the weaker Earth's magnetic field in the southern hemisphere and the particular configuration of the magnetic field lines in this longitude sector.
欧洲上空的空间天气成像
DOI: 10.1002/swe.20027
发表时间: 2013
期刊: Space Weather
影响因子: 3.7
作者:
Baumgardner J
通讯作者: Baumgardner J
对电离层高度处的磁层边界进行成像
DOI: --
发表时间: 2013
期刊:
影响因子: --
作者:
M. Mendillo;J. Baumgardner;J. Wroten;C. Martinis;Steven M. Smith;K. Merenda;T. Fritz;M. Hairston;R. Heelis;C. Barbieri
通讯作者: C. Barbieri
阿根廷 El Leoncito 的成像科学
DOI: --
发表时间: 2006
期刊:
影响因子: --
作者:
C. Martinis;J. Baumgardner;Steven M. Smith;M. Colerico;M. Mendillo
通讯作者: M. Mendillo
DOI: 10.1029/2002ja009639
发表时间: 2003-04
影响因子: --
作者:
K. Shiokawa;Y. Otsuka;C. Ihara;T. Ogawa;F. Rich
通讯作者: K. Shiokawa;Y. Otsuka;C. Ihara;T. Ogawa;F. Rich
DOI: 10.1029/96ja02786
发表时间: 1997-04
影响因子: --
作者:
M. Mendillo;J. Baumgardner;D. Nottingham;J. Aarons;B. Reinisch;J. L. Scali;M. Kelley
通讯作者: M. Mendillo;J. Baumgardner;D. Nottingham;J. Aarons;B. Reinisch;J. L. Scali;M. Kelley