Sökning: onr:"swepub:oai:DiVA.org:umu-183118" >
Tailward Flows in t...
Tailward Flows in the Vicinity of Fast Earthward Flows
-
- Chong, Ghai Siung (författare)
- Umeå universitet,Institutionen för fysik
-
- De Spiegeleer, Alexandre (författare)
- Umeå universitet,Institutionen för fysik
-
- Hamrin, Maria, 1972- (författare)
- Umeå universitet,Institutionen för fysik
-
visa fler...
-
- Pitkänen, Timo, 1979- (författare)
- Umeå universitet,Institutionen för fysik,Institute of Space Sciences, Shandong University, Weihai, China; Space Physics and Astronomy Research Unit, University of Oulu, Oulu, Finland
-
- Gunell, Herbert (författare)
- Umeå universitet,Institutionen för fysik
-
- Aizawa, S. (författare)
- Research Institute in Astrophysics and Planetology, Toulouse, France
-
visa färre...
-
(creator_code:org_t)
- Blackwell Publishing, 2021
- 2021
- Engelska.
-
Ingår i: Journal of Geophysical Research - Space Physics. - : Blackwell Publishing. - 2169-9380 .- 2169-9402. ; 126:4
- Relaterad länk:
-
https://doi.org/10.1...
-
visa fler...
-
https://umu.diva-por... (primary) (Raw object)
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- The occurrence of tailward flows in the magnetotail plasma sheet is closely linked to the dynamics of earthward bursty bulk flows (BBFs). Tailward flows that are observed in the vicinity of these BBFs (or TWABs – Tailward flows around BBFs) may hold unique information on its origin. In this study, we conduct a statistical survey on TWABs by using data from the Cluster mission. We find that TWABs are observed in the vicinity of ∼75% of the BBFs and their occurrence does not depend on BBF velocity magnitude. TWABs have a flow convection pattern consistent with the general tailward flows (GTWs) in the plasma sheet and they do not resemble vortical-like flows. However, TWABs have a flow velocity magnitude twice larger than the GTWs. The plasma density and temperature of TWABs are comparable with BBFs. It is more common to observe a TWAB succeeding than preceding a BBF. However, there is no distinctive difference (in flow pattern, plasma density and temperature) between preceding and succeeding TWABs. We suggest that TWABs are likely the “freshly” rebounded BBFs from the near-Earth region where the magnetic field is stronger. TWABs may represent the early stage of the evolution of tailward flows in the plasma sheet. We also discuss and argue that other mechanisms such as shear-induced vortical flows and tailward slipping of depleted flux tubes cannot be the principal causes of TWABs.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- bursty bulk flow
- formation mechanism of tailward flows
- magnetotail
- rebound of bursty bulk flows
- vortical flows
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas