Solar illumination control of ionospheric outflow above polar cap arcs
Solar illumination control of ionospheric outflow above polar cap arcs
复制标题
极冠弧上方电离层流出的太阳光照控制
DOI:
10.1002/2014gl062972
复制
发表时间:
2015
影响因子:
5.2
通讯作者:
Maes L
中科院分区:
文献类型:
--
作者:
Maes L
We measure the flux density, composition, and energy of outflowing ions above the polar cap, accelerated by quasi‐static electric fields parallel to the magnetic field and associated with polar cap arcs, using Cluster. Mapping the spacecraft position to its ionospheric foot point, we analyze the dependence of these parameters on the solar zenith angle (SZA). We find a clear transition at SZA between ∼94° and ∼107°, with the O+flux higher above the sunlit ionosphere. This dependence on the illumination of the local ionosphere indicates that significant O+upflow occurs locally above the polar ionosphere. The same is found for H+, but to a lesser extent. This effect can result in a seasonal variation of the total ion upflow from the polar ionosphere. Furthermore, we show that low‐magnitude field‐aligned potential drops are preferentially observed above the sunlit ionosphere, suggesting a feedback effect of ionospheric conductivity.
登录
查看更多内容
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
T. Nagai;J. Waite;J. Green;C. Chappell;R. Olsen;R. H. Comfort
通讯作者:
R. H. Comfort
DOI:
--
发表时间:
1963
期刊:
影响因子:
--
作者:
T. Davis
通讯作者:
T. Davis
DOI:
10.1016/j.jastp.2006.08.011
发表时间:
2007
影响因子:
1.9
作者:
W. Lotko
通讯作者:
W. Lotko
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
Yihua Zheng;T. Moore;F. Mozer;C. Russell;R. Strangeway
通讯作者:
R. Strangeway
影响因子:
--
作者:
Yi‐Jiun Su;J. Horwitz;G. Wilson;P. Richards;D. G. Brown;C. W. Ho
通讯作者:
Yi‐Jiun Su;J. Horwitz;G. Wilson;P. Richards;D. G. Brown;C. W. Ho