Magnetic flux transport by dipolarizing flux bundles

作者：Liu Jiang^*; Angelopoulos V; Zhou Xu Zhi; Runov A

来源：JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2014, 119(2): 909-926.

DOI：10.1002/2013JA019395

• dipolarizing flux bundle
• dipolarization front
• magnetic flux trasnport
• convection
• magnetotail
• electric field

A dipolarizing flux bundle (DFB) is a small magnetotail flux tube (typically65% of BBF flux transport, even though they last only similar to 30% as long as BBFs. The rate of DFB flux transport increases with proximity to Earth and to the premidnight sector, as well as with geomagnetic activity and distance from the neutral sheet. Under the latter two conditions, the total flux transport by a typical DFB also increases. Dipolarizing flux bundles appear more often during increased geomagnetic activity. Since BBFs have been previously shown to be the major flux transporters in the tail, we conclude that DFBs are the dominant drivers of this transport. The occurrence rate of DFBs as a function of location and geomagnetic activity informs us about processes that shape global convection and energy conversion.

• 出版日期2014-2