Sökning: id:"swepub:oai:DiVA.org:uu-149374" >
Evaluation of subst...
Evaluation of substorm models with Cluster observations of plasma flow reversal in the magnetotail
-
Lui, A. T. Y. (författare)
-
Zheng, Y. (författare)
-
Reme, H. (författare)
-
visa fler...
-
Dunlop, M. W. (författare)
-
- Gustafsson, Georg (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
-
visa färre...
-
(creator_code:org_t)
- Elsevier BV, 2008
- 2008
- Engelska.
-
Ingår i: Advances in Space Research. - : Elsevier BV. - 0273-1177 .- 1879-1948. ; 41:10, s. 1611-1618
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- We evaluate two prevailing substorm, models with an event of plasma flow reversal from tailward to Earthward detected by Cluster at the downstream distance of similar to 19 R-E in the magnetotail during a substorm. oil August 22, 2001. We use the unique capability of Cluster measurements in determining gradients to examine the associated current density, Lorentz force, and current dissipation/dynamo term. In association with plasma flow reversal, it is found that (1) there was no clear quadrupole magnetic perturbation signature, (2) the x-component of the Lorentz force did not change sign, (3) the y-component of the product of the current density and the electric field was occasionally negative indicative of a dynamo effect, and (4) the timing sequence of flow reversal from the Cluster configuration did not match tailward motion of a single plasma flow source. These observations are consistent with the near-Earth initiation model for substorms with multiple current disruption sites moving progressively tailward near the late stage of substorm expansion.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- substorm
- current disruption
- Physics
- Fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas