Factors Controlling O+ and H+ Outflow in the Cusp during a Geomagnetic Storm: FAST/TEAMS observations
Factors Controlling O+ and H+ Outflow in the Cusp during a Geomagnetic Storm: FAST/TEAMS observations
复制标题
地磁风暴期间控制尖点 O 和 H 流出的因素：FAST/TEAMS 观测
DOI：
10.1029/2020gl086975
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发表时间：
2020
影响因子：
5.2
通讯作者：
Strangeway R.J.
中科院分区：
文献类型：
--
作者：
Zhao K.;Kistler L.M.;Lund E.J.;Nowrouzi N.;Kitamura N.;Strangeway R.J.
利用重新校准的FAST/Time‐of‐Flight Energy，Angle，Strangeway等人研究的1998年9月24日至25日地磁风暴期间的质谱仪（TEAMS）数据（2005年，https：//doi.org/10.1029/2004JA010829）。坡印亭通量和软电子沉降与向阳面尖区离子流出通量有较好的相关性，其中Sdc与O+流出通量的相关性最高，而与H+流出通量的相关性最好的是电子数通量。Alfvénic波在加速外流方面发挥着重要作用。平均O+/H+通量比为3.0，并且与坡印亭通量正相关，表明O+通量随着能量输入而更强烈地增加。
Factors related to two sources of energy input to the ionosphere, the Poynting flux associated with both quasistatic fields (Sdc) and Alfvénic fluctuations (Sac), and the soft electron precipitation, are investigated to evaluate their correlations with the O+and the H+outflows in the dayside cusp region by using recalibrated FAST/Time‐of‐Flight Energy, Angle, and Mass Spectrograph (TEAMS) data during the 24–25 September 1998 geomagnetic storm studied by Strangeway et al. (2005, https://doi.org/10.1029/2004JA010829). The Poynting flux and the soft electron precipitation are well correlated with ion outflow flux in the dayside cusp region.Sdcshows the highest correlation with the O+outflows, while it is the electron number flux that correlates best with the H+outflows. The Alfvénic waves play an essential role in accelerating outflows. The averaged O+/H+flux ratio is 3.0 and is positively correlated to the Poynting flux, suggesting that the O+flux increases more strongly with the energy input.