Magnetic conjugacy of northern and southern auroral beads
Magnetic conjugacy of northern and southern auroral beads
复制标题
南北极光珠的磁耦合
DOI:
10.1029/2012gl051599
复制
发表时间:
2012
期刊:
影响因子:
--
通讯作者:
K. Hosokawa and N. Sato
中科院分区:
文献类型:
--
作者:
Motoba;T.;A. Kadokura;K. Hosokawa and N. Sato
Auroral beads, i.e., azimuthally arrayed bright spots resembling a pearl necklace, have recently drawn attention as a possible precursor of auroral substorms. We used simultaneous, ground‐based, all‐sky camera observations from a geomagnetically conjugate Iceland‐Syowa Station pair to demonstrate that the auroral beads, whose wavelength is ∼30–50 km, evolve synchronously in the northern and southern hemispheres and have remarkable interhemispheric similarities. In both hemispheres: 1) they appeared almost at the same time; 2) their longitudinal wave number was similar ∼300–400, corresponding bead separation being ∼1° in longitude; 3) they started developing into a larger scale spiral form at the same time; 4) their propagation speeds and their temporal evolution were almost identical. These interhemispheric similarities provide strong evidence that there is a common driver in the magnetotail equatorial region that controls the major temporal evolution of the auroral beads; thus, the magnetosphere plays a primary role in structuring the initial brightening arc in this scale size.
登录
查看更多内容
影响因子:
2.8
作者:
Lummerzheim, D;Galand, M;Rich, FJ
通讯作者:
Rich, FJ
DOI:
--
发表时间:
2009
期刊:
Ann.Geophys. 27
影响因子:
--
作者:
Sakaguchi;K.;K.Shiokawa;A.Ieda;R.Nomura;A.Nakajima;M.Greffen;E.Donovan;I.R.Mann;H.Kim;M.Lessard
通讯作者:
M.Lessard
影响因子:
2.8
作者:
Kataoka, Ryuho;Miyoshi, Yoshizumi;Ebihara, Yusuke
通讯作者:
Ebihara, Yusuke
影响因子:
--
作者:
Motoba;T.;K.Hosokawa;N.Sato;Kadokura;G.Bjornsson
通讯作者:
G.Bjornsson