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Highly Sensitive Optical Observations of Aurcraand Upper Atmosphere in the Canadian Arctic

加拿大北极地区 Aurcra 和高层大气的高灵敏度光学观测

基本信息

批准号：
16403007
负责人：
OGAWA Tadahiko
金额：
$ 6.53万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16403007/
关键词：
aurora polar cap plasma patch atmospheric gravity wave coordinated ground-satellite measurements substorm geomagnetic storm international collaboration Canada : USA

项目摘要

Two all-sky airglow/aurora imagers were installed at two Canadian stations at Resolute Bay(RSB)and Athabasca observed polar-cap plasma patches almost always(ATH))in 2005, At RSB, we always during southward IMF periods, From two-dimensional cross-correlation analyses, we determined velocity vectors of the patches, which indicates the ionospheric convection vector, that showed high correlation with the IMF-By and -Bz variations. At ATH, we often observed isolated proton arcs and Stable Auroral Red (SAR) arcs, which were located equatorward of the amoral oval The appearance of the isolated proton arcs was highly correlated with the Pc 1 geomagnetic pulsations measured simultaneously at ATH, suggesting interactions between the electromagnetic ion cyclotron (EMK) waves and protons in the vicinity of the plasmapause and the ring current. Similar interactions without waves were also suggested for the SAR arcs, which appeared after the substorm expansion phase even without geomagnetic storm. These observations show promising capability monitor magnetospheric processes from the ground stations, whit would contribute to the future satellite projects such as THEMES, ERG, and Scope/Xscale

2005年，在加拿大Resolute Bay（RSB）和Athabasca观测站安装了两台全天空气辉/极光成像仪，观测到了极冠等离子体斑（ATH）。在Resolute Bay观测站，观测到了向南的IMF周期。在ATH上，我们经常观测到孤立的质子弧和稳定的极光红（SAR）弧，它们位于非道德椭圆的赤道方向。孤立的质子弧的出现与ATH上同时测量的Pc 1地磁脉动高度相关，表明电磁离子回旋（EMK）波与等离子体顶附近的质子和环电流之间的相互作用。类似的相互作用没有波也建议的SAR弧，出现在亚暴扩展阶段后，即使没有地磁暴。这些观测结果显示了从地面站监测磁层过程的良好能力，这将有助于未来的卫星项目，如THEMES，ERG和Scope/Xscale