Ohmic heating as evidence for strong field-aligned currents in filamentary aurora
Ohmic heating as evidence for strong field-aligned currents in filamentary aurora
A large increase in electron temperature measured in filamentary aurora with the European incoherent scatter radar has been modeled with a one-dimensional electron transport and ion chemistry code. To account for the observed changes in electron temperature, while also reproducing the measured E region electron density profiles, a source of electron heating is required in addition to local heating from energy degradation of the precipitating electrons. We show that ohmic heating in a strong field-aligned current can account for the required heat source.
ionosphere, particle precipitation, Ionosphere, plasma temperature and density, magnetospheric physics, current systems
1785-1794
Lanchester, B.S.
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Lummerzheim, D.
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Otto, A.
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Rees, M.H.
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Sedgemore-Schulthess, K.J.F.
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Zhu, H.
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McCrea, I.W.
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1 February 2001
Lanchester, B.S.
e864533e-eea0-471f-a3f9-7c70c25be55b
Lummerzheim, D.
6432baa4-48ac-4203-bc2d-973de7f3efde
Otto, A.
7a7273f8-b54e-438f-a3b4-ed59323cdacc
Rees, M.H.
6ecc0166-51bf-4afd-9471-acbb415fd156
Sedgemore-Schulthess, K.J.F.
f4e1a9d3-850a-4169-ae6a-0fb5342bc456
Zhu, H.
56de08ce-886f-4d04-bbc5-ee175ce014ae
McCrea, I.W.
20f26ce6-db81-4ce4-af69-3bee87e65923
Lanchester, B.S., Lummerzheim, D., Otto, A., Rees, M.H., Sedgemore-Schulthess, K.J.F., Zhu, H. and McCrea, I.W.
(2001)
Ohmic heating as evidence for strong field-aligned currents in filamentary aurora.
Journal of Geophysical Research, 106 (A2), .
(doi:10.1029/1999JA000292).
Abstract
A large increase in electron temperature measured in filamentary aurora with the European incoherent scatter radar has been modeled with a one-dimensional electron transport and ion chemistry code. To account for the observed changes in electron temperature, while also reproducing the measured E region electron density profiles, a source of electron heating is required in addition to local heating from energy degradation of the precipitating electrons. We show that ohmic heating in a strong field-aligned current can account for the required heat source.
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Published date: 1 February 2001
Keywords:
ionosphere, particle precipitation, Ionosphere, plasma temperature and density, magnetospheric physics, current systems
Identifiers
Local EPrints ID: 37648
URI: http://eprints.soton.ac.uk/id/eprint/37648
ISSN: 0148-0227
PURE UUID: 241a27b4-270c-4358-bc60-0ab97a878def
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Date deposited: 24 May 2006
Last modified: 15 Mar 2024 08:00
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Contributors
Author:
B.S. Lanchester
Author:
D. Lummerzheim
Author:
A. Otto
Author:
M.H. Rees
Author:
K.J.F. Sedgemore-Schulthess
Author:
H. Zhu
Author:
I.W. McCrea
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