Climatology of the Equatorial Plasma Bubbles Captured by FORMOSAT‐3/COSMIC
Climatology of the Equatorial Plasma Bubbles Captured by FORMOSAT‐3/COSMIC
复制标题
FORMOSAT-3/COSMIC 捕获的赤道等离子体气泡的气候学
DOI：
10.1029/2019ja027680
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
J. Braun
中科院分区：
文献类型：
--
作者：
M. Chou;Qian Wu;N. Pedatella;I. Cherniak;W. Schreiner;J. Braun
FORMOSAT-3/COSMIC(F3/C)卫星用于研究低至中等太阳通量年(2008-2013年)赤道等离子体气泡(EPB)的气候学。我们使用F3/C总电子含量来识别EPBS的存在，并研究EPBS产生的背景条件。结果表明，EPB活动具有很强的太阳依赖性。EPBS的经度和季节变化趋势与黄昏太阳终结点与磁赤道附近磁力线的夹角高度相关。赤道电离异常结构的不对称性可能是由于赤道电离异常结构的不对称性造成的，这也是造成纵向差异的原因。在第24太阳周期的上升阶段(2011-2013年)，EPB向更高的海拔和纬度延伸，这主要是由于背景电子密度的增加。然而，在中等太阳通量年出现了EPB的高度不对称性，这可能是由于EPBS的生长和出现率受到抑制或较低所致。除垂直漂移外，潮汐强迫对EPB的纵向和季节分布也有贡献。在气候学上观察到了在EPBS之前的上升流和前驱波，这可能在EPBS的启动中起着至关重要的作用。这项研究还揭示了赤道电离层异常与大气强迫在气候学基础上的垂直联系。
The FORMOSAT‐3/COSMIC (F3/C) satellites are used to study the climatology of equatorial plasma bubbles (EPBs) during the low to moderate solar flux years (2008–2013). We use the F3/C total electron content to identify the presence of EPBs and investigate the background conditions for the initiation of EPBs. The results reveal that the EPB activities have strong solar dependence. The longitudinal and seasonal trends of EPBs are highly correlated to the angle between the dusk solar terminator and magnetic field lines near the magnetic equator. Asymmetries of EPBs between solstices and equinoxes exist and could be due partly to the asymmetry of equatorial ionization anomaly structures, which result in longitudinal differences as well. EPBs extend to higher altitudes and latitudes during the ascending phase of Solar Cycle 24 (2011–2013) due mainly to the increase of background electron density. However, an altitudinal asymmetry of EPBs occurs in moderate solar flux years, which is likely due to the suppression or lower growth and occurrence rates of EPBs. In addition to vertical drift, tidal forcing also contributes to the longitudinal and seasonal distributions of EPBs. Upwellings and precursor waves preceding the EPBs are observed climatologically, which likely play a vital role in initiating the EPBs. This study also reveals a vertical connection between the equatorial ionospheric irregularities and atmospheric forcing on a climatological basis.
影响因子：
3.9
作者：
H. Nakata;Akira Takahashi;T. Takano;A. Saito;T. Sakanoi
通讯作者：
H. Nakata;Akira Takahashi;T. Takano;A. Saito;T. Sakanoi
影响因子：
2.8
作者：
Nishioka, M.;Saito, A.;Tsugawa, T.
通讯作者：
Tsugawa, T.
IMAGE/FUV+EISCAT活动介绍
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
W.Ohashi;H.Hirota;T.Yamazaki;Yulin Gao;小川泰信
通讯作者：
小川泰信